EV Calculator — Exposure Value from Camera Settings

EV 0 corresponds to an exposure of f/1.0 at 1 second at ISO 100. It represents a very low light level, equivalent to a dimly lit scene or deep twilight. Each EV increment halves the required exposure time.

Bright sunlight on a clear day is around EV 15. Overcast skies are EV 12-13. Sunset or sunrise is EV 10-12. Indoor scenes range from EV 5-9 depending on lighting.

The base EV is calculated at ISO 100. When you increase ISO, the adjusted EV increases because the camera needs less light. EV at ISO 400 = EV at ISO 100 + 2 stops.

Approximately. For incident light metering, Lux ≈ 2.5 × 2^EV. This is an approximation and varies with the calibration constant of your meter. EV 10 ≈ 2,560 lux, EV 15 ≈ 81,920 lux.