Free tools for time & date calculations and conversions. All tools run in your browser with no data sent to any server.
13
Tools
Free
Forever
100%
Private
All Time & Date Tools
Age Calculator
Calculate age from a birthdate
Date Difference Calculator
Calculate days between two dates
Time Zone Converter
Convert time between time zones
Time Zone Offset Visualizer
Visualize UTC offsets and time differences across multiple time zones
Working Days Calculator
Count business days between dates with holiday exclusions
Week Number Calculator
Find ISO week number for a date
Unix Timestamp Converter
Convert between Unix time and readable date
Date Add/Subtract Calculator
Add or subtract days, weeks, months from dates
Day of Week Calculator
Find what day any date falls on
Time Zone Overlap Finder
Find overlapping working hours across multiple time zones
Time Add/Subtract Calculator
Add or subtract time durations (hours, minutes, seconds) from a time
Weekend Days Between Dates
Count Saturdays and Sundays in any date range
Weekday Calculator
Find the day of the week for any date with holiday detection and calendar view