Gene Larson's Shop Notes

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MODEL SCALES
and
SCALE CONVERSION CHARTS

This page contains the following charts:

Scale Use Chart

Scale Conversion Chart

Actual Sizes in Fractional Inches

Actual Sizes in Metric Dimensions (mm)

Actual Sizes in Standard Drill Sizes

Actual Sizes in United States Steel Wire Gage

SCALE USE CHART
By: Gene Larson

Note:

The left hand column is the direct ratio for English or metric.
For example:
1/48 is 1"=48", or 1'=48', or 1yd=48yd
1mm=48mm, or 1cm=48cm, or 1m=48m, etc

The typical math is:
1/48: 1" = 48" = 48/12' = 4' or 1/4" = 1'

The formula for converting rope circumference to scale diameter:
C/3.1416 x scale multiplier
For 1:48: Dia.(scale) = c/3.1416 x (1/48) = c x .00663

.00663 is the scale multiplier factor.

RATIO	For 1"	For 1'	Rope Circumference to Diameter Factor	Application
1:2400	1"=200'			ship - war games
1:1200	1"=100'			ship - war games and Navy ID models
1:768		1/64"=1'	0.00041
1:720	1"=1"=60'			ship - plastic
1:700	1"=58'-4"			ship - plastic and resin kits
1:600	1"=50'			ship - plastic
1:500				WWII ID models
1:400	1"=33'-4"			ship - plastic
1:384	1"=32'	1/32"=1'	0.00083
1:350	1"=29'-2"			ship - plastic and resin kits
1:300	1"=25'
1:240	1"=20'
1:220				Z gauge for model railroad
1:200	1"=16'-8"			ship - plastic
1:192	1"=16'	1/16"=1'	0.00166	large ships
1:160	1"=13'-4"			N gauge for model railroad
1:144	1"=12'	.083"=1'		aircraft
1:128	1"=10'-8"	3/32"=1'	0.00249
1:120				TT gauge for model railroad
1:100	1"=8'-4"
1:96	1"=8'	1/8"=1'	0.00332	medium ships
1:87.1				HO gauge for model railroad
1:76.8	1"=6'-4.8"	5/32"=1'	.00414	A few larger ship models
1:76				OO gauge for model railroad (British HO)
1:72	1"=6'			aircraft
1:64	1"=5'-4"	3/16"=1'	0.00497	S gauge for model railroad (American Flyer) <BR< Wheels Hot &>
1:60	1"=5'
1:54	1"=4'-6"
1:50	1"=4'-2"
1:48	1"=4'	1/4"=1'	0.00663	museum standard for ships within size constraints O gauge for model railroad (standardized) aircraft & armor
1:43.5				original O gauge for model railroad
1:38.4	1"=3'-2.4"	5/16"=1'	0.00838
1:35				military and armor, popular car kit size
1:32	1"=2'-8"	3/8"=1'	0.01	#1 gauge for model railroad aircraft & figures
1:25	1"=2'-1"	.48"=1'		car & truck
1:24	1"=2'	1/2"=1'	0.01326	smaller doll houses, cars. trucks, & aircraft
1:22.4				Gauge 2 & G gauge for model railroad (LGB trains)
1:20.3				F gauge for model railroad & cars
1:18	1"=1'-6"'	2/3"=1'		plastic truck and car kits
1:16	1"=1'-4"	3/4"=1'	0.01989	car
1:12	1"=1'	1"=1'	0.02653	doll houses & cars
1:11.2				Gauge 1 for model railroad
1:8	1"=8"	1.5"=1'	0.03979	motorcycles

==============================================

SCALE CONVERSION CHART
By: Buddy McLaughlin

For example: at a scale of 1/4"=1' a fitting 3/4" (0.75) long on the ship will measure 1/64", or .016", or will be a #78 drill on the model.
See red highlight in the chart.

Dimension on model				Dimension on Full Sized Ship in Inches at a scale of:
Fraction (inch)	Drill Sizes	Decimal (inch)	Metric (mm)	1/8"=1' 1:96	3/16"=1' 1:64	1/4"=1' 1:48	3/8"=1' 1:32	1/2"=1' 1:24	3/4"=1' 1:16	1"=1' 1:12	1.5"=1' 1:8
1/256	---	0.004	0.10	0.38	0.25	0.19	0.13	0.09	0.06	0.05	0.03
1/128	---	0.008	0.20	0.75	0.50	0.38	0.25	0.19	0.13	0.09	0.06
	80	0.013	0.33	1.25	0.83	0.62	0.42	0.31	0.21	0.16	0.10
	79	0.014	0.36	1.34	0.90	0.67	0.45	0.34	0.22	0.17	0.11
1/64	78	0.016	0.40	1.50	1.00	0.75	0.50	0.38	0.25	0.19	0.13
	77	0.018	0.46	1.73	1.15	0.86	0.58	0.43	0.29	0.22	0.14
	76	0.020 Treenailer #1	0.51	1.92	1.28	0.96	0.64	0.48	0.32	0.24	0.16
	75	0.021	0.53	2.02	1.34	1.01	0.67	0.50	0.34	0.25	0.17
	74	0.022	0.56	2.11	1.41	1.06	0.70	0.53	0.35	0.26	0.18
	73	0.024	0.61	2.30	1.54	1.15	0.77	0.58	0.38	0.29	0.19
	72	0.025	0.64	2.40	1.60	1.20	0.80	0.60	0.40	0.30	0.20
	71	0.026 Treenailer #2	0.66	2.50	1.66	1.25	0.83	0.62	0.42	0.31	0.21
	70	0.028	0.71	2.69	1.79	1.34	0.90	0.67	0.45	0.34	0.22
	69	0.029	0.74	2.78	1.86	1.39	0.93	0.70	0.46	0.35	0.23
1/32	68	0.031 Treenailer #3	0.79	3.00	2.00	1.50	1.00	0.75	0.50	0.38	0.25
	67	0.032	0.81	3.07	2.05	1.54	1.02	0.77	0.51	0.38	0.26
	66	0.033	0.84	3.17	2.11	1.58	1.06	0.79	0.53	0.40	0.26
	65	0.035	0.89	3.36	2.24	1.68	1.12	0.84	0.56	0.42	0.28
	64	0.036	0.91	3.46	2.30	1.73	1.15	0.86	0.58	0.43	0.29
	63	0.037	0.94	3.55	2.37	1.78	1.18	0.89	0.59	0.44	0.30
	62	0.038 Treenailer #4	0.97	3.65	2.43	1.82	1.22	0.91	0.61	0.46	0.30
	61	0.039	1.00	3.78	2.52	1.89	1.26	0.94	0.63	0.47	0.31
1/16	52	0.063	1.59	6.00	4.00	3.00	2.00	1.50	1.00	0.75	0.50
	47	0.079	2.00	7.56	5.04	3.78	2.52	1.89	1.26	0.94	0.63
3/32	42	0.094	2.38	9.00	6.00	4.50	3.00	2.25	1.50	1.13	0.75
	---	0.118	3.00	11.34	7.56	5.67	3.78	2.83	1.89	1.42	0.94
1/8	---	0.125	3.18	12.00	8.00	6.00	4.00	3.00	2.00	1.50	1.00
5/32	---	0.156	3.97	15.00	10.00	7.50	5.00	3.75	2.50	1.88	1.25
	---	0.157	4.00	15.12	10.08	7.56	5.04	3.78	2.52	1.89	1.26
3/16	---	0.188	4.76	18.00	12.00	9.00	6.00	4.50	3.00	2.25	1.50
	---	0.197	5.00	18.90	12.60	9.45	6.30	4.72	3.15	2.36	1.57
7/32	---	0.219	5.56	21.00	14.00	10.50	7.00	5.25	3.50	2.63	1.75
	---	0.236	6.00	22.68	15.12	11.34	7.56	5.67	3.78	2.83	1.89
1/4	---	0.250	6.35	24.00	16.00	12.00	8.00	6.00	4.00	3.00	2.00
	---	0.276	7.00	26.46	17.64	13.23	8.82	6.61	4.41	3.31	2.20
9/32	---	0.281	7.14	27.00	18.00	13.50	9.00	6.75	4.50	3.38	2.25
5/16	---	0.313	7.94	30.00	20.00	15.00	10.00	7.50	5.00	3.75	2.50
	---	0.315	8.00	30.24	20.16	15.12	10.08	7.56	5.04	3.78	2.52
11/32	---	0.344	8.73	33.00	22.00	16.50	11.00	8.25	5.50	4.13	2.75
	---	0.354	9.00	34.02	22.68	17.01	11.34	8.50	5.67	4.25	2.83
3/8	---	0.375	9.53	36.00	24.00	18.00	12.00	9.00	6.00	4.50	3.00
	---	0.394	10.00	37.80	25.20	18.90	12.60	9.45	6.30	4.72	3.15
13/32	---	0.406	10.32	39.00	26.00	19.50	13.00	9.75	6.50	4.88	3.25
15/32	---	0.469	11.91	45.00	30.00	22.50	15.00	11.25	7.50	5.63	3.75
1/2	---	0.500	12.70	48.00	32.00	24.00	16.00	12.00	8.00	6.00	4.00
9/16	---	0.563	14.29	54.00	36.00	27.00	18.00	13.50	9.00	6.75	4.50
5/8	---	0.625	15.88	60.00	40.00	30.00	20.00	15.00	10.00	7.50	5.00
11/16	---	0.688	17.46	66.00	44.00	33.00	22.00	16.50	11.00	8.25	5.50
3/4	---	0.750	19.05	72.00	48.00	36.00	24.00	18.00	12.00	9.00	6.00
13/16	---	0.813	20.64	78.00	52.00	39.00	26.00	19.50	13.00	9.75	6.50
7/8	---	0.875	22.23	84.00	56.00	42.00	28.00	21.00	14.00	10.50	7.00
15/16	---	0.938	23.81	90.00	60.00	45.00	30.00	22.50	15.00	11.25	7.50
16/16	---	1.000	25.40	96.00	64.00	48.00	32.00	24.00	16.00	12.00	8.00

Treenailer (by permission) is a dowel cutter of various sizes, offered by Vanda-Lay Products.

===============================================================================

Actual Sizes in Fractional Inches
By Richard Strange

Actual Size	Actual Decimal Size (in.)	Scale 1/12"=1' (1:144) (in.)	Scale 1/10"=1' (1:120) (in.)	Scale 1/8"=1" (1:96) (in.)	Scale 1/6"=1' (1:72) (in.)	Scale 1/4"=1' (1:48) (in.)	Scale 3/8"=1' (1:32) (in.)	Scale 1/2"=1' (1:24) (in.)	Scale 3/4"=1' (1:16) (in.)	Scale 1"=1' (1:12) (in.)	Scale 2"=1' (1:6) (in.)
1/64	0.0156	2.25	1.875	1.5	1.125	0.75	0.5	0.375	0.25	0.188	0.094
1/32	0.0313	4.5	3.75	3	2.25	1.5	1	0.75	0.5	0.375	0.188
3/64	0.0469	6.75	5.625	4.5	3.375	2.25	1.5	1.125	0.75	0.563	0.281
1/16	0.0625	9	7.5	6	4.5	3	2	1.5	1	0.75	0.375
5/64	0.0781	11.25	9.375	7.5	5.625	3.75	2.5	1.875	1.25	0.938	0.469
3/32	0.0938	13.5	11.25	9	6.75	4.5	3	2.25	1.5	1.125	0.563
7/64	0.1094	15.75	13.125	10.5	7.875	5.25	3.5	2.625	1.75	1.313	0.656
1/8	0.1250	18	15	12	9	6	4	3	2	1.5	0.75
9/64	0.1406	20.25	16.875	13.5	10.125	6.75	4.5	3.375	2.25	1.688	0.844
5/32	0.1563	22.5	18.75	15	11.25	7.5	5	3.75	2.5	1.875	0.938
11/64	0.1719	24.75	20.625	16.5	12.375	8.25	5.5	4.125	2.75	2.063	1.031
3/16	0.1875	27	22.5	18	13.5	9	6	4.5	3	2.25	1.125
13/64	0.2031	29.25	24.375	19.5	14.625	9.75	6.5	4.875	3.25	2.438	1.219
7/32	0.2188	31.5	26.25	21	15.75	10.5	7	5.25	3.5	2.625	1.313
15/64	0.2344	33.75	28.125	22.5	16.875	11.25	7.5	5.625	3.75	2.813	1.406
1/4	0.2500	36	30	24	18	12	8	6	4	3	1.5
17/64	0.2656	38.25	31.875	25.5	19.125	12.75	8.5	6.375	4.25	3.188	1.594
9/32	0.2813	40.5	33.75	27	20.25	13.5	9	6.75	4.5	3.375	1.688
19/64	0.2969	42.75	35.625	28.5	21.375	14.25	9.5	7.125	4.75	3.563	1.781
5/16	0.3125	45	37.5	30	22.5	15	10	7.5	5	3.75	1.875
21/64	0.3281	47.25	39.375	31.5	23.625	15.75	10.5	7.875	5.25	3.938	1.969
11/32	0.3438	49.5	41.25	33	24.75	16.5	11	8.25	5.5	4.125	2.063
23/64	0.3594	51.75	43.125	34.5	25.875	17.25	11.5	8.625	5.75	4.313	2.156
3/8	0.3750	54	45	36	27	18	12	9	6	4.5	2.25
25/64	0.3906	56.25	46.875	37.5	28.125	18.75	12.5	9.375	6.25	4.688	2.344
13/32	0.4063	58.5	48.75	39	29.25	19.5	13	9.75	6.5	4.875	2.438
27/64	0.4219	60.75	50.625	40.5	30.375	20.25	13.5	10.125	6.75	5.063	2.531
7/16	0.4375	63	52.5	42	31.5	21	14	10.5	7	5.25	2.625
29/64	0.4531	65.25	54.375	43.5	32.625	21.75	14.5	10.875	7.25	5.438	2.719
15/32	0.4688	67.5	56.25	45	33.75	22.5	15	11.25	7.5	5.625	2.813
31/64	0.4844	69.75	58.125	46.5	34.875	23.25	15.5	11.625	7.75	5.813	2.906
1/2	0.5000	72	60	48	36	24	16	12	8	6	3
33/64	0.5156	74.25	61.875	49.5	37.125	24.75	16.5	12.375	8.25	6.188	3.094
17/32	0.5313	76.5	63.75	51	38.25	25.5	17	12.75	8.5	6.375	3.188
35/64	0.5469	78.75	65.625	52.5	39.375	26.25	17.5	13.125	8.75	6.563	3.281
9/16	0.5625	81	67.5	54	40.5	27	18	13.5	9	6.75	3.375
37/64	0.5781	83.25	69.375	55.5	41.625	27.75	18.5	13.875	9.25	6.938	3.469
19/32	0.5938	85.5	71.25	57	42.75	28.5	19	14.25	9.5	7.125	3.563
39/64	0.6094	87.75	73.125	58.5	43.875	29.25	19.5	14.625	9.75	7.313	3.656
5/8	0.6250	90	75	60	45	30	20	15	10	7.5	3.75
41/64	0.6406	92.25	76.875	61.5	46.125	30.75	20.5	15.375	10.25	7.688	3.844
21/32	0.6563	94.5	78.75	63	47.25	31.5	21	15.75	10.5	7.875	3.938
43/64	0.6719	96.75	80.625	64.5	48.375	32.25	21.5	16.125	10.75	8.063	4.031
11/16	0.6875	99	82.5	66	49.5	33	22	16.5	11	8.25	4.125
45/64	0.7031	101.25	84.375	67.5	50.625	33.75	22.5	16.875	11.25	8.438	4.219
23/32	0.7188	103.5	86.25	69	51.75	34.5	23	17.25	11.5	8.625	4.313
47/64	0.7344	105.75	88.125	70.5	52.875	35.25	23.5	17.625	11.75	8.813	4.406
3/4	0.7500	108	90	72	54	36	24	18	12	9	4.5
49/64	0.7656	110.25	91.875	73.5	55.125	36.75	24.5	18.375	12.25	9.188	4.594
25/32	0.7813	112.5	93.75	75	56.25	37.5	25	18.75	12.5	9.375	4.688
51/64	0.7969	114.75	95.625	76.5	57.375	38.25	25.5	19.125	12.75	9.563	4.781
13/16	0.8125	117	97.5	78	58.5	39	26	19.5	13	9.75	4.875
53/64	0.8281	119.25	99.375	79.5	59.625	39.75	26.5	19.875	13.25	9.938	4.969
27/32	0.8438	121.5	101.25	81	60.75	40.5	27	20.25	13.5	10.125	5.063
55/64	0.8594	123.75	103.125	82.5	61.875	41.25	27.5	20.625	13.75	10.313	5.156
7/8	0.8750	126	105	84	63	42	28	21	14	10.5	5.25
57/64	0.8906	128.25	106.875	85.5	64.125	42.75	28.5	21.375	14.25	10.688	5.344
29/32	0.9063	130.5	108.75	87	65.25	43.5	29	21.75	14.5	10.875	5.438
59/64	0.9219	132.75	110.625	88.5	66.375	44.25	29.5	22.125	14.75	11.063	5.531
15/16	0.9375	135	112.5	90	67.5	45	30	22.5	15	11.25	5.625
61/64	0.9531	137.25	114.375	91.5	68.625	45.75	30.5	22.875	15.25	11.438	5.719
31/32	0.9688	139.5	116.25	93	69.75	46.5	31	23.25	15.5	11.625	5.813
63/64	0.9844	141.75	118.125	94.5	70.875	47.25	31.5	23.625	15.75	11.813	5.906
1	1.0000	144	120	96	72	48	32	24	16	12	6

=======================================================

Actual Sizes in Metric Dimensions (mm)
By Richard Strange

Actual Size (mm)	Actual Decimal Size (in.)	Scale 1/12"=1' (1:144) (in.)	Scale 1/10"=1' (1:120) (in.)	Scale 1/8"=1" (1:96) (in.)	Scale 1/6"=1' (1:72) (in.)	Scale 1/4"=1' (1:48) (in.)	Scale 3/8"=1' (1:32) (in.)	Scale 1/2"=1' (1:24) (in.)	Scale 3/4"=1' (1:16) (in.)	Scale 1"=1' (1:12) (in.)	Scale 2"=1' (1:6) (in.)
0.1	0.0039	0.567	0.472	0.378	0.283	0.189	0.126	0.094	0.063	0.047	0.024
0.2	0.0079	1.134	0.945	0.756	0.567	0.378	0.252	0.189	0.126	0.094	0.047
0.3	0.0118	1.701	1.417	1.134	0.85	0.567	0.378	0.283	0.189	0.142	0.071
0.4	0.0157	2.268	1.89	1.512	1.134	0.756	0.504	0.378	0.252	0.189	0.094
0.5	0.0197	2.835	2.362	1.89	1.417	0.945	0.63	0.472	0.315	0.236	0.118
0.6	0.0236	3.402	2.835	2.268	1.701	1.134	0.756	0.567	0.378	0.283	0.142
0.7	0.0276	3.969	3.307	2.646	1.984	1.323	0.882	0.661	0.441	0.331	0.165
0.8	0.0315	4.535	3.78	3.024	2.268	1.512	1.008	0.756	0.504	0.378	0.189
0.9	0.0354	5.102	4.252	3.402	2.551	1.701	1.134	0.85	0.567	0.425	0.213
1	0.0394	5.669	4.724	3.78	2.835	1.89	1.26	0.945	0.63	0.472	0.236
2	0.0787	11.339	9.449	7.559	5.669	3.78	2.52	1.89	1.26	0.945	0.472
3	0.1181	17.008	14.173	11.339	8.504	5.669	3.78	2.835	1.89	1.417	0.709
4	0.1575	22.677	18.898	15.118	11.339	7.559	5.039	3.78	2.52	1.89	0.945
5	0.1969	28.346	23.622	18.898	14.173	9.449	6.299	4.724	3.15	2.362	1.181
6	0.2362	34.016	28.346	22.677	17.008	11.339	7.559	5.669	3.78	2.835	1.417
7	0.2756	39.685	33.071	26.457	19.843	13.228	8.819	6.614	4.409	3.307	1.654
8	0.3150	45.354	37.795	30.236	22.677	15.118	10.079	7.559	5.039	3.78	1.89
9	0.3543	51.024	42.52	34.016	25.512	17.008	11.339	8.504	5.669	4.252	2.126
10	0.3937	56.693	47.244	37.795	28.346	18.898	12.598	9.449	6.299	4.724	2.362
11	0.4331	62.362	51.969	41.575	31.181	20.787	13.858	10.394	6.929	5.197	2.598
12	0.4724	68.031	56.693	45.354	34.016	22.677	15.118	11.339	7.559	5.669	2.835
13	0.5118	73.701	61.417	49.134	36.85	24.567	16.378	12.283	8.189	6.142	3.071
14	0.5512	79.37	66.142	52.913	39.685	26.457	17.638	13.228	8.819	6.614	3.307
15	0.5906	85.039	70.866	56.693	42.52	28.346	18.898	14.173	9.449	7.087	3.543
16	0.6299	90.709	75.591	60.472	45.354	30.236	20.157	15.118	10.079	7.559	3.78
17	0.6693	96.378	80.315	64.252	48.189	32.126	21.417	16.063	10.709	8.031	4.016
18	0.7087	102.047	85.039	68.031	51.024	34.016	22.677	17.008	11.339	8.504	4.252
19	0.7480	107.717	89.764	71.811	53.858	35.906	23.937	17.953	11.969	8.976	4.488
20	0.7874	113.386	94.488	75.591	56.693	37.795	25.197	18.898	12.598	9.449	4.724
21	0.8268	119.055	99.213	79.37	59.528	39.685	26.457	19.843	13.228	9.921	4.961
22	0.8661	124.724	103.937	83.15	62.362	41.575	27.717	20.787	13.858	10.394	5.197
23	0.9055	130.394	108.661	86.929	65.197	43.465	28.976	21.732	14.488	10.866	5.433
24	0.9449	136.063	113.386	90.709	68.031	45.354	30.236	22.677	15.118	11.339	5.669

===============================================

Actual Sizes in Standard Drill Sizes
By Richard Strange

Actual Size	Actual Decimal Size (in.)	Scale 1/12"=1' (1:144) (in.)	Scale 1/10"=1' (1:120) (in.)	Scale 1/8"=1" (1:96) (in.)	Scale 1/6"=1' (1:72) (in.)	Scale 1/4"=1' (1:48) (in.)	Scale 3/8"=1' (1:32) (in.)	Scale 1/2"=1' (1:24) (in.)	Scale 3/4"=1' (1:16) (in.)	Scale 1"=1' (1:12) (in.)	Scale 2"=1' (1:6) (in.)
1	0.2280	32.832	27.36	21.888	16.416	10.944	7.296	5.472	3.648	2.736	1.368
2	0.2210	31.824	26.52	21.216	15.912	10.608	7.072	5.304	3.536	2.652	1.326
3	0.2130	30.672	25.56	20.448	15.336	10.224	6.816	5.112	3.408	2.556	1.278
4	0.2090	30.096	25.08	20.064	15.048	10.032	6.688	5.016	3.344	2.508	1.254
5	0.2055	29.592	24.66	19.728	14.796	9.864	6.576	4.932	3.288	2.466	1.233
6	0.2040	29.376	24.48	19.584	14.688	9.792	6.528	4.896	3.264	2.448	1.224
7	0.2010	28.944	24.12	19.296	14.472	9.648	6.432	4.824	3.216	2.412	1.206
8	0.1990	28.656	23.88	19.104	14.328	9.552	6.368	4.776	3.184	2.388	1.194
9	0.1960	28.224	23.52	18.816	14.112	9.408	6.272	4.704	3.136	2.352	1.176
10	0.1935	27.864	23.22	18.576	13.932	9.288	6.192	4.644	3.096	2.322	1.161
11	0.1910	27.504	22.92	18.336	13.752	9.168	6.112	4.584	3.056	2.292	1.146
12	0.1890	27.216	22.68	18.144	13.608	9.072	6.048	4.536	3.024	2.268	1.134
13	0.1850	26.64	22.2	17.76	13.32	8.88	5.92	4.44	2.96	2.22	1.11
14	0.1820	26.208	21.84	17.472	13.104	8.736	5.824	4.368	2.912	2.184	1.092
15	0.1800	25.92	21.6	17.28	12.96	8.64	5.76	4.32	2.88	2.16	1.08
16	0.1770	25.488	21.24	16.992	12.744	8.496	5.664	4.248	2.832	2.124	1.062
17	0.1730	24.912	20.76	16.608	12.456	8.304	5.536	4.152	2.768	2.076	1.038
18	0.1695	24.408	20.34	16.272	12.204	8.136	5.424	4.068	2.712	2.034	1.017
19	0.1660	23.904	19.92	15.936	11.952	7.968	5.312	3.984	2.656	1.992	0.996
20	0.1610	23.184	19.32	15.456	11.592	7.728	5.152	3.864	2.576	1.932	0.966
21	0.1590	22.896	19.08	15.264	11.448	7.632	5.088	3.816	2.544	1.908	0.954
22	0.1570	22.608	18.84	15.072	11.304	7.536	5.024	3.768	2.512	1.884	0.942
23	0.1540	22.176	18.48	14.784	11.088	7.392	4.928	3.696	2.464	1.848	0.924
24	0.1520	21.888	18.24	14.592	10.944	7.296	4.864	3.648	2.432	1.824	0.912
25	0.1495	21.528	17.94	14.352	10.764	7.176	4.784	3.588	2.392	1.794	0.897
26	0.1470	21.168	17.64	14.112	10.584	7.056	4.704	3.528	2.352	1.764	0.882
27	0.1440	20.736	17.28	13.824	10.368	6.912	4.608	3.456	2.304	1.728	0.864
28	0.1405	20.232	16.86	13.488	10.116	6.744	4.496	3.372	2.248	1.686	0.843
29	0.1360	19.584	16.32	13.056	9.792	6.528	4.352	3.264	2.176	1.632	0.816
30	0.1285	18.504	15.42	12.336	9.252	6.168	4.112	3.084	2.056	1.542	0.771
31	0.1200	17.28	14.4	11.52	8.64	5.76	3.84	2.88	1.92	1.44	0.72
32	0.1160	16.704	13.92	11.136	8.352	5.568	3.712	2.784	1.856	1.392	0.696
33	0.1130	16.272	13.56	10.848	8.136	5.424	3.616	2.712	1.808	1.356	0.678
34	0.1110	15.984	13.32	10.656	7.992	5.328	3.552	2.664	1.776	1.332	0.666
35	0.1100	15.84	13.2	10.56	7.92	5.28	3.52	2.64	1.76	1.32	0.66
36	0.1065	15.336	12.78	10.224	7.668	5.112	3.408	2.556	1.704	1.278	0.639
37	0.1040	14.976	12.48	9.984	7.488	4.992	3.328	2.496	1.664	1.248	0.624
38	0.1015	14.616	12.18	9.744	7.308	4.872	3.248	2.436	1.624	1.218	0.609
39	0.0995	14.328	11.94	9.552	7.164	4.776	3.184	2.388	1.592	1.194	0.597
40	0.0980	14.112	11.76	9.408	7.056	4.704	3.136	2.352	1.568	1.176	0.588
41	0.0960	13.824	11.52	9.216	6.912	4.608	3.072	2.304	1.536	1.152	0.576
42	0.0935	13.464	11.22	8.976	6.732	4.488	2.992	2.244	1.496	1.122	0.561
43	0.0890	12.816	10.68	8.544	6.408	4.272	2.848	2.136	1.424	1.068	0.534
44	0.0860	12.384	10.32	8.256	6.192	4.128	2.752	2.064	1.376	1.032	0.516
45	0.0820	11.808	9.84	7.872	5.904	3.936	2.624	1.968	1.312	0.984	0.492
46	0.0810	11.664	9.72	7.776	5.832	3.888	2.592	1.944	1.296	0.972	0.486
47	0.0785	11.304	9.42	7.536	5.652	3.768	2.512	1.884	1.256	0.942	0.471
48	0.0760	10.944	9.12	7.296	5.472	3.648	2.432	1.824	1.216	0.912	0.456
49	0.0730	10.512	8.76	7.008	5.256	3.504	2.336	1.752	1.168	0.876	0.438
50	0.0700	10.08	8.4	6.72	5.04	3.36	2.24	1.68	1.12	0.84	0.42
51	0.0670	9.648	8.04	6.432	4.824	3.216	2.144	1.608	1.072	0.804	0.402
52	0.0635	9.144	7.62	6.096	4.572	3.048	2.032	1.524	1.016	0.762	0.381
53	0.0595	8.568	7.14	5.712	4.284	2.856	1.904	1.428	0.952	0.714	0.357
54	0.0550	7.92	6.6	5.28	3.96	2.64	1.76	1.32	0.88	0.66	0.33
55	0.0520	7.488	6.24	4.992	3.744	2.496	1.664	1.248	0.832	0.624	0.312
56	0.0465	6.696	5.58	4.464	3.348	2.232	1.488	1.116	0.744	0.558	0.279
57	0.0430	6.192	5.16	4.128	3.096	2.064	1.376	1.032	0.688	0.516	0.258
58	0.0420	6.048	5.04	4.032	3.024	2.016	1.344	1.008	0.672	0.504	0.252
59	0.0410	5.904	4.92	3.936	2.952	1.968	1.312	0.984	0.656	0.492	0.246
60	0.0400	5.76	4.8	3.84	2.88	1.92	1.28	0.96	0.64	0.48	0.24
61	0.0390	5.616	4.68	3.744	2.808	1.872	1.248	0.936	0.624	0.468	0.234
62	0.0380	5.472	4.56	3.648	2.736	1.824	1.216	0.912	0.608	0.456	0.228
63	0.0370	5.328	4.44	3.552	2.664	1.776	1.184	0.888	0.592	0.444	0.222
64	0.0360	5.184	4.32	3.456	2.592	1.728	1.152	0.864	0.576	0.432	0.216
65	0.0350	5.04	4.2	3.36	2.52	1.68	1.12	0.84	0.56	0.42	0.21
66	0.0330	4.752	3.96	3.168	2.376	1.584	1.056	0.792	0.528	0.396	0.198
67	0.0320	4.608	3.84	3.072	2.304	1.536	1.024	0.768	0.512	0.384	0.192
68	0.0310	4.464	3.72	2.976	2.232	1.488	0.992	0.744	0.496	0.372	0.186
69	0.0292	4.205	3.504	2.803	2.102	1.402	0.934	0.701	0.467	0.35	0.175
70	0.0280	4.032	3.36	2.688	2.016	1.344	0.896	0.672	0.448	0.336	0.168
71	0.0260	3.744	3.12	2.496	1.872	1.248	0.832	0.624	0.416	0.312	0.156
72	0.0250	3.6	3	2.4	1.8	1.2	0.8	0.6	0.4	0.3	0.15
73	0.0240	3.456	2.88	2.304	1.728	1.152	0.768	0.576	0.384	0.288	0.144
74	0.0225	3.24	2.7	2.16	1.62	1.08	0.72	0.54	0.36	0.27	0.135
75	0.0210	3.024	2.52	2.016	1.512	1.008	0.672	0.504	0.336	0.252	0.126
76	0.0200	2.88	2.4	1.92	1.44	0.96	0.64	0.48	0.32	0.24	0.12
77	0.0180	2.592	2.16	1.728	1.296	0.864	0.576	0.432	0.288	0.216	0.108
78	0.0160	2.304	1.92	1.536	1.152	0.768	0.512	0.384	0.256	0.192	0.096
79	0.0145	2.088	1.74	1.392	1.044	0.696	0.464	0.348	0.232	0.174	0.087
80	0.0135	1.944	1.62	1.296	0.972	0.648	0.432	0.324	0.216	0.162	0.081
81	0.0130	1.872	1.56	1.248	0.936	0.624	0.416	0.312	0.208	0.156	0.078
82	0.0125	1.8	1.5	1.2	0.9	0.6	0.4	0.3	0.2	0.15	0.075
83	0.0120	1.728	1.44	1.152	0.864	0.576	0.384	0.288	0.192	0.144	0.072
84	0.0115	1.656	1.38	1.104	0.828	0.552	0.368	0.276	0.184	0.138	0.069
85	0.0110	1.584	1.32	1.056	0.792	0.528	0.352	0.264	0.176	0.132	0.066
86	0.0105	1.512	1.26	1.008	0.756	0.504	0.336	0.252	0.168	0.126	0.063
87	0.0100	1.44	1.2	0.96	0.72	0.48	0.32	0.24	0.16	0.12	0.06
88	0.0095	1.368	1.14	0.912	0.684	0.456	0.304	0.228	0.152	0.114	0.057
89	0.0091	1.31	1.092	0.874	0.655	0.437	0.291	0.218	0.146	0.109	0.055
90	0.0087	1.253	1.044	0.835	0.626	0.418	0.278	0.209	0.139	0.104	0.052

===============================================

Actual Sizes in United States Steel Wire Gage
By Richard Strange

Actual Size	Actual Decimal Size (in.)	Scale 1/12"=1' (1:144) (in.)	Scale 1/10"=1' (1:120) (in.)	Scale 1/8"=1" (1:96) (in.)	Scale 1/6"=1' (1:72) (in.)	Scale 1/4"=1' (1:48) (in.)	Scale 3/8"=1' (1:32) (in.)	Scale 1/2"=1' (1:24) (in.)	Scale 3/4"=1' (1:16) (in.)	Scale 1"=1' (1:12) (in.)	Scale 2"=1' (1:6) (in.)
0000000	0.4900	70.56	58.8	47.04	35.28	23.52	15.68	11.76	7.84	5.88	2.94
000000	0.4615	66.456	55.38	44.304	33.228	22.152	14.768	11.076	7.384	5.538	2.769
00000	0.4305	61.992	51.66	41.328	30.996	20.664	13.776	10.332	6.888	5.166	2.583
0000	0.3938	56.707	47.256	37.805	28.354	18.902	12.602	9.451	6.301	4.726	2.363
000	0.3625	52.2	43.5	34.8	26.1	17.4	11.6	8.7	5.8	4.35	2.175
00	0.3310	47.664	39.72	31.776	23.832	15.888	10.592	7.944	5.296	3.972	1.986
0	0.3065	44.136	36.78	29.424	22.068	14.712	9.808	7.356	4.904	3.678	1.839
1	0.2830	40.752	33.96	27.168	20.376	13.584	9.056	6.792	4.528	3.396	1.698
2	0.2625	37.8	31.5	25.2	18.9	12.6	8.4	6.3	4.2	3.15	1.575
3	0.2437	35.093	29.244	23.395	17.546	11.698	7.798	5.849	3.899	2.924	1.462
4	0.2253	32.443	27.036	21.629	16.222	10.814	7.21	5.407	3.605	2.704	1.352
5	0.2070	29.808	24.84	19.872	14.904	9.936	6.624	4.968	3.312	2.484	1.242
6	0.1920	27.648	23.04	18.432	13.824	9.216	6.144	4.608	3.072	2.304	1.152
7	0.1770	25.488	21.24	16.992	12.744	8.496	5.664	4.248	2.832	2.124	1.062
8	0.1620	23.328	19.44	15.552	11.664	7.776	5.184	3.888	2.592	1.944	0.972
9	0.1483	21.355	17.796	14.237	10.678	7.118	4.746	3.559	2.373	1.78	0.89
10	0.1350	19.44	16.2	12.96	9.72	6.48	4.32	3.24	2.16	1.62	0.81
11	0.1205	17.352	14.46	11.568	8.676	5.784	3.856	2.892	1.928	1.446	0.723
12	0.1055	15.192	12.66	10.128	7.596	5.064	3.376	2.532	1.688	1.266	0.633
13	0.0915	13.176	10.98	8.784	6.588	4.392	2.928	2.196	1.464	1.098	0.549
14	0.0800	11.52	9.6	7.68	5.76	3.84	2.56	1.92	1.28	0.96	0.48
15	0.0720	10.368	8.64	6.912	5.184	3.456	2.304	1.728	1.152	0.864	0.432
16	0.0625	9	7.5	6	4.5	3	2	1.5	1	0.75	0.375
17	0.0540	7.776	6.48	5.184	3.888	2.592	1.728	1.296	0.864	0.648	0.324
18	0.0475	6.84	5.7	4.56	3.42	2.28	1.52	1.14	0.76	0.57	0.285
19	0.0410	5.904	4.92	3.936	2.952	1.968	1.312	0.984	0.656	0.492	0.246
20	0.0348	5.011	4.176	3.341	2.506	1.67	1.114	0.835	0.557	0.418	0.209
21	0.0317	4.565	3.804	3.043	2.282	1.522	1.014	0.761	0.507	0.38	0.19
22	0.0286	4.118	3.432	2.746	2.059	1.373	0.915	0.686	0.458	0.343	0.172
23	0.0258	3.715	3.096	2.477	1.858	1.238	0.826	0.619	0.413	0.31	0.155
24	0.0230	3.312	2.76	2.208	1.656	1.104	0.736	0.552	0.368	0.276	0.138
25	0.0204	2.938	2.448	1.958	1.469	0.979	0.653	0.49	0.326	0.245	0.122
26	0.0181	2.606	2.172	1.738	1.303	0.869	0.579	0.434	0.29	0.217	0.109
27	0.0173	2.491	2.076	1.661	1.246	0.83	0.554	0.415	0.277	0.208	0.104
28	0.0162	2.333	1.944	1.555	1.166	0.778	0.518	0.389	0.259	0.194	0.097
29	0.0150	2.16	1.8	1.44	1.08	0.72	0.48	0.36	0.24	0.18	0.09
30	0.0140	2.016	1.68	1.344	1.008	0.672	0.448	0.336	0.224	0.168	0.084
31	0.0132	1.901	1.584	1.267	0.95	0.634	0.422	0.317	0.211	0.158	0.079
32	0.0128	1.843	1.536	1.229	0.922	0.614	0.41	0.307	0.205	0.154	0.077
33	0.0118	1.699	1.416	1.133	0.85	0.566	0.378	0.283	0.189	0.142	0.071
34	0.0104	1.498	1.248	0.998	0.749	0.499	0.333	0.25	0.166	0.125	0.062
35	0.0095	1.368	1.14	0.912	0.684	0.456	0.304	0.228	0.152	0.114	0.057
36	0.0090	1.296	1.08	0.864	0.648	0.432	0.288	0.216	0.144	0.108	0.054
37	0.0085	1.224	1.02	0.816	0.612	0.408	0.272	0.204	0.136	0.102	0.051
38	0.0080	1.152	0.96	0.768	0.576	0.384	0.256	0.192	0.128	0.096	0.048
39	0.0075	1.08	0.9	0.72	0.54	0.36	0.24	0.18	0.12	0.09	0.045
40	0.0070	1.008	0.84	0.672	0.504	0.336	0.224	0.168	0.112	0.084	0.042

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