Convert Phots to Millilux (ph to mlx)
1 phot (ph) = 10000000 millilux (mlx). 1 mlx = 1 × 10⁻⁷ ph. Example: 15 ph = 15 × 10000000 = 150000000 mlx.
Also searched as phots to mlx, phots in mlx, phots into millilux, ph to mlx, ph in millilux, ph into millilux, phot to millilux, ph to millilux converter and how many millilux in a phot.
1 ph = 10000000 mlx
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk phot to millilux converter to paste a column from Excel.
How to Convert Phot to Millilux
- 1 ph = 10000000 mlx
- 1 mlx = 1 × 10⁻⁷ ph
- Example: convert 15 ph to mlx: 15 ph = 15 × 10000000 mlx = 150000000 mlx
Formula
mlx = ph × 10000000
Derivation from SI units:
- 1 ph = 1 lm/cm² = 10⁴ lx.
- 1 mlx = 10⁻³ lx.
- 1 ph = 10000 lx ÷ 0.001 lx per mlx = 10000000 mlx
Both units are defined exactly, so the factor is exact. Phot definition: phot; Millilux definition: millilux.
Worked examples
- A reading of 2 ph converts to 20000000 mlx.
2 ph × 10000000 = 20000000 mlx - A value of 20 ph is 200000000 mlx.
20 ph × 10000000 = 200000000 mlx
Phot to Millilux conversion table
| Phots (ph) | Millilux (mlx) |
|---|---|
| 0.1 ph | 1000000 mlx |
| 0.5 ph | 5000000 mlx |
| 1 ph | 10000000 mlx |
| 2 ph | 20000000 mlx |
| 5 ph | 50000000 mlx |
| 10 ph | 100000000 mlx |
| 20 ph | 200000000 mlx |
| 50 ph | 500000000 mlx |
| 100 ph | 1000000000 mlx |
| 1000 ph | 10000000000 mlx |
Where it's used
Phots are used for older optics literature, while millilux appear in night-vision and low-light camera specifications. Both measure illuminance (light falling on a surface), so the conversion is a fixed factor.
Phot to other illuminance units
| Conversion | 1 ph equals |
|---|---|
| phot to millilux | 10000000 mlx |
| phot to lux | 10000 lx |
| phot to foot-candle | 929.0304 fc |
| phot to kilolux | 10 klx |
Frequently asked questions
How many millilux are in 1 phot?
1 ph = 10000000 mlx.
How do I convert phots to millilux?
Multiply the value in ph by 10000000. For example, 15 ph × 10000000 = 150000000 mlx.
Is the ph to mlx conversion exact?
Yes. Both units are defined exactly, and 1 ph is exactly 10000000 mlx.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "phot".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (becquerel, gray, sievert, lux) and Table 2 (candela).
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Phots to Millilux (ph to mlx). Retrieved October 25, 2026, from https://scientificconverters.com/illuminance/phots-to-millilux/
IEEE
Scientific Converters, "Convert Phots to Millilux (ph to mlx)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/illuminance/phots-to-millilux/