Illuminance
Lux to Phot Converter
Convert Lux to Phot with the exact formula, a worked example and a quick conversion table.
Smart input
β
Quick values:
Conversion formula
The exact formula applied:
β
Conversion formula
ph = lx Γ· 10000
lx = ph Γ 10000
Worked example
1 lx = 0.0001 ph
ph = lx Γ· 10000
Illuminance is in lux (lumen/mΒ²); the foot-candle is used in US practice (1 fc = 10.764 lux).
Quick conversion table
| Lux (lx) | Phot (ph) |
|---|---|
| 0.001 | 1 Γ 10β»β· |
| 0.01 | 0.000001 |
| 0.1 | 0.00001 |
| 1 | 0.0001 |
| 10 | 0.001 |
| 100 | 0.01 |
| 1,000 | 0.1 |
Reverse conversion table
| Phot (ph) | Lux (lx) |
|---|---|
| 0.001 | 10 |
| 0.01 | 100 |
| 0.1 | 1,000 |
| 1 | 10,000 |
| 10 | 100,000 |
| 100 | 1,000,000 |
| 1,000 | 10,000,000 |
About the two units
lxLux
One lumen per square metre.
1 lx = 1 lx
SI Derived Unit Illuminance
phPhot
One phot = 10,000 lux (CGS).
1 ph = 10000 lx
Non-SI Unit Illuminance
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