FreeDev Tools

Duration Converter

Convert durations between seconds, minutes, hours, days β€” parses 1:30:00 and "1h 30m" too.

Runs locally in your browser. Your input is not uploaded.

How to Use

  1. 1

    Enter durations

    One per line: plain numbers, 1:30:00 clock format, or "2h 45m 10s".

  2. 2

    Set the default unit

    Choose what plain numbers mean β€” seconds, minutes, hours, days, or weeks.

  3. 3

    Read the conversions

    Each duration is shown as human text, HH:MM:SS, and in every time unit.

Frequently Asked Questions

Plain numbers (interpreted by the unit dropdown), clock format like 1:30:00, and natural text like "2h 45m 10s" or "90m". Each line is parsed independently.