Unit Converter
Date Calculator
Calculate days, weeks, and approximate months between two dates for planning and scheduling.
Formula and usage notes
Use the date calculator for deadlines, project timelines, travel windows, subscriptions, and event planning.
The day count uses UTC calendar dates to avoid daylight-saving time shifts. Weeks are days divided by 7; months are an approximate planning view.
Practical examples
Practical examples 1
2026-01-01 to 2026-01-31 = 30 days
Practical examples 2
14 days = 2 weeks
Practical examples 3
Use it to count days until a deadline
Practical examples 4
Use it to compare trip start and end dates
Frequently asked questions
Does it count both start and end date?
The main day difference counts elapsed days from start to end. Add one day if your workflow needs inclusive counting.
Why are months approximate?
Months have different lengths, so a simple month value is best used for planning only.
Can end date be before start date?
Yes. The result shows a negative direction so you can catch reversed dates.