Time to Decimal Calculator
Enter a standard time such as 02:30 to get decimal hours (2.5). Or convert decimal hours back to HH:MM for timesheets and payroll.
HH:MM → Decimal
Decimal hours: 7.5
Rounded (2 decimals): 7.5
Rounded (4 decimals): 7.5
Total minutes: 450
Decimal → HH:MM
HH:MM: 07:30
Total minutes: 450
Total seconds: 27,000
How to Use This Calculator
Convert HH:MM to decimal
Enter a time like 01:45 to get decimal hours (1.75). Perfect for payroll and invoicing.
Convert decimal hours to HH:MM
Enter a decimal like 2.25 to get 02:15. Helps when a system exports decimal hours.
Use the totals
Copy minutes/seconds for further calculations or to reconcile different timekeeping formats.
Formula
Decimal Hours = Hours + (Minutes ÷ 60)
HH:MM = floor(Decimal Hours) : round((Decimal Hours − Hours) × 60)
Example: 02:45 → 2 + 45 ÷ 60 = 2.75. Decimal 5.6 → 05:36 (rounded to nearest minute).
Where This Helps
- Convert timesheets between HH:MM and decimal hours.
- Translate workout or focus session logs into decimals for analytics.
- Ensure payroll systems and manual logs stay synchronized.
- Convert phone call durations or service appointments for billing.
Frequently Asked Questions
Can I enter negative times?
Yes—prefix with a minus sign (e.g., -01:30 or -1.5). The calculator will show negative decimals and HH:MM.
What about seconds?
HH:MM input ignores seconds. For finer resolution, convert seconds to decimal minutes before entering.
Why does rounding matter?
Payroll often rounds to hundredths. The calculator displays both raw and rounded decimals for clarity.
Can I copy the results into Excel?
Absolutely—values are plain text, ready to paste into spreadsheets or accounting software.