What is the illumination converter?
The illumination converter is a collection of calculators for changing one illumination unit into another. Convert illuminance units for lighting design, photography, workplaces, architecture, and optical calculations.
Illumination conversions are useful for lighting design, workplace standards, photography, architecture, displays, and optical calculations.
Available illumination units
This category includes the following units:
- Lux (lx)
- Foot-candle (fc)
- Phot (ph)
- Nox (nx)
- Meter-candle (m-cd)
Common illumination use cases
Use this category when the same measurement appears in different unit systems, data sheets, calculators, reports, or regional conventions.
- Illumination conversions help compare measurements across specifications, calculators, labels, and technical references.
- Use this category when source data and target documents use different illumination units.
- The dedicated conversion pages show formulas, examples, tables, related pages, and FAQ for individual unit pairs.
Popular illumination units explained
These short unit notes help readers choose the right starting unit before opening a specific conversion page.
Lux (lx)
Lux (lx) is a illumination unit.
Browse lux conversionsFoot-candle (fc)
Foot-candle (fc) is a illumination unit.
Browse foot-candles conversionsPhot (ph)
Phot (ph) is a illumination unit.
Browse phots conversionsNox (nx)
Nox (nx) is a illumination unit.
Browse nox conversionsMeter-candle (m-cd)
Meter-candle (m-cd) is a illumination unit.
Browse meter-candles conversionsCommon illumination conversion mistakes
Most wrong answers come from mixing unit systems, rounding too early, or choosing a unit that looks similar but means something different.
- Do not hide the original illumination unit when copying a result into a report, label, or calculator.
- Do not round intermediate values when the result will be reused in another formula.
- Check whether the source and target units describe the same physical quantity before comparing illumination values.
Popular illumination conversion pages
Start with one of these common illumination conversions:
- lux to foot-candles
- lux to phots
- lux to nox
- lux to meter-candles
- foot-candles to lux
- foot-candles to phots
Browse illumination conversions by starting unit
Use these grouped links when you know the unit you are starting from and want to compare several destination units.
Lux conversions
Start with lux and convert to common illumination units.
Foot-candle conversions
Start with foot-candles and convert to common illumination units.
Phot conversions
Start with phots and convert to common illumination units.
Nox conversions
Start with nox and convert to common illumination units.
Meter-candle conversions
Start with meter-candles and convert to common illumination units.
All illumination conversion pages
This complete index helps users and search engines discover every generated illumination conversion page.
Related categories and references
Use these links to move between neighboring converter categories, hand-written unit references, popular units, and complete site indexes.
Unit Wiki and references
Popular illumination units
Complete indexes and tools
How illumination conversion works
Illumination conversions use a standard reference unit as the bridge between source and target units, so each page can show both the direct formula and practical examples.
How to use this converter
Enter a value, choose the units, and read the converted result immediately. Each dedicated conversion page also includes a formula, examples, a conversion table, related links, and FAQ.
FAQ
Which illumination units are included?
This category includes lux, foot-candles, phots, nox, meter-candles and related units.
Are formulas included?
Yes. Individual conversion pages include formulas, manual steps, examples, and conversion tables.