Micromoles per square meter per second to foot-candles
Type a value in µmol/m²/s to get it in fc instantly.
That's 1.33× as bright as seedlings under lights, while a flowering crop is 2× brighter. Over a 12-hour day that is a light integral of about 17.28 mol/m².
What it means
How much light is that?
Lux and PPFD relate differently for every light source, because lux weights by the human eye. The 54 lux per µmol used here is the daylight figure; a red-heavy LED can be half that.
The math
How to convert µmol/m²/s to fc
To convert micromoles per square meter per second to foot-candles, multiply by 5.01677.
Example: 400 µmol/m²/s × 5.01677 = 2,006.71 fc.
In the other direction, 1 fc = 0.199331 µmol/m²/s.
Every unit
Your light level in every unit
Tables
µmol/m²/s to fc conversion table
| µmol/m²/s | fc |
|---|---|
| 10 µmol/m²/s | 50.1677 fc |
| 50 µmol/m²/s | 250.838 fc |
| 100 µmol/m²/s | 501.677 fc |
| 200 µmol/m²/s | 1,003.35 fc |
| 300 µmol/m²/s | 1,505.03 fc |
| 400 µmol/m²/s | 2,006.71 fc |
| 600 µmol/m²/s | 3,010.06 fc |
| 800 µmol/m²/s | 4,013.42 fc |
| 1,000 µmol/m²/s | 5,016.77 fc |
| 1,500 µmol/m²/s | 7,525.15 fc |
| 2,000 µmol/m²/s | 10,033.5 fc |
fc to µmol/m²/s conversion table
| fc | µmol/m²/s |
|---|---|
| 10 fc | 1.99331 µmol/m²/s |
| 50 fc | 9.96657 µmol/m²/s |
| 100 fc | 19.9331 µmol/m²/s |
| 200 fc | 39.8663 µmol/m²/s |
| 300 fc | 59.7994 µmol/m²/s |
| 400 fc | 79.7326 µmol/m²/s |
| 600 fc | 119.599 µmol/m²/s |
| 800 fc | 159.465 µmol/m²/s |
| 1,000 fc | 199.331 µmol/m²/s |
| 1,500 fc | 298.997 µmol/m²/s |
| 2,000 fc | 398.663 µmol/m²/s |
Quick answers
Quick answers
- How many fc is 1 µmol/m²/s?
- 1 µmol/m²/s is 5.01677 fc.
- How many fc is 10 µmol/m²/s?
- 10 µmol/m²/s is 50.1677 fc.
- How many fc is 400 µmol/m²/s?
- 400 µmol/m²/s is 2,006.71 fc.
The units
About these units
Micromoles per square meter per second (µmol/m²/s)
PPFD, the standard for grow lights: photons landing per second.
Foot-candles (fc)
The US illuminance unit, still on many horticultural meters.
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