Billable Hours Calculator
Track billable tasks and estimate client invoice totals.
Billable tasks
Track client work and invoice amounts
Add tasks and click Calculate.
Examples
Freelance design day
2h client call @ $75/hr
5h 30m design @ $75/hr
7.5 hrs — $562.50
Single rate for all tasks
Mixed rates
1h strategy @ $120/hr override
4h implementation @ $75/hr default
5 hrs — $420.00
$120 + $300 = $420 total
Consulting half-day
3h 45m workshop prep
Default rate: $95/hr
3.75 hrs — $356.25
3.75 × $95 = $356.25
What is a Billable Hours Calculator?
A billable hours calculator helps freelancers and consultants track client work and estimate invoice totals. Add tasks with hours, minutes, and optional rate overrides, then see total billable time and amount at a glance.
Set a default hourly rate for most work, then override specific tasks when a client pays a premium — such as strategy sessions versus implementation. Save entries locally to reuse common billing patterns.
Combine with our work hours calculator for shift tracking, or the timesheet calculator for weekly hour totals.
Related guides
Frequently Asked Questions
Questions about tracking billable client hours.
Billable hours are time spent on client work that you charge for. Non-billable time — admin, marketing, or internal tasks — is typically excluded from client invoices.
Yes. Enter a default hourly rate, then optionally override the rate for individual tasks when a project pays a different amount.
Each task's hours and minutes are converted to decimal hours, multiplied by its rate (override or default), and summed for the invoice total.
Yes. Click Save after calculating to store the entry in your browser history. Use History to reload previous sessions.
Yes. All calculations and saved history stay in your browser — nothing is sent to a server.