Phot to Foot-candles Converter

Summary

Enter a phot value and get the equivalent in foot-candles instantly; 1 ph = 929.0304 fc.

How it works

1. Enter the illuminance value in phot in the input field.
2. The converter applies the exact factor: fc = ph × 929.0304.
3. The foot-candle result appears instantly with the full formula shown.
4. Use the swap button to convert foot-candles back to phot.
5. Click any row in the reference table to load that value into the converter.

Use cases

• Convert CGS phot readings from older photometric equipment into foot-candles.
• Translate historical optical research data into foot-candles for US-based documentation.
• Cross-check illuminance values in pre-SI physics or horticulture textbooks.
• Interpret grow-light data from CGS sources in foot-candle terms for American growers.
• Verify illuminance unit conversions when reviewing legacy architectural specifications.
• Compare laboratory photometry results (in phot) with American building-code foot-candle requirements.

Frequently Asked Questions