Time Duration Calculator
Convert a duration in hours, minutes, and seconds into total seconds, decimal hours, and minutes. Useful for billing and time tracking.
Total Seconds
—
Total Minutes —
Decimal Hours —
Normalized —
How to Use This Calculator
- Enter the hours, minutes, and seconds of the duration.
- Results instantly show total seconds, total minutes, and decimal hours.
- All fields accept values beyond the normal range (e.g., 90 minutes).
Formula
Total seconds = h × 3600 + m × 60 + s
Decimal hours = Total seconds ÷ 3600
Total minutes = Total seconds ÷ 60
Example
Example: 1h 45min 30sec → Total seconds: 6330, Total minutes: 105.5, Decimal hours: 1.758.
Frequently Asked Questions
- Divide the minutes by 60 and add to the hours. For example, 2 hours 30 minutes = 2 + 30/60 = 2.5 decimal hours.
- Total seconds = (hours × 3600) + (minutes × 60) + seconds.
- Yes — entering 90 minutes is treated as 1 hour 30 minutes; the calculator normalizes the input automatically.
- Take the integer part as hours, multiply the decimal part by 60 for minutes. E.g., 3.25 = 3h 15min.
- Yes — the decimal hours output can be multiplied directly by an hourly rate to get billable amounts.