usepreciso
Built for Everyone
Fast, accurate, and always free. From timezone conversion to date calculations - every tool you need, all processing in your browser.
600+
Timezones supported
Free
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All Tools
9 live · 0 coming soonTimezone Converter
Convert time between any two timezones. Live world clock included.
Date Calculator
Days between dates, working days, add or subtract from any date.
Unix Timestamp
Convert Unix timestamps to readable dates and back.
Age Calculator
Calculate exact age in years, months, and days from a birthdate.
Meeting Planner
Find the best meeting time for participants across different timezones.
Countdown Timer
Count down to any date or track time with stopwatch and lap support.
ISO 8601 / RFC 3339
Validate and build ISO 8601 and RFC 3339 date strings from parts.
World Clock
View current time worldwide with interactive map and grid view.
DST Tracker
Track Daylight Saving Time transitions and clock changes worldwide.