Free date & time calculators

Every date question, answered instantly.

Days ago, days until, the gap between two dates, and more. Enter a number or pick a date and get the exact answer in every format you need, with the method explained underneath.

    Popular: Days AgoDays SinceDays UntilDate Difference
    No sign-up Runs in your browser 40 tools
    days
    60 days ago was
    September 5, 2026
    Saturday
    2026-09-05 Week 36 Day 248 Q3

    Popular calculators

    The tools people reach for most. Each one works the moment the page loads.

    Days Ago Calculator The exact date a given number of days ago. Open Days Since Calculator How many days have passed since a date. Open Days Until Calculator How many days remain until a date. Open Date Difference Calculator Days, weeks, months and years between two dates. Open Age Calculator Exact age in years, months and days. Open Years Ago Calculator The exact date a given number of years ago. Open Days From Today Calculator Add or subtract days, weeks, months or years. Open Business Days Calculator Working days between dates, weekends skipped. Open Time Zone Converter Convert a time between any two time zones, DST handled automatically. Open Countdown Timer A live countdown to any date and time, updating every second. Open Unix Timestamp Converter Convert Unix time to a date, or a date to a Unix timestamp. Open Hours Ago Calculator The exact time a given number of hours ago. Open Hours From Now Calculator The exact time a given number of hours from now. Open Minutes From Now Calculator The exact time a given number of minutes from now. Open Time Unit Converter Seconds, minutes, hours, days, weeks, months and years. Open Christmas 2026 Countdown How many days until Christmas 2026, counted down live. Open Age Calculator Between Two Dates The exact age between two dates, in years, months and days. Open

    Browse by what you need

    Four ways into the toolset, depending on the question you are trying to answer.

    Relative dates

    What date was it a number of days, weeks, months or years ago.

    5 tools →

    Since & until

    How long since something happened, or how long until it does.

    2 tools →

    Between two dates

    The exact gap between any two dates, in every unit.

    13 tools →

    Unit converters

    Temperature, length, weight and volume, with exact factors.

    9 tools →

    Date planning

    Move forward from a date, work hours, time zones and live countdowns.

    11 tools →

    Built for getting an answer fast

    What you can expect from every calculator on the site.

    Answers as you type

    Results update on every keystroke. There is no submit step and no page reload.

    Every date format

    ISO 8601, US and European ordering, plus weekday, ISO week number, day of year and quarter.

    Calendar edge cases

    Leap years, February 29, month-end clamping and the 400-year century rule are all handled.

    Nothing leaves your device

    The maths runs in your browser. The dates you enter are never sent to a server.

    One question leads to the next

    The date tools are designed to hand off to each other. Start anywhere.

    Days AgoDays SinceDays UntilDate DifferenceDays From Today

    Common questions

    Open the Days Ago Calculator, type the number of days, and the date appears immediately. You also get the weekday, the ISO date, US and European formats, the ISO week number, the day of the year and the quarter.
    They answer opposite questions. "Days ago" starts from a number and gives you a date: you know it was 60 days, you want the date. "Days since" starts from a date and gives you a number: you know the date, you want to know how long it has been.
    No. Four weeks is always exactly 28 days. A calendar month is 28, 29, 30 or 31 days. The two only line up in February of a non-leap year, which is why the site keeps weeks and months as separate tools.
    Yes. Leap years follow the rule that a year divisible by 4 is a leap year, except century years, which must be divisible by 400. So 2000 was a leap year and 1900 was not. Subtracting a year from February 29 clamps to February 28, which is the convention used in contracts and legal age calculations.
    No. There is nothing to sign up for and nothing to install. Every calculation runs in your browser, so the dates you type are never sent anywhere.