時間計算機
Calculate time difference, duration between two times, add or subtract hours and minutes, and convert between time units — all with step-by-step solutions.
計算する
Select a calculation type, enter your values, and click Calculate to see results with step-by-step solution.
結果
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段階的な解決策
完全なユーザーガイド
About This Calculator
This time calculator handles four common time operations: finding the difference between two clock times, adding or subtracting a duration from a time, converting between time units (seconds, minutes, hours, days, weeks), and calculating the duration between a start and end time — with automatic midnight-crossing support.
4 Calculation Types
時差
Find the exact difference between two clock times in hours, minutes, and seconds.
Add / Subtract
Add or subtract hours, minutes, seconds, or days from any clock time.
単位の変換
Convert between seconds, minutes, hours, days, and weeks.
間隔
開始から終了までの時間を計算します。夜間/深夜の横断に対応します。
Key Formulas
Difference: |Time₂ − Time₁| (in seconds)
追加： Time + Amount → mod 86400
Convert: Value × FromFactor ÷ ToFactor
間隔： End − Start (または 86400 − Start + End)
重要な注意事項
- 24 時間形式を使用します: 0:00 ～ 23:59。たとえば、午後 2 時 30 分 = 14 時 30 分です。
- Duration handles midnight crossing: Start 22:00, End 06:00 = 8 hours.
- 加算/減算は約 24 時間でラップされます。午前 0 時を過ぎると 24 時間が追加されます。
- 1 日 = 86,400 秒、1 週間 = 604,800 秒。