Convert hours and minutes (HH:MM) to decimal format for timesheets, payroll, and billing with batch conversion support.
The Hours to Decimal Calculator converts HH:MM time into decimal hours. That is the format most payroll, billing, and timesheet systems expect when they need hours as a plain number instead of clock time.
The conversion is simple in principle: divide the minutes by 60 and add them to the hours. The mistake people make most often is writing 7:45 as 7.45 instead of 7.75. This calculator handles that conversion directly and can also process batches of entries.
Use it when you need a decimal-hour value that can be copied straight into payroll, invoicing, or spreadsheet workflows.
Decimal hours are easier to add and total than HH:MM entries, which is why they are used in payroll and billing. This tool helps you avoid the common 60-versus-100 mistake and makes batch conversion faster than doing the arithmetic by hand.
Decimal Hours = Hours + (Minutes / 60). Example: 7:45 → 7 + (45/60) = 7 + 0.75 = 7.75. Reverse: Decimal 7.75 → 7 hours + (0.75 × 60) = 7h 45m.
Result: 7.75 decimal hours
7 hours and 45 minutes: 45 ÷ 60 = 0.75, so 7 + 0.75 = 7.75 decimal hours.
Payroll software, accounting systems, and billing platforms operate in decimal hours because they make arithmetic straightforward. Adding 7.75 + 8.25 + 7.50 = 23.50 hours is simple. Trying to add 7:45 + 8:15 + 7:30 in HH:MM format requires carrying over when minutes exceed 60. Decimal format eliminates this complexity.
The number one mistake in time-to-decimal conversion is treating minutes as a percentage of 100 instead of 60. People write 7:30 as 7.30 or 7:45 as 7.45. The correct conversions are 7.50 and 7.75 respectively. This error can cost businesses thousands in payroll miscalculations over time. Always divide minutes by 60, never by 100.
Different industries use different rounding increments. Legal billing typically uses 6-minute increments (0.1 hour). Corporate payroll often uses 15-minute increments (0.25 hour). Some companies use 1-minute precision. The billing increment affects how you round your decimal — always check your organization's policy before submitting time entries.
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Because minutes are base-60, not base-100. You divide minutes by 60 to get the decimal fraction: 30 ÷ 60 = 0.50, not 0.30.
Common rounding: nearest 0.25 (15 min), nearest 0.10 (6 min), or nearest 0.05 (3 min). Check your employer or client's policy.
15 ÷ 60 = 0.25, so 7:15 = 7.25 decimal hours.
Yes — use the batch converter section. Enter multiple HH:MM values separated by commas or line breaks.
Take the decimal part and multiply by 60. For 7.75: 0.75 × 60 = 45, so it's 7:45.
No — 0.1 hours = 6 minutes (0.1 × 60 = 6). This is the most common confusion in decimal time.