Convert Foot-candles to Phot
Input the number of foot-candles you want to convert to phots.
How to Convert Foot-candles to Phots
The foot-candle and phot are both units of illuminance. 1 phot equals 929.03039997 foot-candles. This means to convert foot-candles to phots, you divide by 929.03039997.
Formula
Step-by-Step Example
Convert 5 fc to phots:
We need to convert foot-candles to phots
Since 1 ph = 929.03039997 fc, divide by 929.03039997
5 ÷ 929.03039997 = 0.0053819552
5 fc = 0.0053819552 ph
Foot-candle to Phot Conversion Table
Quick reference table for common foot-candle to phot conversions. Click any value for detailed calculation.
| Foot-candles (fc) | Phots (ph) |
|---|---|
| 0.1 fc | 0.0001076391 ph |
| 0.5 fc | 0.0005381955 ph |
| 1 fc | 0.001076391 ph |
| 2 fc | 0.0021527821 ph |
| 5 fc | 0.0053819552 ph |
| 10 fc | 0.0107639104 ph |
| 25 fc | 0.026909776 ph |
| 50 fc | 0.0538195521 ph |
| 100 fc | 0.1076391042 ph |
About These Units
Foot-candle (fc)
A foot-candle (fc) is the imperial illuminance unit—light from one candela source at one foot distance, equal to 10.764 lux. US lighting standards: office 30-50 fc, retail 50-100 fc, warehouse 10-30 fc. IESNA recommendations use foot-candles. One fc = one lumen per square foot.
Phot (ph)
The phot (ph) is the CGS unit of illuminance equal to 10,000 lux or 1 lumen per square centimeter. Very bright: full sunlight is about 10 phots. Found in older scientific literature. One phot = 929 foot-candles. Largely replaced by lux in modern usage.
Frequently Asked Questions
How do I convert foot-candles to phots?
To convert foot-candles to phots, divide the value by 929.03039997. For example, 10 fc = 0.0107639104 ph.
How many phots are in 1 foot-candle?
1 foot-candle equals 0.001076391 phots.
What is the formula for foot-candles to phots?
The formula is: ph = fc ÷ 929.03039997.