Exposure Triangle Calculator
Balance ISO, aperture (f-stop), and shutter speed with equivalent exposure settings. Change one exposure triangle value and see the matching settings that preserve the same EV.
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About Exposure Triangle Calculator
The Exposure Triangle Calculator helps photographers rebalance ISO, aperture, and shutter speed without losing the intended exposure value. Enter a starting camera setting, change one corner of the triangle, and the calculator shows equivalent exposure settings that keep the same EV while explaining the depth of field, motion blur, and noise tradeoffs.
How to Use the Exposure Triangle Calculator
- Enter the aperture, shutter speed, and ISO from your current or metered camera settings.
- Select whether you changed aperture, shutter speed, or ISO, then enter the new value for that setting.
- Click Balance Exposure to see how many stops the change adds or removes and which settings preserve the same EV.
- Choose the equivalent option that best fits your depth of field, motion blur, and image noise goals.
Exposure Triangle Formula
Equivalent exposure is based on exposure value at ISO 100. The calculator uses shutter time in seconds and the f-number as the aperture value.
When two settings change in opposite directions by the same number of stops, the EV stays the same. For example, opening from f/4 to f/2.8 adds one stop of light, so moving from 1/125 s to 1/250 s removes one stop and preserves the exposure.
Equivalent Exposure Reference
| Setting | One stop more light | One stop less light | Creative effect |
|---|---|---|---|
| Aperture | Lower f-number, such as f/4 to f/2.8 | Higher f-number, such as f/4 to f/5.6 | Depth of field and lens rendering |
| Shutter speed | Longer time, such as 1/250 to 1/125 | Shorter time, such as 1/250 to 1/500 | Motion blur and camera shake |
| ISO | Higher ISO, such as ISO 200 to ISO 400 | Lower ISO, such as ISO 200 to ISO 100 | Noise, dynamic range, and highlight headroom |
FAQ
What is the exposure triangle?
The exposure triangle is the relationship between aperture, shutter speed, and ISO. Aperture controls how much light enters the lens, shutter speed controls how long light is collected, and ISO controls signal gain. A balanced triangle gives the desired brightness for the scene.
How do I keep the same exposure after changing aperture?
If you open the aperture by one stop, use a shutter speed one stop faster or an ISO one stop lower. If you close the aperture by one stop, use a shutter speed one stop slower or an ISO one stop higher.
Does changing ISO change EV?
Changing ISO changes the camera setting needed for the same scene EV. The calculator keeps the scene exposure value equivalent by adjusting shutter speed or aperture around the new ISO.
What is one stop of exposure?
One stop means a doubling or halving of light. Doubling shutter time adds one stop, doubling ISO adds one stop, and changing aperture by a factor of about 1.414 changes one stop.
Why are equivalent settings not always creatively equivalent?
Equivalent settings can have the same brightness but different visual results. Aperture changes depth of field, shutter speed changes motion blur, and ISO changes noise and dynamic range.
Reference this content, page, or tool as:
"Exposure Triangle Calculator" at https://MiniWebtool.com/exposure-triangle-calculator/ from MiniWebtool, https://MiniWebtool.com/
by miniwebtool team. Updated: 2026-05-01