221 lx ≈ 20.5316 ft-cd. To convert lux to foot-candles, multiply by 0.09290313: 221 × 0.09290313 = 20.5316.
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: 221 × 0.09290313 = 20.5316.
- Answer: 221 lx ≈ 20.5316 ft-cd (rounded to 6 significant figures).
Lux to Foot-candles table
| Lux (lx) | Foot-candles (ft-cd) |
|---|---|
| 216 lx | 20.0671 ft-cd |
| 217 lx | 20.16 ft-cd |
| 218 lx | 20.2529 ft-cd |
| 219 lx | 20.3458 ft-cd |
| 220 lx | 20.4387 ft-cd |
| 221 lx | 20.5316 ft-cd |
| 222 lx | 20.6245 ft-cd |
| 223 lx | 20.7174 ft-cd |
| 224 lx | 20.8103 ft-cd |
| 225 lx | 20.9032 ft-cd |
| 226 lx | 20.9961 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 |