Date & Time Calculators

Exact calendar math for ages, day counts, deadlines, and date arithmetic, with leap years handled.

Calculate your exact age in years, months, and days from your date of birth, plus total days lived and days until your next birthday.

Count the exact number of days between two dates, including or excluding the end date, with the result also shown in weeks, months, and years.

Add or subtract days, weeks, or months from any date to find the resulting calendar date. Ideal for deadlines, notice periods, and due dates.

Count the business days (Monday to Friday) between two dates. Useful for delivery estimates, contract deadlines, and payroll periods.

Calculate the hours and minutes between two clock times, including overnight shifts, with the result also shown as decimal hours for timesheets.