Unit converter
Luminance converter
Convert luminance units including candela per square meter, nit, stilb, and foot-lambert.
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1 cd/m² = 1 nt
All Luminance units
From 1 cd/m²| Unit | Value |
|---|---|
| Candela per square meter cd/m² | 1 |
| Nit nt | 1 |
| Stilb sb | 0.0001 |
| Candela per square centimeter cd/cm² | 0.0001 |
| Candela per square foot cd/ft² | 0.0929030436 |
| Candela per square inch cd/in² | 0.00064516 |
| Lambert L | 0.0003141593 |
| Foot-lambert fL | 0.2918635164 |
| Apostilb asb | 3.1415925172 |
| Blondel blondel | 3.1415925172 |
| Millilambert mL | 0.3141592517 |
| Skot sk | 3,141.5925172293 |
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Common tasks
Popular luminance conversions
Reference
How luminance conversion works
Luminance describes luminous intensity emitted or reflected in a direction per projected area. Values are normalized to Candela per square meter before conversion to the requested output unit.
Values are converted to candela per square meter first, then from that reference into the requested unit. Keeping a single documented reference reduces inconsistent pair-by-pair constants.
Unit reference
| Unit | Symbol | 1 unit in cd/m² |
|---|---|---|
| Candela per square meter | cd/m² | 1 |
| Nit | nt | 1 |
| Stilb | sb | 10,000 |
| Candela per square centimeter | cd/cm² | 10,000 |
| Candela per square foot | cd/ft² | 10.76391 |
| Candela per square inch | cd/in² | 1,550.003 |
| Lambert | L | 3,183.099 |
| Foot-lambert | fL | 3.426259 |
| Apostilb | asb | 0.3183099 |
| Blondel | blondel | 0.3183099 |
| Millilambert | mL | 3.183099 |
| Skot | sk | 0.0003183099 |
Long-tail directory
Every indexed conversion
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From Candela per square meter (cd/m²)
From Nit (nt)
From Stilb (sb)
From Candela per square centimeter (cd/cm²)
Primary source
Definitions and standards
The SI framework is checked against NIST Guide for the Use of the International System of Units. Conventional factors are retained from the extended ConvertWin inventory and carry the accuracy note shown above.
See Methods & sources for rounding rules, exact-value handling, and review policy.
Questions
Luminance FAQ
What is the reference unit for luminance conversions?
ConvertWin uses candela per square meter (cd/m²) as the internal reference for this category, then converts to the selected output unit.
How accurate is this luminance converter?
SI relationships follow the cited reference. Conventional and domain-specific factors use the established ConvertWin factor inventory; verify safety-critical work against the governing standard.