Free tools for the questions everyone asks: How old am I? How many days until my vacation? What date is 90 days from now? No sign-up, no download — the math runs entirely in your browser.
Start a countdownHere's one of our tools in action, right now:
Counting down to
Your exact age in years, months, and days — plus days lived and your next birthday countdown.
How many days, weeks, and months separate any two dates.
What date is 30, 90, or 180 days from today? Do the math instantly.
Build a live countdown to anything — a wedding, a trip, the weekend — and share it with a link.
Live holiday countdowns — Christmas, Thanksgiving, Halloween, Easter and more, always counting to the next one.
Your 1,000th, 10,000th, and 30,000th day of life each happen exactly once. Find yours — and share it.
A live countdown to the next U.S. general election, with the exact date and how it's set.
Count down to the next spring forward or fall back — which way the clocks move, and when.
A live countdown to the April 15 federal filing deadline, plus extension and refund basics.
Date questions come up constantly: parents working out a child's exact age for school enrollment, travelers counting down to a flight, HR teams calculating notice periods, couples tracking anniversaries. Search engines answer the simplest versions, but the moment you need anything specific — "how old am I in days?", "what date is 120 days after March 3rd?" — a dedicated calculator is faster and less error-prone than doing it by hand or in a spreadsheet.
Everything runs in your own browser using JavaScript. No information you type ever leaves your device — there's nothing to sign up for and nothing stored on a server. That also means the tools work offline once the page has loaded, and results are instant.
Date math is done with real calendar rules, including leap years. For age calculations, "years" means full calendar years since your birthdate, not 365-day chunks. For legal or contractual questions (eligibility dates, notice periods), always double-check against the official rules of the organization involved — day-count conventions can differ by jurisdiction.
Start from the question you're asking. "How old am I, exactly?" is the Age Calculator — it breaks your age down to the day and totals up your days and weeks lived. "How many days are there between two dates?" is the Date Difference calculator, handy for counting down to a trip or measuring how long something has taken. "What date will it be in 90 days?" belongs to Add / Subtract Days. And if a date is special enough to watch it approach, the Countdown Timer turns it into a live clock you can share with a link, so everyone counts down to the same moment together.
Every tool here is free, with no accounts and no downloads, and every answer is worked out on the spot in your browser — the accuracy notes above describe the calendar rules doing the work, including leap years, shorter months, and birthdays that fall on the 29th, 30th, or 31st.