Duration Calculator – Add Hours
Easily add hours online
With our duration calculator, simply add multiple hours and minutes together to get an accurate total. Just enter your various durations one after another, and the result is displayed instantly on screen. You can add as many rows as needed, depending on how many durations you want to add up.
It's a very handy tool when you have several time slots to combine and mental arithmetic quickly becomes complicated. The duration calculator is often used at work, especially by employees or freelancers who need to total their working hours for the week or the month.
Why add hours online?
There are many reasons why you might need to use an online duration calculator. For example, you may want to add hours of work to check your weekly total, or add up the durations of several activities to find out the total time spent on a project.
Time calculators also let you count overtime, accumulate sports training durations, or add up travel times from multiple trips.
How does the duration calculator work?
The duration calculator runs directly in your browser. It handles hours and minutes, and automatically converts when the minutes exceed 60. For example, if you add 2 h 45 and 1 h 30, it will display 4 h 15 rather than 3 h 75. No plugins or installation are needed, and you can add or remove calculation rows at any time.
You can use this tool to get the exact result when you need to fill in your timesheets or provide a total number of hours to your employer. It lets you redo the calculation at any time by changing or removing a duration.
A reliable tool for calculating your hours
The great advantage of our duration calculator is its simplicity. In just a few clicks, add up all your durations with no risk of calculation errors.
Unlike a manual calculation on paper, which can quickly lead to mistakes with minute-to-hour conversions, our tool handles everything automatically. What's more, it's completely free and accessible on all platforms: mobile, tablet, or desktop. This makes it much easier to accumulate hours, whether it's time spent at work, tracking a project, or any other situation requiring you to add up durations.
You can also request the result in decimal format, which is often required for invoices or payslips. Perfect for totalling your work hours or getting a precise duration total in just a few clicks.