Free online date and time calculators for all your needs. Calculate age, find the number of days between dates, add or subtract days from a date, create countdowns, and more. Fast, accurate, and 100% private.
How do I calculate the number of days between two dates?
Use our Date Difference Calculator. Simply enter the start and end dates, and it will instantly show you the total days, weeks, months, and years between them. You can also choose whether to include the end date in the count.
How is my exact age calculated?
Our Age Calculator computes your exact age from your birth date to today (or any specified date). It shows years, months, days, and total days, taking leap years and different month lengths into account.
How many days are left until a future date?
Set the start date as today and the end date as your target date in the Date Difference Calculator to see the exact number of days, weeks, and months remaining.
Are these date calculators accurate?
Yes, our date and time calculators follow standard calendar rules — leap years, varying month lengths, and inclusive/exclusive end dates — and are tested against known date ranges.
Do I need to sign up to use these calculators?
No, all calculators on CalcBit are completely free and require no signup or registration. All calculations happen in your browser.