Time to Decimal Calculator
Convert hours & minutes to decimal — instant payroll calculation
How to Convert Time to Decimal
Enter the hours and minutes in the fields on the left. The decimal result appears instantly — ready to enter into payroll systems, invoices, or spreadsheets.
Example: Worked 9:00 AM to 4:45 PM = 7 hours 45 minutes → 7 + (45 ÷ 60) = 7.75 hours. At $30/hr = $232.50.
Common Conversions
| Time | Decimal | Time | Decimal |
|---|---|---|---|
| 0h 15m | 0.25 | 0h 30m | 0.50 |
| 1h 15m | 1.25 | 1h 30m | 1.50 |
| 2h 15m | 2.25 | 2h 30m | 2.50 |
| 3h 15m | 3.25 | 3h 30m | 3.50 |
| 4h 15m | 4.25 | 4h 30m | 4.50 |
| 5h 15m | 5.25 | 5h 30m | 5.50 |
| 6h 15m | 6.25 | 6h 30m | 6.50 |
| 7h 15m | 7.25 | 7h 30m | 7.50 |
Minutes to Decimal Reference
| Minutes | Decimal | Minutes | Decimal | Minutes | Decimal |
|---|
Formula Examples
- 7 hrs 30 min → 7 + (30 ÷ 60) = 7 + 0.5 = 7.5 hours
- 8 hrs 15 min → 8 + (15 ÷ 60) = 8 + 0.25 = 8.25 hours
- 0 hrs 45 min → 0 + (45 ÷ 60) = 0.75 hours
- 10 hrs 20 min → 10 + (20 ÷ 60) = 10.333 hours
Why Use Decimal Time?
- Payroll systems require decimal hours for accurate salary calculations.
- Freelancers and consultants invoice clients by decimal hours.
- Project management tools like Jira and Asana use decimal time tracking.
- Spreadsheet math is easier — multiply decimal hours by rate directly.
- Time tracking apps export in decimal format for reporting.
Common Time to Decimal Conversion Mistakes
- Treating minutes as decimal hours directly — 30 minutes is NOT 0.30 hours. It is 0.50 hours (30 ÷ 60). This is the single most common payroll error.
- Using wrong reference: 7:15 ≠ 7.15 — 15 minutes = 0.25 decimal hours. So 7:15 = 7.25, NOT 7.15.
- Not separating break time — if you track 8:00–17:00 but take a 30-minute unpaid lunch, your billable time is 8.5 hours, not 9 hours.
- Rounding errors on timesheets — rounding each entry separately accumulates errors. Always calculate each time block precisely and sum them.
Why Time to Decimal Conversion Matters
- Payroll accuracy — HR and payroll systems calculate wages on decimal hours. One minute difference per day compounds to hours per year.
- Freelancer invoicing — billing clients requires precise time tracking. 2:45 billed at $100/hr = $275 — not $245.
- Timesheet submissions — many companies require time in decimal format (e.g., 7.5 hours, not 7:30) for their attendance systems.
- Overtime calculations — overtime kicks in at exactly 40 hours per week. Precise decimal tracking ensures compliance.
Frequently Asked Questions
What is 7 hours 45 minutes in decimal?
7 hours 45 minutes = 7.75 decimal hours. Calculation: 7 + (45 ÷ 60) = 7 + 0.75 = 7.75.
What is 8 hours 30 minutes in decimal?
8 hours 30 minutes = 8.5 decimal hours. Calculation: 8 + (30 ÷ 60) = 8.5.
What is 1 hour 20 minutes in decimal?
1 hour 20 minutes = 1.333 decimal hours. Calculation: 1 + (20 ÷ 60) = 1.3333.
How do I use decimal time for payroll?
Multiply decimal hours by your hourly rate. Example: 7.5 hours × $20/hr = $150.00. Use the payroll calculator on the left for automatic calculation.
What is 7:30 in decimal hours?
7:30 (7 hours 30 minutes) in decimal is 7.5 hours. Calculation: 7 + (30 ÷ 60) = 7 + 0.5 = 7.5. This is the most common work shift — 7.5 hours at $20/hr = $150.
What is 8:45 in decimal hours?
8:45 (8 hours 45 minutes) in decimal is 8.75 hours. Calculation: 8 + (45 ÷ 60) = 8 + 0.75 = 8.75.
What is 6:15 in decimal hours?
6:15 (6 hours 15 minutes) in decimal is 6.25 hours. Calculation: 6 + (15 ÷ 60) = 6 + 0.25 = 6.25.
What is 30 minutes in decimal hours?
30 minutes in decimal hours is 0.5 hours. Calculation: 30 ÷ 60 = 0.5. Similarly: 15 min = 0.25, 45 min = 0.75, 20 min = 0.333.
What is 15 minutes in decimal hours?
15 minutes in decimal hours is 0.25 hours (one quarter of an hour). Calculation: 15 ÷ 60 = 0.25. So 8 hours 15 minutes = 8.25 decimal hours.