TechTools

Luminance Converter

From
To
Sig. figures:

Candela per square metre (nit)

cd/m² (nit)

300(input)

Kilocandela per square metre

kcd/m²

0.3

Millicandela per square metre

mcd/m²

300000

Stilb

sb

0.03

Millistilb

msb

30

Lambert

L

0.0942478

Millilambert

mL

94.2478

Apostilb (blondel)

asb

942.478

Skot

sk

942478

Foot-lambert

fL

87.5591

Candela per square foot

cd/ft²

27.8709

Candela per square inch

cd/in²

0.193548

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Convert luminance across 12 units: SI/nit (cd/m², kcd/m², mcd/m²), CGS/stilb (stilb = 10,000 cd/m², millistilb), photometric (lambert, millilambert, apostilb = 1/π cd/m², skot), and Imperial (foot-lambert, cd/ft², cd/in²). Reference: LCD monitor 250–500 nit, phone 700–1000 nit. 100% browser-based.

How to Use

  1. 1Type a luminance value (e.g. 300 for 300 cd/m²)
  2. 2Select your starting unit (e.g. cd/m² nit, foot-lambert, stilb)
  3. 3Select your target unit - the result appears instantly
  4. 4All 12 conversions appear across SI/nit, CGS/stilb, Photometric, and Imperial groups
  5. 5Hover any row to copy or use as input; click ⇄ to swap
  6. 6Open 'Luminance reference values' for display and lighting benchmarks

Features

  • 12 luminance units across SI/nit, CGS/stilb, photometric, and Imperial
  • cd/m² (nit), kcd/m², mcd/m², stilb, millistilb, lambert, millilambert, apostilb, foot-lambert, cd/ft², cd/in², skot
  • Reference: LCD monitor, phone screen, clear sky, full moon
  • Adjustable significant figures and scientific notation toggle
  • One-click copy per result
  • 100% browser-based

Frequently Asked Questions

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