Light (illuminance) converter
Lux and foot-candles.
1 foot-candle = 10.764 lux
How it’s calculated
lx = fc × 10.76391042
- Multiply the value in foot-candles by 10.76391042.
- To go back, divide by 10.76391042 (or multiply by 0.09290304).
- 1 fc = 10.76391042 lx · 1 lx = 0.09290304 fc
Show worked solutionFactor, unit cancellation and rounding, step by step
Find the conversion factor
By definition 1 lx = 0.09290304 fc. Source: NIST SP 811 / Handbook 44; BIPM SI Brochure (9th ed.).
Multiply by the factor written as a fraction
Put fc in the denominator so it cancels, leaving lx.
Calculate (unrounded)
Round the answer
Rounded to 5 significant figures.
Answer: 10.764 lx
1 fc in other units
Batch convert fc → lx
Results
- 1 fc = 10.764 lx
- 5 fc = 53.82 lx
- 10 fc = 107.64 lx
- 25 fc = 269.1 lx
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Common light (illuminance) conversions
Light (illuminance) units and exact definitions
| Unit | System | Definition |
|---|---|---|
| Lux (lx) | SI (metric) | Base unit |
| Foot-candle (fc) | US customary | 1 fc = 10.76391042 lx |
| Phot (ph) | other | 1 ph = 10000 lx |
Foot-candles to lux conversion table
| Foot-candles (fc) | Lux (lx) |
|---|---|
| 0.1 fc | 1.0764 lx |
| 0.5 fc | 5.382 lx |
| 1 fc | 10.764 lx |
| 2 fc | 21.528 lx |
| 3 fc | 32.292 lx |
| 4 fc | 43.056 lx |
| 5 fc | 53.82 lx |
| 6 fc | 64.583 lx |
| 7 fc | 75.347 lx |
| 8 fc | 86.111 lx |
| 9 fc | 96.875 lx |
| 10 fc | 107.64 lx |
| 15 fc | 161.46 lx |
| 20 fc | 215.28 lx |
| 25 fc | 269.1 lx |
| 30 fc | 322.92 lx |
| 40 fc | 430.56 lx |
| 50 fc | 538.2 lx |
| 75 fc | 807.29 lx |
| 100 fc | 1,076.4 lx |
| 250 fc | 2,691 lx |
| 500 fc | 5,382 lx |
| 1,000 fc | 10,764 lx |
Frequently asked questions
Which light (illuminance) units can I convert?
lux (lx), foot-candles (fc), phots (ph).
How accurate are the results?
Every unit is stored with its exact defining factor (NIST SP 811, NIST Handbook 44 or the BIPM SI Brochure). Calculations use double-precision arithmetic and are rounded only for display, to 5 significant figures by default (trailing zeros dropped, so 1 km shows as 1000 m). You can choose Auto (up to 10 digits), fixed decimals or more significant figures, or switch to scientific or engineering notation.