4:17
Type a duration
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Time arithmetic, simplified
Calculate time.
Keep the minutes.
Add, subtract, multiply, and divide durations directly in HH:mm. No manual conversions. No forgotten remainders.
- HH:mmNative input
- 4Core operations
- 0Accounts required
Morning shift
4:17
Break
0:15
Total
4:02
4.03 decimal hours
A calculator that understands duration
Enter time the way you already read it.
Keep hours and minutes visible from the first entry to the final result.
Choose an operation
Work with durations using the same four operations as a standard calculator.
8:04= 8.07 h
Read both results
See the HH:mm total and its decimal-hour equivalent without converting anything yourself.
Everything in view
A calculation you can follow.
The running history, current input, HH:mm total, and decimal result stay together, so every step is easy to check.
Visible history
Review the complete sequence instead of trusting a single final number.
Quick minute keys
Enter common quarter-hour values with one tap.
Your preferred appearance
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Made for everyday totals
Less conversion. More clarity.
Ready when time matters