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Proportion Wheel

Proportion Wheel Instructions

Functions just like a traditional proportion wheel! Fill in the original dimensions (width and height) and either the reproduction width or reproduction height and click Calculate to receive the final reproduction dimension and the reproduction percentage, or fill in the original dimensions (width and height) and the reproduction percentage and click Calculate to receive the reproduction width and reproduction height.

Percentage Calculator

Percentage Calculator is a free online tool to calculate percentages.

Tips: Use tab to move to the next field. Use shift-tab to move to the previous field. Press enter to calculate.

Select the best letter size for your sign

There are two primary factors that determine the best letter size for your sign: distance and speed. Our Letter Sizing Calculator simplifies the math for you.

Distance: Enter the viewing distance (how far away you want your sign to be readable). Our calculator will calculate the minimum readable letter size. It will also provide the recommended letter size for readability.

Letter Size

How far can you read a 4” tall letter? Or any other size letter for that matter? To find out the answer, just select the letter size from the dropdown list bellow.

Select Letter Size

Maximum Viewable Distance: ?? ft

Distance for Easy Readability: ?? ft

Distance

All you do is put in the viewing distance. And the calculator will automatically show you how big your letters should be.

Distance in Feet

Minimum Readable Letter Size: ?? inches

Recommended for Easy Readability: ?? inches

State Purchasing Contracts

The latest accessibility guidelines (e.g., WCAG 2.0 1.4.3) require that text (and images of text) provide adequate contrast for people who have visual impairments. Contrast is measured using a formula that gives a ratio ranging from 1:1 (no contrast, e.g., black text on a black background) to 21:1 (maximum contrast, e.g., black text on a white background). Using this formula, the requirements are:

3:1 - minimum contrast for "large scale" text (18 pt or 14 pt bold, or larger) under WCAG 2.0 1.4.3 (Level AA)
4.5:1 - minimum contrast for regular sized text under WCAG 2.0 1.4.3 (Level AA)
7:1 - "enhanced" contrast for regular sized text under WCAG 2.0 1.4.6 (Level AAA)

Samples

Color		Against White			Against Black
Value	Sample	Ratio	Normal	Large	Ratio	Normal	Large
#000	#000	21	AAA	AAA	1
#300	#300	18.4	AAA	AAA	1.1
#330	#330	13	AAA	AAA	1.6
#030	#030	14.3	AAA	AAA	1.5
#033	#033	13.8	AAA	AAA	1.5
#003	#003	20	AAA	AAA	1
#303	#303	17.7	AAA	AAA	1.2
#600	#600	13.4	AAA	AAA	1.6
#630	#630	10.3	AAA	AAA	2
#660	#660	6.1	AA	AAA	3.5		AA
#360	#360	6.9	AA	AAA	3		AA
#060	#060	7.2	AAA	AAA	2.9
#063	#063	7.1	AAA	AAA	2.9
#066	#066	6.8	AA	AAA	3.1		AA
#036	#036	12.6	AAA	AAA	1.7
#006	#006	17.6	AAA	AAA	1.2
#306	#306	15.8	AAA	AAA	1.3
#606	#606	12	AAA	AAA	1.8
#603	#603	13	AAA	AAA	1.6
#900	#900	8.9	AAA	AAA	2.4
#930	#930	7.4	AAA	AAA	2.8
#960	#960	4.9	AA	AAA	4.3		AA
#990	#990	3		AA	6.9	AA	AAA
#690	#690	3.4		AA	6.1	AA	AAA
#390	#390	3.7		AA	5.7	AA	AAA
#090	#090	3.8		AA	5.6	AA	AAA
#093	#093	3.7		AA	5.6	AA	AAA
#096	#096	3.7		AA	5.7	AA	AAA
#099	#099	3.5		AA	6	AA	AAA
#069	#069	6.2	AA	AAA	3.4		AA
#039	#039	10.9	AAA	AAA	1.9
#009	#009	14.4	AAA	AAA	1.5
#309	#309	13.1	AAA	AAA	1.6
#609	#609	10.4	AAA	AAA	2
#909	#909	7.5	AAA	AAA	2.8
#906	#906	8.2	AAA	AAA	2.5
#903	#903	8.7	AAA	AAA	2.4
#c00	#c00	5.9	AA	AAA	3.6		AA
#c30	#c30	5.2	AA	AAA	4		AA
#c60	#c60	3.8		AA	5.5	AA	AAA
#c90	#c90	2.6			8.1	AAA	AAA
#cc0	#cc0	1.7			12.2	AAA	AAA
#9c0	#9c0	1.9			11	AAA	AAA
#6c0	#6c0	2.1			10.2	AAA	AAA
#3c0	#3c0	2.1			9.8	AAA	AAA
#0c0	#0c0	2.2			9.6	AAA	AAA
#0c3	#0c3	2.2			9.7	AAA	AAA
#0c6	#0c6	2.1			9.8	AAA	AAA
#0c9	#0c9	2.1			10.1	AAA	AAA
#0cc	#0cc	2			10.5	AAA	AAA
#09c	#09c	3.3		AA	6.4	AA	AAA
#06c	#06c	5.6	AA	AAA	3.8		AA
#03c	#03c	9	AAA	AAA	2.3
#00c	#00c	11.2	AAA	AAA	1.9
#30c	#30c	10.4	AAA	AAA	2
#60c	#60c	8.6	AAA	AAA	2.4
#90c	#90c	6.5	AA	AAA	3.2		AA
#c0c	#c0c	4.7	AA	AAA	4.4		AA
#c09	#c09	5.2	AA	AAA	4		AA
#c06	#c06	5.6	AA	AAA	3.8		AA
#c03	#c03	5.8	AA	AAA	3.6		AA
#f00	#f00	4		AA	5.3	AA	AAA
#f30	#f30	3.7		AA	5.7	AA	AAA
#f60	#f60	2.9			7.2	AAA	AAA
#f90	#f90	2.1			9.8	AAA	AAA
#fc0	#fc0	1.5			13.9	AAA	AAA
#ff0	#ff0	1.1			19.6	AAA	AAA
#cf0	#cf0	1.2			17.9	AAA	AAA
#9f0	#9f0	1.3			16.7	AAA	AAA
#6f0	#6f0	1.3			15.9	AAA	AAA
#3f0	#3f0	1.4			15.4	AAA	AAA
#0f0	#0f0	1.4			15.3	AAA	AAA
#0f3	#0f3	1.4			15.4	AAA	AAA
#0f6	#0f6	1.4			15.5	AAA	AAA
#0f9	#0f9	1.3			15.8	AAA	AAA
#0fc	#0fc	1.3			16.2	AAA	AAA
#0ff	#0ff	1.3			16.7	AAA	AAA
#0cf	#0cf	1.9			11.1	AAA	AAA
#09f	#09f	3		AA	7	AAA	AAA
#06f	#06f	4.8	AA	AAA	4.3		AA
#03f	#03f	7.2	AAA	AAA	2.9
#00f	#00f	8.6	AAA	AAA	2.4
#30f	#30f	8.1	AAA	AAA	2.6
#60f	#60f	7	AAA	AAA	3		AA
#90f	#90f	5.5	AA	AAA	3.8		AA
#c0f	#c0f	4.2		AA	5	AA	AAA
#f0f	#f0f	3.1		AA	6.7	AA	AAA
#f0c	#f0c	3.4		AA	6.1	AA	AAA
#f09	#f09	3.7		AA	5.7	AA	AAA
#f06	#f06	3.9		AA	5.4	AA	AAA
#f03	#f03	4		AA	5.3	AA	AAA
#f33	#f33	3.6		AA	5.8	AA	AAA
#f63	#f63	2.9			7.2	AAA	AAA
#f93	#f93	2.1			9.9	AAA	AAA
#fc3	#fc3	1.5			13.9	AAA	AAA
#ff3	#ff3	1.1			19.6	AAA	AAA
#cf3	#cf3	1.2			17.9	AAA	AAA
#9f3	#9f3	1.3			16.7	AAA	AAA
#6f3	#6f3	1.3			15.9	AAA	AAA
#3f3	#3f3	1.4			15.5	AAA	AAA
#3f6	#3f6	1.3			15.6	AAA	AAA
#3f9	#3f9	1.3			15.9	AAA	AAA
#3fc	#3fc	1.3			16.3	AAA	AAA
#3ff	#3ff	1.2			16.9	AAA	AAA
#3cf	#3cf	1.9			11.2	AAA	AAA
#39f	#39f	2.9			7.1	AAA	AAA
#36f	#36f	4.7	AA	AAA	4.5	AA	AAA
#33f	#33f	6.9	AA	AAA	3.1		AA
#63f	#63f	6	AA	AAA	3.5		AA
#93f	#93f	4.9	AA	AAA	4.3		AA
#c3f	#c3f	3.8		AA	5.5	AA	AAA
#f3f	#f3f	2.9			7.2	AAA	AAA
#f3c	#f3c	3.2		AA	6.6	AA	AAA
#f39	#f39	3.4		AA	6.2	AA	AAA
#f36	#f36	3.5		AA	5.9	AA	AAA
#f66	#f66	2.9			7.3	AAA	AAA
#f96	#f96	2.1			10	AAA	AAA
#fc6	#fc6	1.5			14.1	AAA	AAA
#ff6	#ff6	1.1			19.7	AAA	AAA
#cf6	#cf6	1.2			18.1	AAA	AAA
#9f6	#9f6	1.2			16.9	AAA	AAA
#6f6	#6f6	1.3			16.1	AAA	AAA
#6f9	#6f9	1.3			16.3	AAA	AAA
#6fc	#6fc	1.3			16.7	AAA	AAA
#6ff	#6ff	1.2			17.3	AAA	AAA
#6cf	#6cf	1.8			11.6	AAA	AAA
#69f	#69f	2.8			7.6	AAA	AAA
#66f	#66f	4.3		AA	4.9	AA	AAA
#96f	#96f	3.7		AA	5.7	AA	AAA
#c6f	#c6f	3		AA	6.9	AA	AAA
#f6f	#f6f	2.4			8.6	AAA	AAA
#f6c	#f6c	2.6			8	AAA	AAA
#f69	#f69	2.8			7.6	AAA	AAA
#f99	#f99	2			10.3	AAA	AAA
#fc9	#fc9	1.5			14.3	AAA	AAA
#ff9	#ff9	1			20	AAA	AAA
#cf9	#cf9	1.1			18.3	AAA	AAA
#9f9	#9f9	1.2			17.1	AAA	AAA
#9fc	#9fc	1.2			17.5	AAA	AAA
#9ff	#9ff	1.2			18.1	AAA	AAA
#9cf	#9cf	1.7			12.4	AAA	AAA
#99f	#99f	2.5			8.4	AAA	AAA
#c9f	#c9f	2.2			9.6	AAA	AAA
#f9f	#f9f	1.9			11.3	AAA	AAA
#f9c	#f9c	2			10.7	AAA	AAA
#fcc	#fcc	1.4			14.8	AAA	AAA
#ffc	#ffc	1			20.4	AAA	AAA
#cfc	#cfc	1.1			18.7	AAA	AAA
#cff	#cff	1.1			19.3	AAA	AAA
#ccf	#ccf	1.5			13.6	AAA	AAA
#fcf	#fcf	1.4			15.3	AAA	AAA
#fff	#fff	1			21	AAA	AAA
#ccc	#ccc	1.6			13.1	AAA	AAA
#999	#999	2.8			7.4	AAA	AAA
#666	#666	5.7	AA	AAA	3.7		AA
#333	#333	12.6	AAA	AAA	1.7
#000	#000	21	AAA	AAA	1

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