Foot-lamberts to Stilbs Converter
Quick answer: To convert foot-lamberts to stilbs, multiply by 0.0003426259. For example, 10 fL is 0.003426259 sb. One foot-lambert equals 0.0003426259 sb.
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Use the Foot-lamberts to Stilbs Converter
Foot-lamberts to Stilbs formula and what each symbol means
sb = fL × 0.0003426259
| Symbol | Meaning |
|---|---|
| fL | Foot-lambert |
| sb | Stilb |
Foot-lamberts to Stilbs examples
1 fL
1 fL × 0.0003426259 = 0.0003426259 sb.
10 fL
10 fL × 0.0003426259 = 0.003426259 sb.
100 fL
100 fL × 0.0003426259 = 0.03426259 sb.
Foot-lamberts compared with Stilbs
One sb is 2,919 times as large as one fL, so your number gets smaller when you convert foot-lamberts to stilbs and bigger when you convert back. If the answer is not smaller than what you typed, you multiplied instead of dividing.
About foot-lamberts and stilbs
Foot-lambert (fL): The foot-lambert, about 3.4263 cd/m². Stilb (sb): The stilb, 10,000 cd/m².
How to calculate Foot-lamberts to Stilbs step by step
- Enter the value in fL (the starting unit).
- Multiply by 0.0003426259, because 1 fL = 0.0003426259 sb.
- The product is the value in sb. To go back, divide by 0.0003426259 or multiply by 2,918.635.
Popular luminance conversions
How to read your Foot-lamberts to Stilbs result
Quick estimate: multiply by about 0.00034 to get stilbs from foot-lamberts; this is within 0.8% of the exact factor. One stilb is 10,000 cd/m² and one foot-lambert is about 3.4263 cd/m².
| FOOT-LAMBERTS | STILBS |
|---|---|
| 1 | 0.0003426259 |
| 2 | 0.0006852518 |
| 5 | 0.00171313 |
| 10 | 0.003426259 |
| 20 | 0.006852518 |
| 50 | 0.0171313 |
| 100 | 0.03426259 |
| 1,000 | 0.3426259 |
Stilbs to Foot-lamberts: quick table
| STILBS | FOOT-LAMBERTS |
|---|---|
| 1 | 2,918.635 |
| 5 | 14,593.18 |
| 10 | 29,186.35 |
| 25 | 72,965.88 |
| 50 | 145,931.8 |
| 100 | 291,863.5 |
| 250 | 729,658.8 |
| 500 | 1,459,318 |
Common mistakes when calculating Foot-lamberts to Stilbs
- Mixing cd/ft² with cd/m²: the first is 10.764 times larger.
- Dividing when you should multiply: from fL to sb multiply by 0.0003426259; from sb to fL divide by 0.0003426259.
Foot-lamberts to Stilbs FAQ
How many sb are in 1 fL?
1 fL equals 0.0003426259 sb.
How many fL are in 1 sb?
1 sb equals 2,918.635 fL.
Is 1 fL = 0.0003426259 sb an exact conversion?
The factor is shown rounded to 7 significant figures (0.0003426259). The calculator above uses more digits.
What is a foot-lambert (fL)?
The foot-lambert, about 3.4263 cd/m².
How can I estimate foot-lamberts to stilbs in my head?
Quick estimate: multiply by about 0.00034 to get stilbs from foot-lamberts; this is within 0.8% of the exact factor.
What is 250 fL in stilbs?
250 fL = 0.08565648 sb (since 250 × 0.0003426259).
What is 7 fL in stilbs?
7 fL = 0.002398381 sb (since 7 × 0.0003426259).
What is 40 fL in stilbs?
40 fL = 0.01370504 sb (since 40 × 0.0003426259).
How many decimals should I keep when converting fL to sb?
Match the precision of your original measurement. For example, 0.003426259 sb rounds to 0.00343 sb at 3 significant figures; keep more digits only for engineering or scientific work.
More in Luminance converters
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- Candelas per square foot to Foot-lamberts Converter
- Candelas per square foot to Stilbs Converter
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Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors, BIPM: the International System of Units (SI)