Home Time calculator
Time calculator
Add, subtract, measure a span, and turn minutes into decimal hours. The times disappear when this tab closes.
Counted into the next day.
Why this exists
Adding 1 hour 40 minutes to 55 minutes makes a hand reach for 100 instead of 60.
A job that starts at 10 at night and ends in the morning pauses once at midnight.
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01How to use it
Fill the rows under Add and subtract. Add a row when you need another.
Under Between two times, set the start and the end. Turn on dates when the span is longer than a day.
Under Change units, pick minutes, hours and minutes, or decimal hours, then copy the result.
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02What you get
2 hours 15 minutes, minus 30 minutes, plus 1 hour 45 minutes, is 3 hours 30 minutes, 210 minutes, and 3.5 hours.
10 at night to 2 in the morning is 4 hours, with a note that it was counted into the next day.
Entered2 hours 15 minutes − 30 minutes + 1 hour 45 minutes
2h 15m − 30m + 1h 45m 3 hours 30 minutes · 210 minutes · 3.5 hours 22:00–02:00 4 hours · next day 135 minutes 2 hours 15 minutes · 2.25 hours 2.15 hours 2 hours 9 minutes -
03Worth knowing
A negative total keeps a minus in front. That happens when the subtracted rows are larger.
Past 24 hours, the result also shows days.
Times alone stay inside 24 hours. Monday night to Wednesday morning needs the dates.
Copy result puts the clock, the minutes, and the decimal hours on one line.
Questions
- QHow long is 10 at night to 2 in the morning?
- A4 hours. An earlier end is counted as the next day.
- QHow many hours is 135 minutes?
- A2 hours 15 minutes, and 2.25 hours. 100 minutes is not exact, so it shows about 1.67 hours.
- QIs 2 hours 15 minutes the same as 2.15 hours?
- ANo. It is 2.25 hours. 2.15 hours is 2 hours 9 minutes.
- QAre the times saved?
- ANo. They disappear when this tab closes and are not sent to a server.