Time Tracking Calculator
Add up tracked hours and turn them into billable time and earnings.
Last updated · View algorithm, constants and default inputs (JSON)
About this calculator
Estimate billable and non-billable hours from your weekly total and billable share. Earnings use the hourly rate you enter; projected earnings assume the same week repeats for each selected week. The unrecorded-hours value is hypothetical, not necessarily collectible or legally billable.
Worked example
calculated with the default values below
Hours tracked this week 38 h · Billable share 70 % · Hourly rate 80 $/h · Hours worked but not recorded 2 h · Weeks to project 4 weeks Billable hours 26.60 h · Non-billable hours 11.40 h · Earnings this week 2,128.00 $ · Projected earnings 8,512 $ · Hypothetical value of unrecorded hours 160.00 $
General background references
Disclaimer
These calculators give general date results. Public holidays, working-day conventions and time-zone rules are set locally and change, so confirm against the official calendar for anything legally or contractually binding.
Implementation source
This record describes the implementation used by this page. It is not independent validation. External references, when available, support only the stated formula or definition; estimates and custom rules retain their own assumptions.
Formula and variables
E = H × p ÷ 100 × R; P = E × w; L = 25 × (r ÷ 2) ÷ 60 × R + U × R
- H
- Total hours
- p
- Billable share (%)
- R
- Hourly rate
- w
- Weeks
- r
- Rounding increment (min)
- U
- Unbilled hours
Billable hours = weekly hours × billable share; non-billable hours are the remainder. Earnings = billable hours × entered hourly rate. Projected earnings repeat that weekly estimate; the unrecorded-hours value = entered unrecorded hours × rate and is hypothetical, not verified billable loss.
Frequently asked questions
How is the value of unrecorded time calculated?
It multiplies the unrecorded hours you enter by your hourly rate. This is hypothetical and does not determine whether the time was billable, approved or recoverable. Projected earnings assume the same weekly hours and billable share continue.