Luminance Unit Conversion Calculator

Candela/m² (cd/m²):

Nit (nt):

Lumens/m²/sr (lm/m²/sr):

Candela/cm² (cd/cm²):

Lumens/cm²/sr (lm/cm²/sr):

Stilb (sb):

Candela/ft² (cd/ft²):

Lumens/ft²/sr (lm/ft²/sr):

Apostilb (asb):

Lambert (L):

Foot-lambert (fL):

How to Convert Between Luminance Units

Use the following conversion factors for luminance units:

1 cd/m² = 1 nit = 1 lm/m²/sr
1 cd/m² = 10^-4 cd/cm² = 10^-4 lm/cm²/sr = 10^-4 stilb (sb)
1 cd/m² ≈ 0.09290 cd/ft² ≈ 0.09290 lm/ft²/sr
1 cd/m² = π apostilbs (asb)
1 cd/m² = π × 10^-4 lamberts (L)
1 cd/m² ≈ 0.2919 foot-lamberts (fL)

The calculator above automatically converts between all these units.

Conversion Tables

cd/m²	cd/cm²	Stilb (sb)	cd/ft²	Apostilb (asb)	Lambert (L)	Foot-lambert (fL)
1	0.000100	0.000100	0.092903	3.141593	0.000314	0.291864
2	0.000200	0.000200	0.185806	6.283185	0.000628	0.583727
3	0.000300	0.000300	0.278709	9.424778	0.000942	0.875591
4	0.000400	0.000400	0.371613	12.566371	0.001257	1.167454
5	0.000500	0.000500	0.464516	15.707963	0.001571	1.459318
6	0.000600	0.000600	0.557419	18.849556	0.001885	1.751181
7	0.000700	0.000700	0.650322	21.991149	0.002199	2.043045
8	0.000800	0.000800	0.743225	25.132741	0.002513	2.334908
9	0.000900	0.000900	0.836128	28.274334	0.002827	2.626772
10	0.001000	0.001000	0.929031	31.415927	0.003142	2.918635

cd/m²	cd/cm²	Stilb (sb)	cd/ft²	Apostilb (asb)	Lambert (L)	Foot-lambert (fL)
10	0.001000	0.001000	0.929031	31.415927	0.003142	2.918635
20	0.002000	0.002000	1.858063	62.831853	0.006283	5.837270
30	0.003000	0.003000	2.787094	94.247780	0.009425	8.755905
40	0.004000	0.004000	3.716125	125.663706	0.012566	11.674541
50	0.005000	0.005000	4.645156	157.079633	0.015708	14.593176
60	0.006000	0.006000	5.574188	188.495559	0.018850	17.511811
70	0.007000	0.007000	6.503219	219.911486	0.021991	20.430446
80	0.008000	0.008000	7.432250	251.327412	0.025133	23.349081
90	0.009000	0.009000	8.361282	282.743339	0.028274	26.267716
100	0.010000	0.010000	9.290313	314.159265	0.031416	29.186352

Using the Luminance Unit Conversion Calculator

This calculator helps you convert luminance measurements between different units including candela per square meter, nits, stilbs, apostilbs, lamberts, and foot-lamberts.

Steps to use:

Enter the luminance value in the input field.
Select the unit of your input value from the dropdown menu.
Click "Calculate" to get the results in all other units.

This tool is useful for display technology, lighting engineering, photometry, and any application where luminance measurements need to be converted between different unit systems.