Date Calculator

Calculate days between dates, business days, added dates, and age locally.

Calculator

BetweenAdd/SubtractAge

Start DateEnd DateInclude end date

Days

364

Weeks

52w 0d

Business days

260

Calendar difference: 0 years, 11 months, 30 days.

All calculations run locally with calendar dates only. No date values are sent to a server.

How it works

Choose what to calculate: days between dates, add/subtract time, business days, or age.
Enter the dates or durations.
Read the result instantly.

Business-day counts use Monday–Friday and don't know your region's public holidays, subtract those separately.
Calculations use your browser's local calendar; be mindful across timezones for exact day boundaries.

It skips weekends (Saturday/Sunday) but not public holidays, which vary by country, account for those yourself.

As the exact elapsed time from the birthdate to the target date, in years/months/days, not just a year subtraction.

No. All date math runs locally in your browser.