Lux to Phot
Convert lux to phot (lx to ph). 1 lx = 0.0001 ph. Use the calculator, formula and conversion table.
How to convert lux to phot
Multiply the amount in lux by 0.0001 to get phot. The displayed factor and results are rounded to 12 significant digits.
ph = lx × 0.0001Worked example
1 lx = 0.0001 ph. Change the amount in the calculator above to use your own value.
Units and assumptions
Uses lux, equal to one lumen per square metre. One footcandle is one lumen per square foot. Illuminance describes light arriving at a surface; lumens alone, luminance and electrical watts need additional information. Values are rounded to 12 significant figures for display.
Calculator results use floating-point arithmetic and are rounded for display. The reference table below uses up to 12 significant digits.
Lux to Phot table
| Lux (lx) | Phot (ph) |
|---|---|
| 0 | 0 |
| 1 | 0.0001 |
| 5 | 0.0005 |
| 10 | 0.001 |
| 25 | 0.0025 |
| 100 | 0.01 |
| 1,000 | 0.1 |
About this conversion
What is the formula for lux to phot?
ph = lx × 0.0001. Multiply the amount in lux by 0.0001 to get phot. The displayed factor and results are rounded to 12 significant digits.
How do I convert back to lux?
Use the phot to lux calculator to reverse this conversion. You can also use Swap units in the calculator above.
Can I use a different pair of units?
Choose another unit in the calculator, or open the illuminance converter to browse all supported pairs.