Convert Phot to Foot-candle
Use this free converter to change phot (ph) into foot-candles (fc). Phot and foot-candle both measure illuminance. As a quick reference, 1 ph equals 929.0304 fc, and 1 fc equals 0.001076391 ph.
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Foot-candle (fc)
929.0304
1 ph = 929.0304 fc
Illuminance conversion table
| Phot | Foot-candle |
|---|---|
| 0.01 | 9.290304 |
| 0.1 | 92.90304 |
| 0.5 | 464.5152 |
| 1 | 929.0304 |
| 2 | 1858.0608 |
| 3 | 2787.0912 |
| 5 | 4645.152 |
| 10 | 9290.304 |
| 20 | 18580.608 |
| 25 | 23225.76 |
| 50 | 46451.52 |
| 100 | 92903.04 |
| 1,000 | 929030.4 |
How to convert Phot to Foot-candle
Multiply the phot value by 929.0304 to get foot-candles.
- Enter the number of phot you want to convert.
- The converter instantly shows the equivalent value in foot-candles.
- Worked example: 15 ph × 929.0304 = 13935.456 fc.
- Use the swap button to reverse the conversion (foot-candle to phot).
About these units
Phot (ph)
- Definition
- A phot (ph) is a CGS unit of illuminance equal to 10,000 lux, or one lumen per square centimeter.
- History
- It was part of the CGS system, predating the SI, and is now largely obsolete.
- Current use
- The phot is rarely used today, appearing only in older technical literature.
Foot-candle (fc)
- Definition
- A foot-candle (fc) is the illuminance produced by one lumen per square foot, equal to about 10.764 lux.
- History
- It originated in the era before the metric system and takes its name from the illuminance one foot from a standard candle.
- Current use
- Foot-candles remain the standard lighting unit in the United States for architectural and stage-lighting specifications.
Frequently asked questions
How many foot-candles are in a phot?
There are 929.0304 fc in 1 ph. To convert, multiply the number of phot by 929.0304.
How do I convert phot to foot-candles?
Multiply the phot value by 929.0304 to get foot-candles. For example, 10 ph = 9290.304 fc.
Is this phot-to-foot-candle converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Phot to other illuminance units
| Unit | 1 Phot equals |
|---|---|
| Lux (lx) | 10000 lx |
| Millilux (mlx) | 10000000 mlx |
| Kilolux (klx) | 10 klx |
| Foot-candle (fc) | 929.0304 fc |
| Nox (nx) | 10000000 nx |