Convert milliseconds, seconds, minutes, hours, days and weeks.
Type or paste on the left — the result updates as you type.
A day is exactly 24 hours and a week exactly 7 days here. Calendar months and daylight-saving changes are not durations of fixed length.
Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.
Tool page updated: 2026-09-27
