Date & Time Calculators
Calculate the days between two dates, your exact age, business days, durations, week numbers, time zones and more. Every date and time tool on WorldCalcs runs instantly in your browser — no sign-up and nothing is stored. Pick a calculator below to get started.
Date Difference
Days, weeks, and years between two dates.
Age Calculator
Your exact age in years, months, and days.
Days Until Date
Countdown to any future date.
Time Zone Converter
Convert times across world time zones.
Add / Subtract Date
Add or subtract days, weeks, months or years from a date.
Business Days
Working days (Mon–Fri) between two dates.
Time Duration
Hours and minutes between two times.
Week Number
ISO 8601 week number for any date.
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