ToolForge

露出計算機

Exposure calculator: calculate EV and equivalent combinations from aperture, shutter and ISO for photography, with one-click copy and offline.

使い方

絞り・シャッター・ISO を入力すると EV を計算。

Overview

Exposure Calculator is a Photography tool. Calculate EV and equivalent combinations from aperture, shutter and ISO for photography, with one-click copy and offline. It runs 100% in your browser with no upload, so you get instant results with privacy. Whether you need a quick answer or batch processing with precise control, you can enter, validate and export in seconds. The UI is responsive on mobile, tablet and desktop and supports one-click copy.

Use cases

  • Daily use of Exposure Calculator: Enter aperture, shutter and ISO to get EV and equivalents. — enter and get instant results without manual lookup.
  • One-click copy keeps results ready to save, check or share with family and pros.
  • Use Exposure Calculator offline or on poor network — all calculations stay local and private.
  • Convert shutter times when picking ND stops for long exposures
  • Compare equivalent focal lengths to choose lenses

How to use

  1. 1 Enter aperture, shutter and ISO to get EV and equivalents..
  2. 2 Review depth, exposure or equivalents and tweak
  3. 3 Verify with a test shot and compensate if needed
  4. 4 Save favorite combos for reuse

Highlights

  • Local & private: processing stays in your browser
  • Live validation with tolerant parsing
  • One-click copy and export for docs, code or sheets
  • Batch and offline support under poor network

Notes

  • Trust the histogram in backlit high-contrast scenes
  • Equivalents compare across formats; real aperture rules bokeh
  • Theory only—lens variance and filters shift results

FAQ

Phones too?
Yes. Enter equivalent focal length and aperture.
A stop off from real shots?
Metering mode and contrast—compensate and reshoot.
How is Exposure Calculator different?
It runs locally with a focus on speed and privacy, plus tolerant parsing for “exposure” and one-click copy for reuse.
Can I use results in official reports?
Use it as a working draft and cross-check with authoritative sources; keep the exported log and parameters for traceability.
Tip：Tip: Bookmark this page or pin the tab; find related tools via categories and search.
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すべての計算はブラウザ内で実行され、データはアップロードされません。