Age calculator, date math and live countdowns.
DaysTo is a set of fast, private calculators for every date question you have. Work out an exact age, measure the gap between two dates, find the week number, or watch a live countdown to any moment that matters.
Try the age calculator
LivePick a date to preview your exact age. Open the full tool for total weeks, hours and a live birthday countdown.
The full toolkit
Four focused calculators that cover the date math people search for most. Each one is single-purpose, instant and built for accuracy.
Age CalculatorFlagship
Your exact age in years, months and days, total days and weeks, and a live countdown to your next birthday.
Date Difference
Days, weeks, months and years between any two dates, with a business-days variant and an include-end-day toggle.
Countdown Timer
Count down to any date and time, then copy a clean, embeddable widget for your own site.
Week Number
Find the current ISO 8601 week number, the week for any date, and how many weeks are in the year.
Popular countdowns
Live counters to the events people track most. Every page recomputes its next date automatically, so it is always correct.
Date math without the guesswork
Dates look simple until you try to count them. Months run from 28 to 31 days, leap years slip an extra day into February, and week numbers follow a standard that most calendars hide. DaysTo takes care of all of it so you get an answer you can trust, whether you are working out how old someone is, how many working days are left in a project, or how long until the next holiday.
Every tool here follows the same principles. Calculations use whole calendar days measured from your device's local date, so today always means the date on your wall. Leap years are counted exactly, business days skip Saturday and Sunday, and week numbers follow the ISO 8601 standard used across most of the world. Nothing you type is uploaded or stored, because the math happens right in your browser.
Made to embed and share
The countdown tool produces a clean iframe snippet you can paste into any site, so a launch page, wedding site or event listing can carry a live counter that never drifts. Copy the code, drop it in, and the timer keeps ticking wherever it lands.
Common questions
How many days are in a year?
A common year has 365 days and a leap year has 366. On average a year is about 365.2425 days long, which is why the calendar adds a leap day roughly every four years to stay aligned with the seasons.
How do I count the number of days between two dates?
Count the whole midnights that separate the two calendar dates. The date difference calculator does this for you and also reports weeks, months, years and business days, with an option to include or exclude the end date.
Are the DaysTo calculators free and private?
Yes. Every tool is free and runs entirely in your browser using plain JavaScript. No birth dates, event dates or results are ever uploaded, stored on a server or tracked.
Do the countdowns update in real time?
Yes. Each countdown ticks down live to the second while the page is open, and the days-until pages recompute the next occurrence automatically every year.