Phot to Lux
Convert phot to lux (ph to lx). 1 ph = 10,000 lx. Use the calculator, formula and conversion table.
How to convert phot to lux
Multiply the amount in phot by 10,000 to get lux. The displayed factor and results are rounded to 12 significant digits.
lx = ph × 10,000Worked example
1 ph = 10,000 lx. 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.
Phot to Lux table
| Phot (ph) | Lux (lx) |
|---|---|
| 0 | 0 |
| 1 | 10,000 |
| 5 | 50,000 |
| 10 | 100,000 |
| 25 | 250,000 |
| 100 | 1,000,000 |
| 1,000 | 10,000,000 |
About this conversion
What is the formula for phot to lux?
lx = ph × 10,000. Multiply the amount in phot by 10,000 to get lux. The displayed factor and results are rounded to 12 significant digits.
How do I convert back to phot?
Use the lux to phot 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.