以下のガイドはまだ日本語に翻訳されていないため、英語で表示しています。計算機自体はすべて日本語に対応しています。
この計算機の使い方
- Enter a value.
- Choose the from and to units.
計算式
Seconds, minutes, hours, days and weeks have fixed lengths. Months and years vary, so average Gregorian values are used.
1 day = 86,400 s; 1 week = 7 days
1 year (average Gregorian) = 365.2425 days
1 month (average) = 30.436875 days
Examples
- 90 minutes ÷ 60 = 1.5 hours.
- 1 million seconds ≈ 11.57 days.
よくある質問
Why isn't a month exactly 30 days?
Calendar months have 28–31 days. For conversion, the average month (1/12 of an average year) is used.
How do I add up hours and minutes?
Use the time calculator to add or subtract durations.
What about leap seconds?
They are ignored, as in most everyday time calculations.