Phot to Nox Converter
Convert Phot (ph) to Nox (nx) instantly. 1 ph = 10,000,000 nx.
Illuminance Converter
4 units available
1 ph = 10,000,000 nx
Formula:
nx = ph × 10,000,000With your value: 1 ph = 10,000,000 nx
Other Phot to Nox conversions
Phot to Nox Conversion Table
| Phot (ph) | Nox (nx) |
|---|---|
| 0.5 | 5,000,000 |
| 1 | 10,000,000 |
| 2 | 20,000,000 |
| 5 | 50,000,000 |
| 10 | 100,000,000 |
| 15 | 150,000,000 |
| 20 | 200,000,000 |
| 25 | 250,000,000 |
| 50 | 500,000,000 |
| 100 | 1,000,000,000 |
| 250 | 2,500,000,000 |
| 500 | 5,000,000,000 |
| 1000 | 10,000,000,000 |
Nox to Phot Conversion Table
| Nox (nx) | Phot (ph) |
|---|---|
| 0.5 | 5.000000e-8 |
| 1 | 1.000000e-7 |
| 2 | 2.000000e-7 |
| 5 | 5.000000e-7 |
| 10 | 1.000000e-6 |
| 15 | 1.500000e-6 |
| 20 | 2.000000e-6 |
| 25 | 2.500000e-6 |
| 50 | 5.000000e-6 |
| 100 | 1.000000e-5 |
| 250 | 2.500000e-5 |
| 500 | 5.000000e-5 |
| 1000 | 0.0001 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Phot (ph)
Illuminance
Derived from the lux (1 lx = 1 lm/m²); the foot-candle is 1 lm/ft².
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Nox (nx)
Illuminance
Derived from the lux (1 lx = 1 lm/m²); the foot-candle is 1 lm/ft².
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
How to Convert Phot to Nox
To convert from Phot (ph) to Nox (nx), multiply the value by 10,000,000.
Formula: nx = ph × 10,000,000
Reverse: ph = nx × 1.000000e-7
Step-by-Step Example
- Start with your value in Phot. For example: 5 ph
- Multiply by the conversion factor: 5 x 10,000,000
- The result is: 50,000,000 nx
About Phot
The phot (ph) is a unit of illuminance. One phot equals 10000 luxs. UnitConvertLab converts it against every other illuminance unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
Common uses: illuminance calculations, engineering and science, education.
About Nox
The nox (nx) is a unit of illuminance. One nox equals 0.001 luxs. UnitConvertLab converts it against every other illuminance unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
Common uses: illuminance calculations, engineering and science, education.
Frequently Asked Questions
How many Nox are in 1 Phot?
There are exactly 10,000,000 Nox in 1 Phot. This means the conversion factor from Phot to Nox is 10,000,000.
What is the formula to convert Phot to Nox?
The formula to convert Phot to Nox is: nx = ph × 10,000,000. For example, to convert 10 Phot to Nox, you would multiply 10 by 10,000,000.
What is a Phot?
The phot (ph) is a unit of illuminance. One phot equals 10000 luxs. UnitConvertLab converts it against every other illuminance unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
What is a Nox?
The nox (nx) is a unit of illuminance. One nox equals 0.001 luxs. UnitConvertLab converts it against every other illuminance unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
What are the common uses of Phot?
The Phot is commonly used in illuminance calculations, engineering and science, education.
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Cite this page
UnitConvertLab. (2026). Phot to Nox converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/phot-to-nox