Phot to Lux Converter
1 phot is exactly 10000 lux. Convert phots (ph) to lux (lx) below: type a value and the result updates as you type.
ph to lx calculator
Result
Phot to Lux conversion
1 ph = 10000 lxone phot in lux
1 lx = 0.0001 phone lux in phots
Phot (ph): CGS unit of illuminance: one lumen per square centimeter, exactly 10,000 lux.
Lux (lx): SI unit of illuminance: one lumen per square meter. Office lighting is typically around 500 lx.
Source:Phot: NIST Special Publication 811 (2008), Appendix B.8; Lux: SI Brochure, 9th edition (BIPM, 2019)
How to convert phots to lux
To convert phots to lux, multiply the number of phots by 10000.
Formula
lx = ph × 10000
Examples
- 5 ph = 5 × 10000 = 50000 lx
- 25 ph = 25 × 10000 = 250000 lx
- 100 ph = 100 × 10000 = 1000000 lx
Phot to Lux conversion table
| Phot (ph) | Lux (lx) |
|---|---|
| 0.1 ph | 1000 lx |
| 0.5 ph | 5000 lx |
| 1 ph | 10000 lx |
| 2 ph | 20000 lx |
| 3 ph | 30000 lx |
| 5 ph | 50000 lx |
| 10 ph | 100000 lx |
| 20 ph | 200000 lx |
| 25 ph | 250000 lx |
| 50 ph | 500000 lx |
| 100 ph | 1000000 lx |
| 250 ph | 2500000 lx |
| 500 ph | 5000000 lx |
| 1000 ph | 10000000 lx |
Values rounded to 10 significant digits where needed.
Frequently asked questions
- How many lux are in one phot?
- One phot is exactly 10000 lux.
- How do I convert lux to phots?
- To convert lux to phots, multiply the number of lux by 0.0001. The formula is ph = lx × 0.0001.
- Is this conversion exact?
- Yes. Both units have exact definitions and the factor 10000 is exact. Displayed results are only rounded when they have many decimal places.
- Which is larger, a phot or a lux?
- A phot is 10000 times larger than a lux. In other words, a lux is exactly 1/10000 of a phot.