Date & Time Tools

Free online date & time tools calculators and converters. Browse all date & time tools tools on CalcSrc.

Calculate the number of days, weeks, months, and years between two dates. Find the exact duration between any two dates.

Calculate your exact age in years, months, and days from your date of birth. See your age in different units.

Add or subtract days, weeks, or months from any date. Find the resulting date instantly.

Calculate the number of business days (weekdays) between two dates. Excludes weekends from the count.

Convert Unix timestamps to human-readable dates and dates to Unix timestamps. Supports seconds and milliseconds.

Convert times between timezones. See the current time in major cities and time zones worldwide.

Convert 12-hour time (AM/PM) to 24-hour (military) time format. Quick and easy time format conversion.

Convert 24-hour (military) time to 12-hour AM/PM format. Simple military time conversion.

Check if a year is a leap year. Learn the rules for leap years in the Gregorian calendar.

Find out what day of the week any date falls on. Works for past and future dates.

Find the ISO week number for any date. See which week of the year a specific date falls in.