Calculate differences, countdowns, day of the week, and more — instantly.
DateCalc is a free online tool that helps you work with dates quickly and accurately — no spreadsheets, no manual counting.
Enter a start date and an end date to instantly find out how many days, weeks, months or years lie between them. Useful for calculating age, contract durations, deadlines, subscription lengths, and more. DateCalc handles leap years and month-length differences automatically.
Need to know what date falls 90 days from today? Or what day it was 6 weeks ago? Use the date offset calculator to add or subtract any number of days, weeks, months or years from any starting date. Perfect for planning ahead or checking past deadlines.
Whether you are counting down to a holiday, a wedding, a product launch or a sports event, the countdown tool shows you exactly how many days remain. You can also count the days since a past date. Useful for tracking how long ago something happened.
Manual date counting is surprisingly error-prone. A single missed leap year or a wrong month length can throw off a calculation by days. DateCalc uses precise date arithmetic so you can trust the result whether you are calculating a legal notice period, a loan term, or simply planning a trip.
DateCalc works entirely in your browser: No account, no sign-up and no data sent to any server. All calculations happen locally on your device in real time. The tool is available in five languages (English, Italian, French, Spanish and German) and works on any device, from desktop to mobile.