日数計算機
概要 日数計算機
2つの日付間の日数を計算したり、日付に日数を加減算したりできます。無料の日付計算機です。Related Tools
Frequently asked questions
Does this include or exclude the start and end date?
The calculator counts full calendar days between the two dates you enter - useful for deadlines, countdowns, and duration tracking.
Can I calculate days between dates in different years?
Yes - enter any two dates, past or future, in any year, and the calculator handles the full span including leap years correctly.
Can I use this to count business days only?
This calculator counts total calendar days including weekends - for business-day-only counts you'd need to subtract weekends and holidays manually.
