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Hours to Decimal Calculator
Convert between time format (hours:minutes:seconds) and decimal time with precision
Time to Decimal Conversion
Clock Time Input (hh:mm:ss)
Input Time: 01:30:00
Decimal Time Results
1.5000
Decimal Hours
90.00
Decimal Minutes
5400
Decimal Seconds
Example Conversions
1 hour 30 minutes to decimal
Input: 01:30:00
Calculation: 1 + (30/60) + (0/3600) = 1 + 0.5 + 0 = 1.5
Result: 1.5000 decimal hours
8.75 decimal hours to time
Input: 8.75 decimal hours
Calculation: 8 hours + (0.75 × 60) minutes = 8 hours 45 minutes
Result: 08:45:00
7 hours 15 minutes 30 seconds to decimal
Input: 07:15:30
Calculation: 7 + (15/60) + (30/3600) = 7 + 0.25 + 0.0083 = 7.2583
Result: 7.2583 decimal hours
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Quick Presets
Quick Reference
15 minutes0.25 hours
30 minutes0.50 hours
45 minutes0.75 hours
1 hour1.00 hours
1h 30m1.50 hours
2h 15m2.25 hours
Formula: Decimal Hours = Hours + (Minutes ÷ 60) + (Seconds ÷ 3600)
How to Convert Hours to Decimal and Vice Versa
Converting Hours to Decimal
Formula: Decimal Hours = h + (m/60) + (s/3600)
Where:
- • h = number of hours
- • m = number of minutes
- • s = number of seconds
Example: 2 hours 30 minutes 45 seconds
= 2 + (30/60) + (45/3600)
= 2 + 0.5 + 0.0125
= 2.5125 decimal hours
Common Time Fractions
6 minutes0.10 hours
12 minutes0.20 hours
18 minutes0.30 hours
24 minutes0.40 hours
36 minutes0.60 hours
Converting Decimal to Hours
- 1.The whole number part represents hours
- 2.Multiply the decimal part by 60 to get minutes
- 3.If there's still a decimal in minutes, multiply by 60 to get seconds
Example: 3.75 decimal hours
Hours: 3 (whole number)
Minutes: 0.75 × 60 = 45
Result: 3 hours 45 minutes
Use Cases
- •Payroll and timesheet calculations
- •Project time tracking and billing
- •Converting between time systems
- •Academic and scientific calculations
- •Manufacturing and production scheduling
Important Notes
Accuracy Considerations
- • Use appropriate decimal places for precision
- • Round carefully for payroll applications
- • Consider company rounding policies
- • Verify calculations for financial accuracy
Best Practices
- • Double-check conversions for critical applications
- • Use consistent rounding throughout calculations
- • Keep original time format as backup
- • Understand your specific industry standards
Related Time Calculators
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