Time Calculator
Add / subtract / multiply / divide time, or find duration between dates and date-times.
Switch the operation to change the input layout.
Mixed “mo / y” modes use standard approximations; calendar modes below are exact.
Enter up to 20 values. A new row appears once you type in the last row.
For subtract, we compute: first row − (sum of the others).
Multiply: time × factor ·· Divide: time ÷ factor.
Calculated precisely using your device’s locale support.
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Total seconds
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Total minutes
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Total hours
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Total days
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≈ months (30.5 d)
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≈ years (365 d)
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