Shutter seconds to f-stops
Type a value in s to get it in f/N instantly.
0.2087f/N
That's 10× as bright as full moonlight, while a candlelit room is 6.1× brighter. That is about 2.613 times the light of EV 0.
What it means
How much light is that?
All values are at ISO 100. Shutter speeds assume f/5.6 and apertures assume 1/60 s, since EV fixes only the combination, not either one alone.
The math
How to convert s to f/N
Exposure value is logarithmic: EV = log₂(N² ÷ t) for aperture N and shutter time t, and each step of one either doubles or halves the light. Lux follows as lux = 2.5 × 2^EV at ISO 100.
Example: 12 s = 0.2087 f/N.
Every unit
Your exposure in every unit
Tables
s to f/N conversion table
| s | f/N |
|---|---|
| 0.00012 s | 65.9966 f/N |
| 0.000479 s | 33.0327 f/N |
| 0.000957 s | 23.3699 f/N |
| 0.00191 s | 16.5423 f/N |
| 0.00766 s | 8.26034 f/N |
| 0.0306 s | 4.13287 f/N |
| 0.123 s | 2.06139 f/N |
| 0.49 s | 1.0328 f/N |
| 1.96 s | 0.516398 f/N |
| 7.84 s | 0.258199 f/N |
| 31.4 s | 0.129017 f/N |
| 125 s | 0.0646632 f/N |
f/N to s conversion table
| f/N | s |
|---|---|
| 0.0645 f/N | 125.633 s |
| 0.129 f/N | 31.4084 s |
| 0.258 f/N | 7.85209 s |
| 0.516 f/N | 1.96302 s |
| 1.03 f/N | 0.492663 s |
| 2.07 f/N | 0.121979 s |
| 4.13 f/N | 0.0306425 s |
| 8.26 f/N | 0.00766063 s |
| 16.5 f/N | 0.0019198 s |
| 23.4 f/N | 0.000954538 s |
| 33 f/N | 0.000479951 s |
| 66.1 f/N | 0.000119625 s |
Quick answers
Quick answers
- How many f/N is 1 s?
- 1 s is 0.722957 f/N.
- How many f/N is 10 s?
- 10 s is 0.228619 f/N.
- How many f/N is 12 s?
- 12 s is 0.2087 f/N.
The units
About these units
Shutter seconds (s)
The shutter time that captures this light at f/5.6.
F-stops (f/N)
The aperture that captures this light at 1/60 second.
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