hmcal

What is hmcal?

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.