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Illuminance

Characteristic

footcandle

Notes

Symbol

fc

Other Name

ft-C

Metric (SI) Equivalent

10.763910417 luxes

This equivalent and the others below are calculated from exact values.

Other Metric (SI) Equivalents with More Basic Units

10.763910417 lumens / meter2

10.763910417 candela steradians / meter2

Even though the steradian is a dimensionless derived unit and could be dropped, it is shown in this equivalent for clarity

Metric (SI) Dimensions

length-2 × luminous-intensity × solid-angle

Even though solid-angle is not an official metric (SI) dimension and could be dropped, it is shown in the dimensions for clarity.

Description in Terms of Other Units and Constants

lumen / foot2

Characteristic

lux

Notes

Symbol

lx

Metric (SI) Equivalent

lux is a metric unit (in fact, it is a derived SI unit)

Other Metric (SI) Equivalents with More Basic Units

1 lumen / meter2

1 candela steradian / meter2

Even though the steradian is a dimensionless derived unit and could be dropped, it is shown in this equivalent for clarity

Metric (SI) Dimensions

length-2 × luminous-intensity × solid-angle

Even though solid-angle is not an official metric (SI) dimension and could be dropped, it is shown in the dimensions for clarity.

Characteristic

nox

Notes

Metric (SI) Equivalent

1 millilux

This equivalent and the others below are exact.

Other Metric (SI) Equivalents with More Basic Units

1 millilumen / meter2

0.001 candela steradians / meter2

Even though the steradian is a dimensionless derived unit and could be dropped, it is shown in this equivalent for clarity

Metric (SI) Dimensions

length-2 × luminous-intensity × solid-angle

Even though solid-angle is not an official metric (SI) dimension and could be dropped, it is shown in the dimensions for clarity.

Characteristic

phot

Notes

Symbol

ph

Metric (SI) Equivalent

10 kiloluxes

This equivalent and the others below are exact.

Other Metric (SI) Equivalents with More Basic Units

10 kilolumens / meter2

10000 candela steradians / meter2

Even though the steradian is a dimensionless derived unit and could be dropped, it is shown in this equivalent for clarity

Metric (SI) Dimensions

length-2 × luminous-intensity × solid-angle

Even though solid-angle is not an official metric (SI) dimension and could be dropped, it is shown in the dimensions for clarity.