Duration Calculator 計算機

この計算機は扱います: Calculate elapsed time between a start and end clock time.

Time 更新 2026-05-11

入力

Start hour (0-23) Start minute (0-59) End hour (0-23) End minute (0-59)

Duration (hours) 値を入力して計算します。

Duration (minutes) 値を入力して計算します。

duration minutes = end time minutes - start time minutes; add 24 hours if the end time crosses midnight.

この計算機は扱います: Calculate elapsed time between a start and end clock time.

09:15 to 17:45 is 8.5 hours or 510 minutes.

Cross-midnight times are treated as ending the next day.

Use the date calculator when dates also matter.

What inputs does this calculator need?

Start hour, Start minute, End hour, End minute.

How should I round the result?

Keep extra digits while comparing values, then round for the final decision or report.

Can I reuse the result in another calculation?

Yes, but preserve the original inputs and units so the next calculation stays traceable.