Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Foot-lamberts to Candelas per square metre
Convert fL to cd/m² instantly, then review the formula, assumptions, and rounding guidance.
Light & sound unitsInstant result
Decimals
Formula result = input × 3.4262590996 ÷ 1. 1 fL = 3.4263 cd/m²
Common examples
One value, several units
Candelas per square metre3.4263 cd/m²
Nits3.4263 nt
Stilbs0.0003 sb
Conversion table
| fL | cd/m² |
|---|---|
| 1 fL | 3.4263 cd/m² |
| 2 fL | 6.8525 cd/m² |
| 5 fL | 17.1313 cd/m² |
| 10 fL | 34.2626 cd/m² |
| 25 fL | 85.6565 cd/m² |
| 50 fL | 171.313 cd/m² |
| 100 fL | 342.6259 cd/m² |
Conversion chart
1 fL3.4263 cd/m²
5 fL17.1313 cd/m²
10 fL34.2626 cd/m²
25 fL85.6565 cd/m²
50 fL171.313 cd/m²
Worked example
1 nit equals 1 cd/m².
Unit definition
Foot-lamberts (fL) One foot-lamberts equals 3.4262590996 candela per square metre.
Unit history
Foot-lamberts 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 fL to candela per square metre.
3. Convert the base value to cd/m² and apply your display precision.
Understand the result before using it
Foot-lamberts to Candelas per square metre converts a value measured in Foot-lamberts (fL) into the equivalent value in Candelas per square metre (cd/m²). 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 × 3.4262590996 ÷ 1
Assumptions
- Foot-lamberts and Candelas per square metre represent the same luminance quantity.
- The input is expressed in fL; the output is expressed in cd/m².
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 fL = 3.4262590996 cd/m². 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 fL measurement in a document that expects cd/m².
- Compare a foot-lamberts value with a value reported in candelas per square metre.
- Check the fL-to-cd/m² 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 Foot-lamberts to Candelas per square metre?
result = input × 3.4262590996 ÷ 1 Using the displayed relationship, 1 fL equals 3.4262590996 cd/m².
How many Candelas per square metre are in one Foot-lamberts?
One Foot-lamberts is 3.4262590996 Candelas per square metre. The displayed digits may be rounded.
Can I reverse the fL to cd/m² conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts cd/m² back to fL.
Is the Foot-lamberts to Candelas per square metre 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.