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Photography Exposure Value (EV) Calculator

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Processo Automático

Solve For

Aperture (f)

Shutter Speed

ISO

Target Exposure

Target From

How to set the target EV when solving for a missing setting

Scene Preset

Brightness at ISO 100 (Sunny 16 family)

Target EV (ISO 100)

Negative numbers allowed for very low light

SAÍDA

Lado cliente

Resultado

Propriedade	Valor
EV (at chosen ISO)	-
EV at ISO 100	-
Light Value (LV)	-
Closest scene	-

Equivalent Exposure Combinations

Same exposure (same EV) — different creative trade-offs. The current pick is highlighted.

Aperture	Shutter	ISO	Efeito
O resultado aparecerá aqui

Scene EV Reference (Sunny 16 Family)

Approximate EV values at ISO 100 for common lighting conditions.

EV	Cena	Exemplo
16	Snow / bright sand	Beach, ski slope at noon
15	Sunny (Sunny 16)	f/16, 1/ISO at midday sun
14	Hazy sun	Soft shadows under thin clouds
13	Cloudy bright	Bright overcast, no hard shadows
12	Overcast	Heavy cloud cover
11	Open shade	Subject in shadow, sky open
10	Sunset	Just after sunset, bright sky
9	Outdoor twilight	Sky still glowing, no direct sun
8	Brightly lit street	City night, strong sodium lights
7	Indoor bright	Offices, stores, well-lit rooms
6	Indoor average	Living room, soft lamps
5	Indoor dim	Restaurants, bars, mood lighting
4	Christmas lights	Fireworks, lit fountains
3	Neon signs	Las Vegas-style signage
2	Candlelight close-up	Single candle, 1 m away
1	Bright moonlight	Subject lit by full moon
0	Full moon landscape	Distant landscape under full moon
-3	Quarter moon	Quarter moon on landscape
-6	Starlight	No moon, clear night sky

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Guia

Photography Exposure Value (EV) Calculator

Dial in the exposure triangle without leaving the browser. Pick any two of aperture, shutter speed, and ISO and the calculator solves for the third, displays the resulting EV, and lays out every equivalent combination at the same exposure. A built-in scene reference based on the classic Sunny 16 rule helps you start from real-world lighting instead of guessing.

Como usar

Choose what you want to Solve For — aperture, shutter speed, ISO, or just EV.
Set the two settings you already know from the standard 1/3-stop dropdowns.
Escolha um scene preset (Sunny 16, overcast, indoor, moonlight, etc.) or enter a manual target EV at ISO 100.
Read the result and the EV summary, then explore equivalent exposure combinations to balance depth of field, motion blur, and noise.

Características

Solve for any variable – pick aperture, shutter, ISO, or compute EV directly from all three.
1/3-stop precision – aperture, shutter, and ISO dropdowns match real camera dial steps from f/1.0 to f/32 and 1/8000 s to 30 s.
Scene presets – 19 lighting situations from snow at noon (EV 16) to starlight (EV -6) based on the Sunny 16 family of rules.
Equivalent exposure table – every combination that produces the same EV, with depth-of-field and motion hints for each row.
EV, EV₁₀₀, and Light Value – three readouts in one place, with the closest matching scene called out automatically.
Puro lado do cliente – nothing leaves your browser, instant updates as you change settings.

 Perguntas frequentes

What is Exposure Value (EV)?

Exposure Value is a single number that represents a combination of aperture and shutter speed that lets the same amount of light reach the sensor. The formula is EV = log₂(N² / t), where N is the f-number and t is the shutter time in seconds. EV is measured against ISO 100 by convention; raising ISO by one stop is equivalent to adding 1 EV of brightness.
What is the Sunny 16 rule?

The Sunny 16 rule is a meterless exposure shortcut: on a bright sunny day, set the aperture to f/16 and the shutter speed to 1 over the ISO (for example, ISO 100 and 1/100 s). That combination corresponds to roughly EV 15 at ISO 100. The same family of rules extends to cloudy, overcast, shade, and night-time scenes, each one stop apart.
What does equivalent exposure mean?

Equivalent exposures are combinations of aperture, shutter speed, and ISO that all let in the same total amount of light, so they yield the same brightness. They are not visually identical, though: a wider aperture gives a shallower depth of field, a slower shutter shows more motion blur, and a higher ISO adds noise. Photographers swap between equivalents to bias the trade-off toward depth of field, motion, or low-light reach.
Why does each step on a camera dial halve or double the light?

Aperture, shutter speed, and ISO are scaled in stops, which is the photographer's word for factors of two. Doubling the shutter time, opening the aperture by one full stop (for example f/8 to f/5.6), or doubling the ISO each lets in twice as much light. That base-2 relationship is what makes the EV formula a clean logarithm and why the dropdowns step in 1/3-stop increments.
How does ISO change the calculation?

ISO does not change how much light hits the sensor; it changes how much amplification is applied to the captured signal. In the EV formula it adds a log₂(ISO/100) term, so doubling the ISO bumps the effective EV up by one. Practically, that means a higher ISO lets you shoot at a smaller aperture or faster shutter for the same scene, at the cost of more digital noise.