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Billable Hours Calculator
Enter each task’s time in minutes or h:mm and get billable hours in 6-minute units (0.1 h) — the standard for law firms — or quarter-hours, with the amount at your hourly rate. Copy the entries straight into your time sheet. Nothing leaves your browser.
Billable hours calculator
TaskTimeHours
Enter minutes (47), h:mm (2:10) or “1h 30m”.
Billable time$1,190.00
| 1–6 min | 0.1 |
| 7–12 min | 0.2 |
| 13–18 min | 0.3 |
| 19–24 min | 0.4 |
| 25–30 min | 0.5 |
| 31–36 min | 0.6 |
| 37–42 min | 0.7 |
| 43–48 min | 0.8 |
| 49–54 min | 0.9 |
| 55–60 min | 1.0 |
General information and templates, not legal advice. Laws differ by jurisdiction and change; have a qualified lawyer review anything you rely on. Disclaimer
How 6-minute billing works
An hour is split into ten 6-minute units, each worth 0.1 hours. Most firms round up to the next unit, so any work from 1 to 6 minutes bills as 0.1 h, 7–12 minutes as 0.2 h, and a 15-minute call as 0.3 h. Your engagement letter decides the rule — switch to nearest or down if it says so.
Avoid common billing errors
- Record time as you go rather than reconstructing it at month-end.
- Do not round every short task to a full unit if your agreement uses nearest-unit rounding.
- Describe tasks specifically; vague entries (“review file”) are the most disputed.
Minutes to billable hours (round up, 0.1 h)
| Time | Billed |
|---|---|
| 1 min | 0.1 h |
| 5 min | 0.1 h |
| 6 min | 0.1 h |
| 7 min | 0.2 h |
| 12 min | 0.2 h |
| 15 min | 0.3 h |
| 18 min | 0.3 h |
| 20 min | 0.4 h |
| 30 min | 0.5 h |
| 45 min | 0.8 h |
| 50 min | 0.9 h |
| 60 min | 1.0 h |
Frequently asked questions
How do you convert 15 minutes to billable hours?
15 minutes is 2.5 six-minute units; rounded up that is 3 units, so 0.3 hours.
What is 0.1 of an hour?
6 minutes.
Should I round up or to the nearest increment?
Follow your engagement letter and local rules. Rounding up is the most common convention; some clients and courts require nearest-unit rounding.
Can I bill in quarter hours instead?
Yes — choose the 15-minute increment and each unit is 0.25 hours.