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Billable hours calculator
Turn time entries into billable hours and an invoice total. Deduct breaks, choose a rounding rule and download your line items, or switch modes to plan an annual billable target.
- Exact minutes or explicit rounding
- Inputs stay in your browser
Enter your time
Use non-overlapping entries of up to 24 hours each. Breaks are deducted before rounding.
Choose the method agreed with your client. Nearest rounds a halfway value up. Each entry is rounded separately; grouping entries can change the total.
Billable hours and amount
Total before tax or expenses
$134
1.12 billable hours (67 minutes)
Actual time: 67 minutes. Rounding changes the bill by 0 minutes and $0.
- Project work$134
67 actual minutes → 67 billed minutes × $120/hour
Amounts use billed minutes ÷ 60 × rate, rounded to cents per line. Displayed decimal hours are rounded to two places; the calculation uses the minutes.
Transparent math
How to calculate billable hours
Actual minutes = end time − start time − break minutes. An entry marked as ending the next day adds 24 hours before subtracting the start. Sessions must be no longer than 24 hours; time zones and daylight-saving changes are not applied.
Line amount = billed minutes ÷ 60 × hourly rate. Each line is rounded to cents, then added to the total. A decimal hour is a fraction of 60 minutes: 1 hour 30 minutes is 1.5 hours, not 1.30.
Worked example: 67 minutes at $120 per hour
Working from 9:00 to 10:17 with a 10-minute break leaves 67 minutes. Exact billing gives $134. Rounding up to 6-minute increments bills 72 minutes, or $144. Nearest 6-minute rounding bills 66 minutes, or $132.
Why rounding each entry matters
Two separate 3-minute entries rounded up to 6 minutes each become 12 billed minutes. Combining them before rounding gives 6 minutes. This calculator rounds each entry separately and shows the difference from exact time. Use the method in your client agreement.
How many billable hours do I need each day?
Daily target = billable hour goal ÷ (scheduled workdays − workdays off). For example, 1,900 hours across 230 available days requires 8.26 billable hours per day. On an 8-hour workday that exceeds 100% of available time, even before non-billable work.
What you can calculate
- Up to 30 entries with individual hourly rates
- Break deductions and explicitly marked overnight sessions
- Exact minutes, or rounding up, down or to the nearest increment
- Actual versus billed time and a CSV of every line
- A daily target based on your goal and available workdays
Use the right scope
Keep time and billing terms clear
All amounts are in USD. Enter non-overlapping work sessions and the rates you agreed with your client. The total covers time only; add expenses, taxes, discounts and other invoice adjustments separately. Export before leaving the page to keep your entries.
Follow the money
Check fees and costs after billing
Use your invoice amount to estimate payment fees, or compare your revenue with the costs you need to cover.