Stilb to Foot-lamberts Converter
Enter a luminance value in stilb and get the equivalent in foot-lamberts instantly. 1 sb ≈ 2,918.635 fL.
Use the Stilb to Foot-lamberts Converter
Stilb to Foot-Lamberts Converter
Please enter a valid non-negative number.
Foot-Lamberts (fL)
fL
1 sb ≈ 2,918.635 fL
Nits (cd/m²)
nt
× 10,000
cd/m²
cd/m²
= nits (1:1)
Enter a stilb value above to see the foot-lambert equivalent.
foot-lamberts: value × (π × 929.0304)
nits (cd/m²): value × 10,000
Common Luminance Reference Values
| Source / Display | Stilb (sb) | Foot-L (fL) |
|---|
Click any row to load that value into the converter.
Summary
The stilb (sb) is a CGS unit of luminance equal to 1 candela per square centimeter (cd/cm²). The foot-lambert (fL) is a non-SI unit used for projector and cinema-screen luminance. Since 1 square foot = 929.0304 cm² and 1 foot-lambert = 1/π cd/ft², 1 stilb equals π × 929.0304 ≈ 2,918.635 foot-lamberts. The converter also shows nits (cd/m²).
How it works
- Enter any luminance value in stilb (sb) in the input field.
- The converter multiplies the stilb value by π × 929.0304 to compute foot-lamberts (1 sb ≈ 2,918.635 fL).
- Nits (cd/m²) are calculated by multiplying stilb by 10,000 (1 sb = 10,000 cd/m²).
- All results update instantly as you type; no server call is made.
- Click any row in the reference table to load that luminance value into the converter.
Use cases
- Convert CGS stilb values from older photometric tables into foot-lamberts for cinema projector specs.
- Translate stilb-based luminance data from legacy scientific papers into fL for theater brightness standards.
- Cross-check laboratory measurements in stilb against foot-lambert-rated projection screens.
- Verify unit conversions when writing technical reports that mix CGS and US customary photometric units.
- Convert historical photometric data in stilb to foot-lamberts for archival digitization projects.
Frequently Asked Questions
Last updated: 2026-07-14 · Reviewed by Nham Vu