Stopwatch
A precise online stopwatch with lap times.
Date & Time Tools
8 free tools
Add or subtract dates, calculate ages and date differences, convert Unix timestamps and time zones, and use an online stopwatch and countdown timer.
All 8 date & time tools
Countdown Timer
Set a countdown with an audible alert when time is up.
Age Calculator
Calculate exact age in years, months, days and more.
Date Calculator (Add & Subtract)
Add or subtract days, weeks, months and years from a date, with an optional business-days mode.
Localized Date Formats
See how a date is written in 30+ countries and languages, plus ISO 8601, RFC 2822 and Unix formats.
Unix Timestamp Converter
Convert Unix timestamps to human dates and back.
Date Difference Calculator
Count days, weeks and business days between two dates.
Time Zone Converter
Convert a time between time zones around the world.
Explore other categories
Text & SEO Tools
24 tools
HTML Tools
9 tools
Image Tools
23 tools
PDF Tools
9 tools
CSS Tools
17 tools
Coding Tools
17 tools
Encoders & Decoders
8 tools
Color Tools
11 tools
Data Generators
12 tools
Converters
7 tools
Network Tools
5 tools
Date & Time Tools
8 tools
Unit Converters
8 tools
Basic Math Calculators
7 tools
Health & Body Calculators
12 tools
Everyday Financial Calculators
19 tools
Social Media Tools
16 tools
Miscellaneous Tools
1 tools