Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Candelas per square metre to Foot-lamberts
Convert cd/m² to fL instantly, then review the formula, assumptions, and rounding guidance.
Light & sound unitsInstant result
Decimals
Formula result = input × 1 ÷ 3.4262590996. 1 cd/m² = 0.2919 fL
Common examples
One value, several units
Nits1 nt
Foot-lamberts0.2919 fL
Stilbs0.0001 sb
Conversion table
| cd/m² | fL |
|---|---|
| 1 cd/m² | 0.2919 fL |
| 2 cd/m² | 0.5837 fL |
| 5 cd/m² | 1.4593 fL |
| 10 cd/m² | 2.9186 fL |
| 25 cd/m² | 7.2966 fL |
| 50 cd/m² | 14.5932 fL |
| 100 cd/m² | 29.1864 fL |
Conversion chart
1 cd/m²0.2919 fL
5 cd/m²1.4593 fL
10 cd/m²2.9186 fL
25 cd/m²7.2966 fL
50 cd/m²14.5932 fL
Worked example
1 nit equals 1 cd/m².
Unit definition
Candelas per square metre (cd/m²) One candelas per square metre equals 1 candela per square metre.
Unit history
Candelas per square metre is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert cd/m² to candela per square metre.
3. Convert the base value to fL and apply your display precision.
Understand the result before using it
Candelas per square metre to Foot-lamberts converts a value measured in Candelas per square metre (cd/m²) into the equivalent value in Foot-lamberts (fL). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 1 ÷ 3.4262590996
Assumptions
- Candelas per square metre and Foot-lamberts represent the same luminance quantity.
- The input is expressed in cd/m²; the output is expressed in fL.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 cd/m² = 0.291863507963 fL. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a cd/m² measurement in a document that expects fL.
- Compare a candelas per square metre value with a value reported in foot-lamberts.
- Check the cd/m²-to-fL arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Decibel sound-pressure level is logarithmic and depends on the stated reference pressure.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert Candelas per square metre to Foot-lamberts?
result = input × 1 ÷ 3.4262590996 Using the displayed relationship, 1 cd/m² equals 0.291863507963 fL.
How many Foot-lamberts are in one Candelas per square metre?
One Candelas per square metre is 0.291863507963 Foot-lamberts. The displayed digits may be rounded.
Can I reverse the cd/m² to fL conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts fL back to cd/m².
Is the Candelas per square metre to Foot-lamberts result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.