mycalculator.com.au logomycalculator.
Engineering ToolNew

ISO Camera Exposure, Shutter Speed, Aperture & EV Calculator

Calculate Exposure Value (EV₁₀₀), scene illuminance (Lux), and balanced camera exposure triangle settings.

Last reviewed by the myCalculator Editorial Team

Input Parameters

f/

e.g. 1.4, 2.0, 2.8, 4.0, 5.6, 8.0, 11, 16, 22

s

e.g. 0.008 for 1/125s, 0.004 for 1/250s, 0.001 for 1/1000s, 1.0 for 1 sec

Calculation Results

Standard Exposure Value (EV₁₀₀)
EV 9 (Scene: Typical Home Interior / Restaurant Lighting)
Current Camera Settings EV
EV 11 @ ISO 400
Estimated Scene Illuminance
1,250 Lux (116.1 Foot-Candles)
Camera Exposure Triangle
f/4 | 1/125s | ISO 400
Sunny 16 Rule Benchmark
f/16 @ 1/400s for EV 15 direct sunlight
Summary: Shooting at f/4, 1/125s, and ISO 400 yields an Exposure Value of EV₁₀₀ 9 (~1,250 Lux). This corresponds to Typical Home Interior / Restaurant Lighting.
Step-by-Step Calculation Solution
1.Base EV = log₂(N² ÷ t) = log₂((4)² ÷ 0.008s) = 10.97
2.EV₁₀₀ = Base EV - log₂(ISO ÷ 100) = 10.97 - log₂(400 ÷ 100) = EV 8.97
3.Estimated Illuminance (Lux) = 2.5 × 2^(EV₁₀₀) = 2.5 × 2^(8.97) = 1250 Lux

Next: related Engineering calculators

Concrete Volume & Bag Calculator illustration
Engineering
Popular
AS/NZS Aligned Formula Accurate

Concrete Volume & Bag Calculator

Estimate concrete volume for house slabs, footings, steps, and posts.

mycalculator.com.auOpen
Topographic Map Scale Calculator illustration
Engineering
New
AS/NZS Aligned Formula Accurate

Topographic Map Scale Calculator

Calculate real-world ground distances from topographic maps using standard scales (1:25,000, 1:50,000, 1:100,000).

mycalculator.com.auOpen
Contour Slope & Gradient Calculator illustration
Engineering
New
AS/NZS Aligned Formula Accurate

Contour Slope & Gradient Calculator

Determine terrain steepness, gradient percentage, and slope angle from topographic map contour intervals and horizontal distance.

mycalculator.com.auOpen

Formula & How ISO Camera Exposure, Shutter Speed, Aperture & EV Calculator Works

Mathematical Formula
Base EV = log₂(N² ÷ t) | EV₁₀₀ = Base EV - log₂(ISO ÷ 100) | Lux ≈ 2.5 × 2^(EV₁₀₀)

Exposure value combines aperture and shutter speed: EV = log₂(N² ÷ t). At f/4 and 1/125 s (0.008 s), EV = log₂(16 ÷ 0.008) = log₂(2,000) = 10.97. At ISO 400 the equivalent EV at ISO 100 is 10.97 − log₂(4) = 8.97, which corresponds to roughly 2.5 × 2^8.97 = 1,250 lux of scene illumination. Each EV step is a doubling or halving of light, so you can trade aperture, shutter and ISO while keeping the exposure the same. The result is a guide: a light meter reading is more accurate and the calculator is useful for planning and teaching exposure.

How to Calculate ISO Camera Exposure, Shutter Speed, Aperture & EV Calculator (Step-by-Step)
  1. Enter ISO Film / Sensor Sensitivity: Input your target parameter value.
  2. Enter Lens Aperture (f-stop) (f/): Input your target parameter value.
  3. Enter Shutter Speed (Seconds) (s): Input your target parameter value.
  4. Apply Formula: Calculate using Base EV = log₂(N² ÷ t) | EV₁₀₀ = Base EV - log₂(ISO ÷ 100) | Lux ≈ 2.5 × 2^(EV₁₀₀).
  5. Review Results: View exact computed answers, metrics, and worked mathematical proofs.
Free Publisher & Webmaster Asset

Need this calculator for your blog, publication, or client portal?

Get pre-formatted embed codes, Markdown citations for forums (Reddit/Whirlpool), or HTML anchor tags free.

Cite this Calculator

Are you using our calculation results for a university assignment, research paper, or academic report? Use the auto-generated citations below to accurately reference this tool in your bibliography.

APA 7th Edition

MyCalculator.com.au. (2026). ISO Camera Exposure, Shutter Speed, Aperture & EV Calculator. Retrieved October 24, 2026, from https://www.mycalculator.com.au/calculators/engineering/iso-camera-exposure

Harvard (Standard)

MyCalculator.com.au. (2026) 'ISO Camera Exposure, Shutter Speed, Aperture & EV Calculator'. Available at: https://www.mycalculator.com.au/calculators/engineering/iso-camera-exposure (Accessed: 24 October 2026).

Frequently Asked Questions (FAQs)

What is the Sunny 16 Rule in photography?

The Sunny 16 rule states that on a bright sunny day, with your aperture set to f/16, your shutter speed should be the reciprocal of your ISO (e.g., at ISO 100, use 1/100s at f/16 for an EV 15 exposure).

Free Embed Generator & Publisher Widget

Embed ISO Camera Exposure, Shutter Speed, Aperture & EV Calculator on Your Site

Offer your readers, students, or clients interactive calculations. Fast, responsive, and 100% free with no login required.

Widget Customizer

650px

Recommended for publishers & educational portals to provide source citation.

Live Embed PreviewAspect Ratio: Responsive (100% × 650px)
Calculated via mycalculator.com.au — Free Australian Calculator Hub
Official Regulatory & Government Data Sources

Authoritative Standards & Verified Reference Citations

Independent & Verified

Calculations and mathematical logic on this page are grounded in published statutory rules, regulatory standards, and official government data published by the following bodies:

Standards AustraliaOfficial Standard
Peak Non-Government Standards Organization

Australian Standards including AS/NZS 3000 (Wiring Rules), AS 3600 (Concrete Structures), and AS 4100 (Steel Structures).

www.standards.org.au
Engineers AustraliaIndustry Partner
National Engineering Professional Body

Accreditation and technical guidelines for civil, structural, mechanical, and electrical engineering.

www.engineersaustralia.org.au
SponsoredMortgage Hub

Dedicated Australian home loans, borrowing capacity, mortgage repayments & refinance modeling.

Advertise here →