Freelance Availability Calculator
Estimate how many billable hours, project slots, and working days you have available based on your schedule, time off, and admin workload.
Overview
The Freelance Availability Calculator helps you estimate how much paid client work you can realistically take on. Enter your working days, hours, weeks per year, non-billable time, and average project size to get a clearer view of your freelance capacity.
How it works
The calculator first estimates your total scheduled working time by multiplying your working days per week by your working weeks per year and hours per day. It then removes the percentage of time spent on non-billable tasks such as admin, marketing, and client communication. The remaining hours are treated as billable capacity. That yearly total is then converted into a monthly average, and divided by your average project hours to estimate how many similar projects you may be able to take on each month.
How to use this calculator
- 1Enter how many days you usually work each week.
- 2Add the average number of hours you work per day.
- 3Enter how many weeks you expect to work in a year.
- 4Estimate the percentage of time spent on non-billable work.
- 5Enter the typical number of billable hours for one project.
- 6Review your estimated billable hours and monthly project capacity.
Example Calculation
Working days per week
5
Working hours per day
7
Working weeks per year
46
Non-billable time
30%
Average hours per project
20
Annual billable hours
1,127 hours
With a 5-day week, 7 working hours per day, 46 working weeks per year, and 30% non-billable time, the estimate is 1127 billable hours per year, about 93.9 hours per month, and roughly 4.7 average projects per month.
Frequently asked questions
What does this calculator estimate?
It estimates how many billable hours and average-sized projects you may realistically be able to take on based on your work schedule and unpaid workload.
What counts as non-billable time?
Non-billable time can include admin, invoicing, proposals, sales calls, marketing, internal meetings, bookkeeping, and other work you do without charging a client.
Why is my project capacity lower than expected?
Many freelancers underestimate how much time is spent on unpaid tasks, revisions, client communication, and context switching. A higher non-billable percentage reduces available client hours.
Should I use working weeks per year or vacation days?
This version uses working weeks per year, so you can subtract holidays, planned breaks, and other time off before entering your number.
Can I use this calculator for retainer work?
Yes. If you work on retainers, enter a realistic average project or client workload in hours to estimate how many similar commitments fit into your month.
How accurate is the result?
It is a practical estimate for planning, not a guaranteed workload limit. Your real capacity may change based on client mix, project complexity, and interruptions.
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Assumptions and warnings
Assumptions
- Your workload is spread fairly evenly across the year.
- The non-billable percentage stays broadly consistent over time.
- Average project hours are reasonably similar from one project to another.
- The calculator estimates capacity and does not account for unexpected delays or urgent client work.
Warnings
- This calculator provides an estimate only and should be used as a planning tool.
- Actual availability may vary due to revisions, scope changes, client communication, and unpaid tasks.