Phot to Lux Converter
Quick answer
To convert Phots to Lux, multiply by 10,000 (or divide by 0.0001). Therefore, 1 Phot (ph) equals 10,000 Lux (lx).
Formula: lx = ph × 10,000. Worked example: 10 ph = 100,000 lx.
Convert Phot (ph) to Lux (lx) online with our free unit converter. In illuminance, 1 ph = 10,000 lx. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Phot to Lux
- Step 1 — start with the formula. lx = ph × 10,000
- Step 2 — substitute your figure. 10 ph × 10,000
- Step 3 — read the result. 10 ph = 100,000 lx
- Step 4 — check it in reverse. ph = lx × 0.0001 returns Invalid ph, which matches the figure you started with.
Illuminance Converter
4 units available
1 ph = 10,000 lx
Formula:
lx = ph × 10,000With your value: 1 ph = 10,000 lx
Other Phot to Lux conversions
Phot to Lux Conversion Table
| Phot (ph) | Lux (lx) |
|---|---|
| 0.5 | 5,000 |
| 1 | 10,000 |
| 2 | 20,000 |
| 5 | 50,000 |
| 10 | 100,000 |
| 15 | 150,000 |
| 20 | 200,000 |
| 25 | 250,000 |
| 50 | 500,000 |
| 100 | 1,000,000 |
| 250 | 2,500,000 |
| 500 | 5,000,000 |
| 1000 | 10,000,000 |
Lux to Phot Conversion Table
| Lux (lx) | Phot (ph) |
|---|---|
| 0.5 | 5.000000e-5 |
| 1 | 0.0001 |
| 2 | 0.0002 |
| 5 | 0.0005 |
| 10 | 0.001 |
| 15 | 0.0015 |
| 20 | 0.002 |
| 25 | 0.0025 |
| 50 | 0.005 |
| 100 | 0.01 |
| 250 | 0.025 |
| 500 | 0.05 |
| 1000 | 0.1 |
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
Lux (lx)
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 Lux
To convert from Phot (ph) to Lux (lx), multiply the value by 10,000.
Formula: lx = ph × 10,000
Reverse: ph = lx × 0.0001
Step-by-Step Example
- Start with your value in Phot. For example: 5 ph
- Multiply by the conversion factor: 5 x 10,000
- The result is: 50,000 lx
Phot and Lux Relationship
This calculation facilitates standardized conversion between recognized units of illuminance. Since 1 Phot equals approximately 10,000 Lux, the Phot represents a larger unit interval than the Lux. Understanding the relationship between Phot and Lux is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Phot
The Phot (symbol: ph) is a recognized unit in the Standard measurement framework, utilized within illuminance applications for precision and standardized data representation.
Common uses of Phot: illuminance calculations, engineering and science, education.
About Lux
Lux (lx) is the SI unit of illuminance, measuring luminous flux per unit area. It is equal to one lumen per square meter.
Fun Fact: Direct sunlight is about 32,000 to 100,000 lux.
Common uses of Lux: lighting design, photography, workspace safety.
Frequently Asked Questions
- How many Lux are in 1 Phot?
- There are exactly 10,000 Lux in 1 Phot. This means the conversion factor from Phot to Lux is 10,000.
- What is the formula to convert Phot to Lux?
- The formula to convert Phot to Lux is: lx = ph × 10,000. For example, to convert 10 Phots to Lux, you would multiply 10 by 10,000.
- What is a Phot?
- The Phot (symbol: ph) is a recognized unit in the Standard measurement framework, utilized within illuminance applications for precision and standardized data representation.
- What is a Lux?
- Lux (lx) is the SI unit of illuminance, measuring luminous flux per unit area. It is equal to one lumen per square meter.
- What are the common uses of Phot?
- The Phot is commonly used in illuminance calculations, engineering and science, education.
Related Illuminance Conversions
Cite this page
UnitConvertLab. (2026). Phot to Lux converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/phot-to-lux