Exposure calculator

Calculate equivalent exposures, EV values, ND filter adjustments, and reciprocity corrections.

Free & unlimitedWorks offline

Exposure triangle

Solve for:

Exposure value

EV 8.9

EV = log₂(N² / t)

Light

Medium

Lux

1200

Foot-candle

111.5

Quick actions

ISO

Aperture

Shutter speed

Exposure compensation

Equivalent exposures (ISO 100)

Aperture	Shutter	Exact	Style
f/1	1/500	1/480	Very shallow DoF
f/1.4	1/250	1/245	Very shallow DoF
f/2	1/125	1/120	Very shallow DoF
f/2.8	1/60	1/61	Shallow DoF
f/4	1/30	1/30	Shallow DoF
f/5.6	1/15	1/15	Balanced
f/8	1/8	1/7	Deep DoF
f/11	1/4	1/4	Deep DoF
f/16	1/2	1/2	Very deep DoF
f/22	1s	1.0s	Very deep DoF
f/32	2s	2.1s	Very deep DoF

Safe handheld Use stabilisation Use tripod

ND filter calculator

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About this tool

1
Enter current exposure
Input your current shutter speed, aperture, and ISO that produce a correct exposure.
2
Change one setting
Adjust one variable (e.g., change aperture for different DoF) and the tool calculates equivalent values for the others.
3
Add ND filter
Select an ND filter strength to calculate the required shutter speed for long exposures.
4
View equivalents
See a table of all equivalent exposure combinations.

For ND filter calculations, use bulb mode if the calculated shutter speed exceeds 30 seconds.
Each full stop of ND filter doubles the required exposure time (ND2 = 1 stop, ND1000 = 10 stops).
Reciprocity failure may affect very long exposures on film - add extra time for exposures over 1 second.