Time Duration Calculator

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Age Calculator by Birthday

Calculate your exact age in years, months, and days from your birthday

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Days Between Dates Calculator

Find the exact number of days between any two dates

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Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates

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Day of the Week Calculator

Find what day of the week any date falls on

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World Timezone Converter

Convert times across different world timezones instantly

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Business Days Calculator

Count business days between dates, excluding weekends and holidays

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Date Format Converter

Convert dates between ISO, Unix, MM/DD/YYYY, and all formats

⏳

Countdown Timer

Live countdown to any target date and time

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ISO Week Number Calculator

Find ISO week number, day of year, quarter, and leap year info

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Stopwatch & Timer

Online stopwatch with lap times and a countdown timer — no install needed

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Pomodoro Timer

Focus timer using the Pomodoro Technique. 25-min sessions with short and long breaks

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Timezone Meeting Planner

Find the best meeting time across multiple time zones with overlap visualization

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Date Add/Subtract

Add or subtract days, weeks, months, years from any date.

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Meeting Time Planner

Plan meetings across multiple time zones with city-by-city local times.