This is a free, user-friendly countdown timer. Simply set the hours, minutes, and seconds, then start the timer online.

Easy to use with no setup required—just click 'Start' to begin a 10-minute countdown timer. Perfect for classrooms and meetings, try the fullscreen button for better visibility.

Convert hours and minutes to decimal time with our fast and accurate timesheet calculator.

Quickly calculate how much time has passed between any two times or dates—down to the second—with our easy-to-use free calculator.

Free online time card calculator for weekly work hour tracking. Includes overtime calculations based on customizable hourly rates.

Easily calculate future or past dates by adding or subtracting time (days, hours, minutes, seconds) from a given start date.

Easily calculate the time between two times or dates using our free duration calculator—perfect for finding the difference in hours, minutes, and seconds.

Use our hours calculator to add up multiple time entries and get your total hours worked in a simple hour and minute format.

Convert epoch and Unix timestamps easily. Includes date/time function syntax for multiple programming languages.

Calculate total work hours for your timesheet using our free online payroll calculator. Supports the standard 12-hour work clock format.

What’s the difference between CST and EST? CST is one hour behind EST, meaning when it’s 12 PM EST, it’s 11 AM CST.

Date Calculator: Easily add or subtract days, weeks, months, or years from any date to find deadlines, schedules, and more.

Free online day counter to calculate days between two dates. Get a breakdown of workdays, weekends, and holidays instantly.

Use this weekday calculator to find the day of the week for any date. Includes fun facts and a printable monthly calendar.

Free online debt calculator to find the fastest and smartest way to pay off multiple debts, including credit cards, auto loans, and mortgages.

Use this free calculator to find your front-end and back-end DTI ratios—and get an estimate of how much house you can afford.

Free pregnancy due date calculator. Estimate your baby’s due date using your period, conception date, ultrasound, or IVF transfer.

Free child height predictor using linear regression. Also includes height unit conversion between inches, cm, and feet.

Free time difference calculator to find the number of hours and minutes between two daily time points.

Easily calculate the time difference in hours and minutes between any two times. For full-day or weekly work hours, use our Time Card Calculator.