Convert Apostilb to Lambert
Convert apostilbs to lamberts by entering a value below.
How to Convert Apostilbs to Lamberts
The apostilb and lambert are both units of luminance. By definition, 1 lambert equals exactly 10000 apostilbs. This means to convert apostilbs to lamberts, you divide by 10000.
Formula
Step-by-Step Example
Convert 5 asb to lamberts:
We need to convert apostilbs to lamberts
Since 1 L = 10000 asb, divide by 10000
5 ÷ 10000 = 0.0005
5 asb = 0.0005 L
Apostilb to Lambert Conversion Table
Quick reference table for common apostilb to lambert conversions. Click any value for detailed calculation.
| Apostilbs (asb) | Lamberts (L) |
|---|---|
| 0.1 asb | 1e-5 L |
| 0.5 asb | 5e-5 L |
| 1 asb | 0.0001 L |
| 2 asb | 0.0002 L |
| 5 asb | 0.0005 L |
| 10 asb | 0.001 L |
| 25 asb | 0.0025 L |
| 50 asb | 0.005 L |
| 100 asb | 0.01 L |
About These Units
Apostilb (asb)
The apostilb (asb) equals 1/π cd/m² ≈ 0.318 nits. Represents the luminance of a perfect diffuser illuminated by 1 lux. Also called blondel. One apostilb ≈ 0.0929 foot-lamberts. Useful in theoretical calculations involving diffuse reflection.
Lambert (L)
The lambert (L) equals 10,000/π cd/m² ≈ 3,183 nits. Named after mathematician Johann Lambert. A perfect diffuser with luminous exitance of 1 lumen/cm² has luminance of 1 lambert. Very bright—comparable to a projector screen in direct sunlight.
Frequently Asked Questions
How do I convert apostilbs to lamberts?
To convert apostilbs to lamberts, divide the value by 10000. For example, 10 asb = 0.001 L.
How many lamberts are in 1 apostilb?
1 apostilb equals 0.0001 lamberts.
What is the formula for apostilbs to lamberts?
The formula is: L = asb ÷ 10000.