Time Calculator Online

✓ Calculadora gratis de duración de tiempo y suma de intervalos

Calculate the difference between dates, convert time units, and add or subtract dates — free, instant, and fully in your browser.

• 📅 Date Difference — Get the exact years, months, and days between two dates plus total days, hours, minutes, and seconds.
• 🔄 Time Unit Conversion — Enter a value in any unit and instantly see it in seconds, minutes, hours, days, weeks, months, and years.
• ➕ Date Add & Subtract — Add or subtract any amount of time from a start date and get the target date with its weekday.
• 🎯 Calendar Accurate — Interval math respects leap years and the real length of each month, not just rough averages.

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