Free Invoice Generator

Billable hours calculator

Work out how many hours a year you can sell once days off and the work you can't charge for are taken out, and what those hours come to at your rate.

The shape of your week

All the hours you work in a day, billable or not.

The days you intend to work, before any time off.

The days you will not work

The days you plan to take, paid or not.

Public holidays, illness and any other days that go to something other than work. Count them honestly, as this is the figure that's easiest to underestimate.

What you can charge for

Round numbers to save typing, not a target. Quotes, admin, chasing payment and the work you redo for nothing all live in the other share.

Only used to turn the hours into money. Leave it blank if you want the hours alone.

GuideBillable hours in a yearHow this works, and where the figures go wrong →

What the billable hours calculator does not do

  • It doesn't know your billable share. The presets are round numbers, not benchmarks. I recommend counting the billable hours in a fortnight of your own calendar and using that share instead.
  • It doesn't forecast how much work will come in. It shows what the year could hold if it were full, so treat the figure as a ceiling rather than a prediction.
  • The revenue figure is what you would invoice, not what you would keep. Tax, business costs and everything else come out of it afterwards.
  • It does not keep anything. Nothing is written to your browser's storage while you use it and nothing is sent to us, so the figures are gone when you close the tab.

Related

To invoice hours you've already worked, use the hourly invoice calculator. For the rate itself, the freelance rate calculator works backwards from what the year has to cover. Paid a fixed fee each month instead? The retainer calculator works out the hourly rate that fee comes to.

Last updated 21 September 2026