Example input and settings
2026-01-28
2026-02-03Date & time · DAT-02Submit an issue
Date calculator
Compare dates in days, weeks, months, hours, minutes and seconds. Copy each result or add and subtract whole days.
Date difference · Add / Subtract daysStart date
1
1
2026
End date
12
31
2026
OutputClick a row to copy its value
Convert, compare and calculate
Choose the interval mode for separate days, weeks, months, hours, minutes and seconds. Click a row to copy its value; reversed dates show an absolute interval. 2026-01-01 to 2026-12-31 is 364 days: 52 weeks, 11 calendar months and 30 days, or 8736 hours. Add/subtract uses signed whole days.
Check the input format and options with this example before using your own data. Random values, file sizes and presentation vary with the input and settings.
What to check in the result
6 daysWorked examples
Days between dates and date arithmetic
Switch between date difference and date shift modes to calculate across month and year boundaries.
Find days between two dates
January 28, 2026 to February 3, 2026 is a difference of 6 days.
Add days to a date
March 15, 2026 plus 30 days is April 14, 2026.
Subtract days from a date
Enter -20 in date shift mode: March 15, 2026 minus 20 days is February 23, 2026.