CalcLock
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A little maths. A clearer plan.

Estimate your collection’s size before moving anything. Adjust the assumptions to match your actual files.

Collection estimate

0–1,000,000 photos
Use a sample from your files
Total duration, not file count
Varies by format and quality

Defaults are illustrative assumptions, not measured iPhone file sizes. No files are selected or uploaded.

Before you import

A preparation checklist, not a security score.

0 of 4 preparation steps reviewed. Keep this checklist beside you while testing with disposable files.

How the estimate works

Photos × average photo size, plus total video minutes × size per minute. The result uses decimal gigabytes: 1 GB = 1,000 MB. We add an optional 20% planning allowance to show a little extra room, not a guarantee of sufficient free space.

Actual use depends on your files and the app’s storage behavior. Some workflows temporarily retain multiple copies during import. Check your device’s available storage and test a small batch first.

Your inputs stay in this page

This tool calculates in your browser. It does not select, read or upload photos, send the counts to an analytics service, or save your answers after you leave. The hosting service still processes ordinary page requests.