40 lx ≈ 3.7161 ft-cd. To convert lux to foot-candles, multiply by 0.09290313: 40 × 0.09290313 = 3.7161.
How to convert lux to foot-candles
ft-cd = lx × 0.09290313
- 1 lx = 0.09290313 ft-cd (and 1 ft-cd = 10.7639 lx).
- Multiply the amount by the factor: 40 × 0.09290313 = 3.7161.
- Answer: 40 lx ≈ 3.7161 ft-cd (rounded to 6 significant figures).
Lux to Foot-candles table
| Lux (lx) | Foot-candles (ft-cd) |
|---|---|
| 35 lx | 3.2516 ft-cd |
| 36 lx | 3.3445 ft-cd |
| 37 lx | 3.4374 ft-cd |
| 38 lx | 3.5303 ft-cd |
| 39 lx | 3.6232 ft-cd |
| 40 lx | 3.7161 ft-cd |
| 41 lx | 3.809 ft-cd |
| 42 lx | 3.9019 ft-cd |
| 43 lx | 3.9948 ft-cd |
| 44 lx | 4.0877 ft-cd |
| 45 lx | 4.1806 ft-cd |
| lx | ft-cd |
|---|---|
| 1 lx | 0.0929031 ft-cd |
| 5 lx | 0.464516 ft-cd |
| 10 lx | 0.929031 ft-cd |
| 50 lx | 4.6452 ft-cd |
| 100 lx | 9.2903 ft-cd |
| 1,000 lx | 92.9031 ft-cd |