Convert Apostilb to Foot-lambert
Input the number of apostilbs you want to convert to foot-lamberts.
How to Convert Apostilbs to Foot-lamberts
The apostilb and foot-lambert are both units of luminance. 1 foot-lambert equals 10.763910416 apostilbs. This means to convert apostilbs to foot-lamberts, you divide by 10.763910416.
Formula
Step-by-Step Example
Convert 5 asb to foot-lamberts:
We need to convert apostilbs to foot-lamberts
Since 1 fL = 10.763910416 asb, divide by 10.763910416
5 ÷ 10.763910416 = 0.4645152
5 asb = 0.4645152 fL
Apostilb to Foot-lambert Conversion Table
Quick reference table for common apostilb to foot-lambert conversions. Click any value for detailed calculation.
| Apostilbs (asb) | Foot-lamberts (fL) |
|---|---|
| 1 asb | 0.09290304 fL |
| 2 asb | 0.18580608 fL |
| 5 asb | 0.4645152 fL |
| 10 asb | 0.9290304001 fL |
| 15 asb | 1.3935456001 fL |
| 20 asb | 1.8580608001 fL |
| 25 asb | 2.3225760001 fL |
| 50 asb | 4.6451520003 fL |
| 100 asb | 9.2903040006 fL |
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.
Foot-lambert (fL)
The foot-lambert (fL) equals 1/π candela per square foot ≈ 3.43 nits. The US cinema projection standard: movie theater screen 12-22 fL, IMAX 22 fL minimum, drive-in 4-8 fL. Also used in flight simulator displays and military cockpit specifications.
Frequently Asked Questions
How do I convert apostilbs to foot-lamberts?
To convert apostilbs to foot-lamberts, divide the value by 10.763910416. For example, 10 asb = 0.9290304001 fL.
How many foot-lamberts are in 1 apostilb?
1 apostilb equals 0.09290304 foot-lamberts.
What is the formula for apostilbs to foot-lamberts?
The formula is: fL = asb ÷ 10.763910416.