Billable hours calculator

Add your time entries and hourly rate to see what to bill, including the effect of rounding each entry. You can also break an annual billable-hours target into daily and weekly hours.

You'd bill

$570.00

1.90 billable hours (1 hr 54 min)

Exact value: $525.00; 1 hr 45 min worked
Rounding adds: +$45.00; +9 min of time

Each entry rounds up to the next increment; exact multiples stay as they are. Seconds are ignored.

Compare 6-, 10- and 15-minute billing increments

See how each increment changes the charge for the same entries. Each entry rounds up separately; “vs exact” shows the extra amount.

Increment	Billed time	Billed amount	vs exact
Exact time	1.75 hr	$525.00	—
6 min (0.1 hr)	1.90 hr	$570.00	+$45.00
10 min (⅙ hr)	2.00 hr	$600.00	+$75.00
15 min (¼ hr)	2.25 hr	$675.00	+$150.00

Rounded once on the total instead of per entry, the same work would bill 1.80 hr ($540.00).

Why rounding each entry changes the total

Two 7-minute entries round up to 12 minutes each at six-minute increments: 24 minutes billed. Rounding their combined 14 minutes gives 18 minutes. When comparing systems, check whether they round each entry or the total.

For rounding to the nearest increment, use the billing increment chart. See billing increments explained for policy examples.

What the amount includes

One hourly rate for all entries. Calculate different rates separately.
Time charges before tax, discounts and other invoice adjustments.
Your selected currency, with no exchange-rate conversion.

Charges use minutes, not the displayed decimal hours. For example, 10 minutes at $300 an hour costs $50; using the rounded 0.17 hours gives $51. The decimal hours converter has a chart and spreadsheet formulas.

Annual billable hours: daily and weekly targets

Enter your annual target, working weeks and days per week. Exclude leave and public holidays from your working weeks.

Annual billable-hours targets at a five-day working week.
Annual target	Per week (46 weeks)	Per day (230 days)	Per day (240 days)
1,500 hours	32.6	6.5	6.3
1,600 hours	34.8	7.0	6.7
1,800 hours	39.1	7.8	7.5
1,900 hours	41.3	8.3	7.9
2,000 hours	43.5	8.7	8.3
2,200 hours	47.8	9.6	9.2
3,000 hours	65.2	13.0	12.5

How many hours a day is 1,800 billable hours?

At five days a week, 1,800 billable hours means 7.8 hours a day over 46 weeks, or 7.5 over 48 weeks. Admin and other non-billable work add to the working day.

Table values are rounded to one decimal place. To compare billable hours with total working hours, see billable utilisation.

More timesheet and billing tools

Guides to billable hours

Billing Increments Explained: 6, 10 and 15 Minutes

Billable Hour Targets for Small Law Firms: Setting Realistic Goals Without Burnout

Billable vs Non-Billable Hours: A Complete Guide for Professional Services