Every date and time calculation, in seconds.
Find your exact age, count the days between any two dates, run a countdown, or convert time zones. Fast, accurate, and free forever.
Try it now: Age Calculator
Enter your date of birth to see your exact age instantly.
What time is it around the world?
Live clocks, updating every second.
Our Tools
Five focused tools that do one job well. Pick one and get your answer.
Age Calculator
Your exact age in years, months, and days, plus total days lived and birthday countdown.
Use tool →Date Difference Calculator
Count the days, weeks, or months between any two dates, or add days to a date.
Use tool →Countdown Timer
Set any future date and watch the live countdown in days, hours, minutes, and seconds.
Use tool →Stopwatch
A clean online stopwatch with lap times. Great for workouts, study sessions, and races.
Use tool →Time Zone Converter
Convert any time between world time zones instantly. Never miss a meeting again.
Use tool →Free Forever
Every tool is free with no limits, no trials, and no hidden paywalls.
No Sign-Up
Nothing to install and no account needed. Your dates never leave your browser.
Works Everywhere
Designed mobile-first. Every tool works perfectly on phones, tablets, and desktops.
Learn How It Works
Short guides that explain the math behind the tools.
How to Calculate Your Exact Age
The manual method, step by step, with a worked example.
What Is a Leap Year?
Why February sometimes has 29 days, and the simple divisibility rules.
AM/PM vs 24-Hour Clock
Convert between 12-hour and 24-hour time without confusion.
How to Count Days Between Two Dates
The manual counting method, plus common mistakes to avoid.
How Many Days Are in a Year?
365 or 366? When each applies, and why it matters.
Time Zones Explained
UTC, GMT, and daylight saving, in plain language.
When Does Daylight Saving Time End in 2027?
Daylight saving ends November 7, 2027. The full 2027 schedule and what changes.
Common Questions
Quick answers about our tools.
Are these tools really free?
Yes. Every calculator and timer on AgeDateCalc is completely free, with no account, no trial period, and no usage limits.
Do you store my dates or personal data?
No. All calculations happen in your browser. Your dates of birth and other inputs are never sent to our servers or stored anywhere.
How accurate is the Age Calculator?
It accounts for leap years and varying month lengths, and correctly handles February 29 birthdays by celebrating them on March 1 in non-leap years.
Do the tools work on mobile phones?
Yes. The entire site is designed mobile-first, so every tool works smoothly on phones, tablets, and desktop computers.