Luminance Converter
Convert surface luminance between nits, stilbs and lambert definitions.
Settings & files
Conversion settings
Generate a value range
Open files
Up to 1,000 rows and 200,000 input characters. Decimal points and scientific notation are supported; unit codes are case-sensitive. Text files must use UTF-8.
Try the example, paste input or open a file to begin.
Convert through cd_per_m2: input × source factor ÷ target factor. Unit codes are case-sensitive. The unit-comparison table shows the factor definitions. No density, temperature reference or other quantity is inferred.
Supported units & reference factors
Each factor converts one unit to cd_per_m2. Codes use u for micro. Factors preserve the quantity and selected unit definitions.
| Unit code | Factor to cd_per_m2 |
|---|---|
| cd_per_m2 | 1 |
| nit | 1 |
| kcd_per_m2 | 1000 |
| stilb | 10000 |
| lambert | 3183.098861837907 |
| foot_lambert | 3.4262590996353905 |
Conversion audit
Compare units for the first valid input
File batch status
Saved comparisons · current tab
Using Luminance Converter
Convert surface luminance between nits, stilbs and lambert definitions.
- Select the conversion direction or source and target units, then review the format-specific settings.
- Paste your input, try an editable example or open files. Choose Convert and inspect the preview and audit.
- Download the actual result, export an audit or report, or convert up to 10 files into a ZIP. Review any errors before using the output.
Example
100 nit 1 foot_lambert
Questions & answers
What can Luminance Converter convert?
Convert surface luminance between nits, stilbs and lambert definitions.
Which format rules should I check?
Convert through cd_per_m2: input × source factor ÷ target factor. Unit codes are case-sensitive. The unit-comparison table shows the factor definitions. No density, temperature reference or other quantity is inferred.
Can I convert several files?
Yes. Open up to 10 files, select the settings and choose Convert files to ZIP. The status table identifies converted and failed files. The downloaded ZIP includes outputs and an audit; failures are not silently treated as successful.
How do I check the result?
Review each row, its source code and numeric result. Compare the first valid input in all supported units, swap source and target, or feed the converted values back as input. Formatting affects display only.
What are the limits?
Up to 1,000 rows and 200,000 input characters. Decimal points and scientific notation are supported; unit codes are case-sensitive.
Is input sent to a conversion service?
The conversion runs locally in a browser worker with bundled scripts. No conversion API is called. Copying and downloads happen only when you click their buttons. Saved comparisons stay in this tab and are cleared by reload. Ad-supported pages can load third-party scripts.
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