Time & Date Tools
Every calculator and converter on timedateworld, in one place. They run instantly in your browser — nothing to install, nothing to sign up for.
World Clock
Live time for every country and major city, updated every second.
OPEN →Calendar
A clean monthly calendar you can browse and print, with today highlighted.
OPEN →Calculator
A fast online calculator for everyday sums, percentages and quick maths.
OPEN →Age Calculator
Find your exact age in years, months, days, hours and seconds.
OPEN →Countdown Timer
Count down to any event — Eid, New Year, an exam or a birthday.
OPEN →Date Difference
Count the days, weeks and months between any two dates.
OPEN →Working Days
Count business days between two dates, skipping weekends.
OPEN →Time Zone Converter
Convert a time from one city to another across the globe.
OPEN →Stopwatch
A precise online stopwatch with lap times — no download needed.
OPEN →Unix Timestamp
Convert Unix epoch timestamps to a human date and back, live.
OPEN →Time Duration
Find the hours and minutes between two times, or add time to a clock.
OPEN →Day of the Week
Find which weekday any date falls on, plus week number and day of year.
OPEN →One tidy toolbox for time, dates and quick maths
Most questions about time and dates fall into a handful of shapes, and this collection is built to answer each one cleanly. When you need to know how long something is — your age, the gap between two dates, the business days in a project — there is a calculator tuned for exactly that. When you need to look forward, the countdown timer turns a distant date into a live tally of days, hours and seconds. When you need to look across the globe, the world clock and time-zone converter keep everyone on the same moment. And for the small, everyday jobs, the calendar and the plain calculator are always a click away.
What each tool is best at
The world clock shows live local times across the planet, while the time-zone converter pins down a single moment in two cities at once. The age calculator and the date-difference calculator both measure spans, but the first starts from your birthday and counts up, and the second measures between any two dates you choose. The working-days calculator is the one to reach for whenever an estimate is quoted in business days, because it removes weekends from the count. The calendar gives you a clean monthly view you can print, the calculator handles everyday sums and percentages, the stopwatch times anything from a workout to a speech, and the Unix timestamp converter translates the machine format that powers most software back into a human date.
The same promise behind all of them
Every tool here shares one principle: it should be instant, honest and private. Each runs entirely in your browser, so there is no waiting on a server and nothing you enter is sent anywhere. They also handle the awkward details for you — leap years, uneven month lengths, weekends, daylight saving — so you can trust the answer without checking it by hand. Pick a tool above to get started, or use the search box at the top of any page to jump straight to the one you need. If there is a tool you wish existed, the contact page is the place to ask, and the toolbox keeps growing.