A clear result in a few inputs.
- Enter the requested values.Use consistent units and the real values for your scenario.
- Read the main result and breakdown.NumLuma recalculates immediately when an input changes.
- Check the formula and assumptions.Use the supporting context before making a real-world decision.
What this calculator does
Billable-hours planning connects three variables: revenue target, billing rate and available working weeks. The result is the number of client-billable hours required, not the total number of hours you need to work.
What to know before you use the result
- Non-billable work such as sales, admin and learning is not included in the required billable hours.
- The billing rate should be the actual average collected rate, not only the advertised rate.
- Working weeks should exclude the time you realistically plan not to bill.
Common mistakes to avoid
- Treating billable hours as total working hours.
- Using 52 working weeks despite planned vacation or downtime.
- Ignoring discounts, unpaid invoices or utilization changes that reduce realized revenue.
Where this calculation is useful
FreelancersConsultantsAgenciesProfessional services
Related concepts
billable hoursutilizationbilling raterevenue target