Time & Date
Ages, gaps between dates, countdowns and time zone questions, answered exactly.
Free time & date calculators from CalculatorWonder. Every tool below runs instantly in your browser, states the formula and assumptions behind the answer, and never stores what you type.
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Age Calculator
Exact age in years, months and days, plus a countdown to the next birthday.
Pick a date of birth and, if you like, a date to measure to. You get the precise age in years, months and days, the total days lived and how long until the next birthday.
The Age Calculator gives an exact age in years, months and days from a date of birth, rather than the rough whole-years figure most of us carry around. Pick your date of birth and, optionally, a date to measure up to — useful for forms, eligibility checks, or working out how old someone was on a particular day. The tool also shows the total number of days lived and a countdown to the next birthday.
Christmas Countdown
Live countdown to Christmas Day — months, weeks, days, hours, minutes and seconds to go, in your timezone.
A real-time countdown to the next Christmas Day (December 25th). Pick your timezone and watch the months, weeks, days, hours, minutes and seconds tick down to midnight on Christmas morning where you are.
The Christmas Countdown is a live timer that counts down to the next Christmas Day, December 25th, from the moment you open the page. It breaks the time remaining into six units — months, weeks, days, hours, minutes and seconds — and updates every second so you can watch the clock tick toward Christmas morning. Once December 25th arrives in your chosen timezone, the countdown automatically rolls over to the following year, so it is always counting down to the next Christmas.
Date Calculator
Count the days, weeks and working days between any two dates.
Useful for deadlines, notice periods, holiday planning and invoicing. Choose a start and end date to see the calendar gap, the number of weeks and the count of weekdays in between.
The Date Calculator counts the gap between any two dates — in calendar days, in weeks, and in working days. It is useful whenever you need to know how long something lasts or how long you have left: project deadlines, notice periods, holiday planning, contract lengths, or invoicing periods that span a range of dates.
Other categories
- Money & Finance — Mortgages, loans, interest, salary and long-term planning maths, worked out in seconds.
- Health & Fitness — Body metrics, energy needs and everyday wellbeing numbers explained in plain language.
- Math & Science — Percentages, fractions, algebra, geometry and physics helpers for homework and work.
- Conversion — Switch between units of length, weight, temperature, volume and currency.
- Business & Productivity — Pricing, margin, break-even and return calculations for people running things.
- Household & Lifestyle — Rent, running costs, utilities and kitchen maths for the place you live in.
- Vehicle & Travel — Fuel economy, car finance and trip budgets before you turn the key.
- Education & Learning — Grades, averages and study finance tools for students and teachers.
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