100 Lux to Foot-Candles
100 lx ≈ 9.29 fc
100 lux is approximately 9.29 foot-candles.
How to convert 100 lx to fc
Use the formula fc = lx ÷ 10.763910417:
fc = 100 ÷ 10.763910417fc = 9.290304
So 100 lx = 9.290304 fc, or about 9.29 fc rounded.
Rounded values and quick estimate
- Rounded to a whole number: 9 fc
- Rounded to one decimal place: 9.3 fc
- Conversion factor: 1 lux = 0.0929 foot-candles
Quick mental estimate: divide by 10. For 100 lx that gives about 10 fc — off by 0.7097 fc (7.6%). Use the exact formula when precision matters.
100 Lux in other units
- Foot-candles
- 9.29 fc
100 lx and nearby values
| Lux | Foot-candles |
|---|---|
| 96 lx | 8.92 fc |
| 97 lx | 9.01 fc |
| 98 lx | 9.1 fc |
| 99 lx | 9.2 fc |
| 100 lx | 9.29 fc |
| 101 lx | 9.38 fc |
| 102 lx | 9.48 fc |
| 103 lx | 9.57 fc |
| 104 lx | 9.66 fc |
About lux and foot-candles
Lux is the SI unit of illuminance: one lumen per square meter. Offices are typically lit to 300–500 lux.
A foot-candle is one lumen per square foot, about 10.76 lux. US lighting design often uses foot-candles.
Related conversions
Frequently asked questions
What is 100 Lux in Foot-Candles?
100 lux is about 9.29 foot-candles (100 lx ≈ 9.29 fc).
How do you convert 100 lx to fc?
Apply fc = lx ÷ 10.763910417: fc = 100 ÷ 10.763910417, fc = 9.290304.
How many lux is 9.29 fc?
9.29 fc is about 100 lux.