Crop Ratio Calculator

Image crop ratio calculator: enter original size and target ratio to get crop dimensions and keep area with preview for social and print, one-click copy and offline.

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Enter original dimensions and target ratio to get crop size instantly.

Overview

Crop Ratio Calculator is a image tool that Image crop ratio calculator: enter original size and target ratio to get crop dimensions and keep area with preview for social and print, 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

Crop/compress for social
Check DPI and color mode for print
Generate placeholders and watermarks
Batch convert PNG/JPG/WebP
Use it to cross-check “图片裁剪、裁剪比例” in reports, docs or APIs to avoid manual conversion errors

How to use

1 Drop images
2 Adjust size/quality/format
3 Compare before/after
4 Download or copy link

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

Quality 70-85 balances size and fidelity
Process large images in batches
JPG drops alpha

FAQ

Batch?

Yes, multi-select or folder drop.

Uploaded?

No, processing is local.

How is Crop Ratio Calculator different?

It runs locally with a focus on speed and privacy, plus tolerant parsing for “图片裁剪、裁剪比例” 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 (convert → calculate → export).

All calculations run locally in your browser; nothing is uploaded.