hmcal

What it does

hmcal is a lightweight, client-side duration calculator designed for fast time arithmetic. It handles mixed-unit expression inputs like 4h20m*7+30m, 1:20:00+2:15, or (20m+30m)*2 in real time, converting everything instantly into D HH:MM:SS, minutes, and seconds. 100% local, privacy-focused, zero tracking, and no server requests.

Free browser time calculator: add, subtract, multiply, or divide durations. Runs 100% locally — no account, no upload.

Time calculator: add, subtract, multiply, or divide durations. Enter 4h20m*7+4h20m-24h to getfrom brucencnp.com

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