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Illuminance Converter

Convert illuminance instantly, swap units and compare every result.

● Live results · Runs on your device · No sign-up

Your inputs

Labelled unit definitions are used. Results are rounded for display, not intermediate calculations.

Live results

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Result visualization

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Illuminance Converter guide

Convert illuminance instantly, swap units and compare every result.

How to use this tool

  1. Enter the value you want to convert.
  2. Choose the source and destination units. Use Swap to reverse them.
  3. Compare the live equivalents, then copy a result or download the table as CSV.

A worked example

1 Lux = 0.09290304 Foot-candles. The same base-unit factors produce the remaining equivalents in the result table.

How it works

Result = input × source-unit factor ÷ destination-unit factor. All factors are relative to the same base unit; intermediate values are not rounded.

Frequently asked questions

Which unit definitions are used?

Lux, Foot-candles, Phot. Read the labels carefully: regional or decimal/binary variants are separate choices.

Why can two converters show slightly different last digits?

Rounding and the selected unit definition can differ. Keep extra precision until the final reporting step.