Date & Time
Free online date and time tools to calculate age, date differences and work with timestamps.
Work with dates the practical way: calculate your exact age, measure the gap between two dates, convert Unix timestamps and count business days. All calculations run locally in your browser.
Age Calculator
Free age calculator that shows exact age in years, months and days from a date of birth. Also gives total days, weeks and hours.
Date Difference Calculator
Free date difference calculator to find the exact time between two dates in years, months, days, weeks and hours.
Unix Timestamp Converter
Free Unix timestamp converter. Convert between epoch seconds and human-readable dates, both directions, locally.
Time Zone Converter
Free time zone converter. Convert a clock time between world time zones with correct daylight-saving handling.
Business Days Calculator
Free business days calculator. Count working days between two dates, skipping weekends and optional holidays.
Frequently asked questions
How is the date difference calculated?
The calculator counts full days between two calendar dates, then breaks the total down into years, months and days. Time-of-day is ignored unless a time field is provided.
What is a Unix timestamp?
A Unix timestamp is the number of seconds since 1 January 1970, 00:00:00 UTC. Developers use them to store time compactly; the converter turns them into readable dates in your time zone.
How do I count business days between two dates?
Provide a start and end date plus the working days per week. Weekends are excluded, which is handy for SLAs, loan terms and delivery estimates.