Three related tools on one page — find someone's exact age, the time between any two dates, or convert a time between any two time zones.
Pick the tab that matches what you're trying to work out.
Useful when you need more than just someone's age in years — you can choose a specific date to see exactly how old someone was at that point in time, helpful for applications, registrations, memberships, school records, or other situations where an exact age matters.
Example: birth date 1995-07-15, checked as of 2025-01-01 — 29 years 5 months 17 days. This lets you calculate age on a past or future date instead of relying only on today's date.
Another example: birth date 2000-03-10, checked as of 2026-09-13 — 26 years 6 months 3 days, having lived 9,683 total days.
Example: 2010-09-19 to 2022-01-10 — 11y 3m 22d. Total: 4,131 days (590 weeks).
Another example: 2025-01-01 to 2025-04-01 — 3 months. You can also use the Today button when one of the dates is the current date.
Example: São Paulo, Wed Sep 03 2025, 12:20 → Amsterdam, Wed Sep 03 2025, 17:20 — difference: +5 hours.
For example, if an online meeting is scheduled for 10:00 AM in New York, you can use the converter to determine the corresponding time in London, Mumbai, Dubai, Singapore, or another location, helping avoid confusion when arranging calls across countries.
This makes the tool useful for everyday date calculations, planning, work, travel, international communication, and scheduling.
Disclaimer: Results are calculated directly from the dates and times you enter. Time zone conversions reflect standard offsets and do not account for regional daylight-saving changes that may occur after this page was last updated. Please verify all calculations independently — we do not carry any liability for errors, and this calculator may make mistakes. This tool does not provide financial, investment, tax, or legal advice.