Illuminance Converter

What units does this illuminance converter support?

Common units include lux and foot-candles — the metric and imperial measures of light intensity falling on a surface.

How do I convert lux to foot-candles?

Divide the lux value by approximately 10.764 to get foot-candles.

What is illuminance used for?

Illuminance measures how much light falls on a given surface area — used in photography, lighting design, workplace safety standards, and horticulture (grow light) planning.

What is a typical lux level for indoor office lighting?

Office lighting standards commonly recommend around 300-500 lux for general work areas, though requirements vary by task and region.

Is this tool free to use?

Yes, completely free with no signup, no limits and no software to install.

Is my data saved anywhere?

No — conversions run in your browser and the values you enter are not stored or sent to a server.

Is this useful for photography light metering?

Yes — photographers sometimes work with light meter readings in different units depending on the equipment, and this tool helps standardize comparisons.

What's the difference between lux and lumens?

Lumens measure total light output from a source, while lux measures the intensity of light actually landing on a surface at a given distance — lux accounts for how spread out that light is.

Is this useful for indoor plant grow light setups?

Yes — many grow light specifications and plant light requirements are given in lux or foot-candles, and converting between them helps when comparing equipment from different sources.

How bright is direct sunlight in lux?

Direct sunlight is typically around 32,000-100,000 lux, far brighter than typical indoor lighting, which is usually a few hundred lux.