Pro-rata Salary Calculator
Estimate an annualized salary proportion from contracted weekly hours and full-time weekly hours.
This arithmetic estimate assumes salary is proportional to weekly hours. It does not determine jurisdictional pay entitlements, benefits, deductions, or tax. Use the same annual salary basis and positive weekly-hour values.
Manual inputs stay in this browser. No external data is fetched.
Sources: GOV.UK, part-time workers and pay information
Result
A QUICK WALKTHROUGH
How to use this tool
- This arithmetic estimate assumes salary is proportional to weekly hours. It does not determine jurisdictional pay entitlements, benefits, deductions, or tax. Use the same annual salary basis and positive weekly-hour values.
- Pro-rata annual salary = full-time annual salary × contracted weekly hours ÷ full-time weekly hours.
- Manual inputs stay in this browser. No external data is fetched.
Formula
Pro-rata annual salary = full-time annual salary × contracted weekly hours ÷ full-time weekly hours.
Assumptions and limits
This arithmetic estimate assumes salary is proportional to weekly hours. It does not determine jurisdictional pay entitlements, benefits, deductions, or tax. Use the same annual salary basis and positive weekly-hour values.
Sources
GOV.UK, part-time workers and pay information
GOOD TO KNOW
Common questions
Does this calculate take-home pay?
No. It estimates a proportional annual salary from weekly hours; it does not calculate tax, benefits, deductions, or legal entitlements.
What should I enter for full-time hours?
Enter the normal weekly hours for the full-time role and use a matching annual salary basis.