Converting Hourly Rates to Annual Salary
The straightforward path from hourly wage to yearly income requires just three steps. First, multiply your hourly rate by the number of hours you work each week. For a typical full-time role, that's 40 hours, but part-time or overtime positions will differ. Second, account for the working weeks in a year: most employment calendars contain 52 weeks (excluding public holidays and vacation, though those complicate real-world calculations). Multiply your weekly total by this figure.
The result is your gross annual salary before taxes or deductions. For example, a worker earning £18 per hour at 40 hours weekly earns £37,440 per year. If hours fluctuate—say, 35 hours one week and 45 the next—use your average weekly hours for a realistic projection.
Working Backward: Annual Salary to Hourly Rate
The reverse calculation is equally useful when you receive a job offer with only an annual figure. Take your stated annual salary and divide it by 52 weeks, which gives you the weekly amount. Then divide that weekly pay by the number of hours you work per week to arrive at the hourly rate.
This matters because an offer of £30,000 per year sounds different when you realise it's roughly £14.42 per hour at 40 hours weekly. Knowing the hourly equivalent helps you compare positions that advertise pay differently—one role might quote hourly, another salary. A quick reversal ensures you're making apples-to-apples comparisons across job postings.
The Mathematics Behind Salary Conversions
Four core equations connect hourly rates to all common pay intervals:
Weekly pay = Hourly rate × Hours per week
Daily pay = Hourly rate × Hours per week ÷ Days per week
Annual salary = Hourly rate × Hours per week × 52
Monthly pay = Hourly rate × Hours per week × 52 ÷ 12
Hourly rate— Your wage per hour of workHours per week— Total hours worked each week (commonly 40 for full-time)Days per week— Number of working days per week (typically 5)Annual salary— Gross yearly income before tax
Practical Considerations When Converting Pay Periods
Several real-world factors can shift your actual earnings from the raw calculation.
- Account for unpaid time off — The standard 52-week formula assumes you work every single week. In reality, vacation days, sick leave, and public holidays reduce paid working weeks. A more conservative estimate uses 48–50 weeks, which lowers your annual figure by 4–8% and gives a truer picture of take-home potential.
- Variable hours and overtime premiums — If your schedule isn't fixed, calculate using your average weekly hours rather than a single week's total. Additionally, overtime often pays at 1.5× or 2× the base rate. Include it separately if it's a regular part of your compensation, as ignoring it understates your earnings.
- Salary vs. hourly: tax and benefits differ — Salaried roles often include benefits (pension contributions, health insurance) that hourly positions may not. A higher annual salary can sometimes provide less take-home pay than a lower hourly wage with full benefits. Always compare net figures, not just gross numbers.
- Currency and exchange considerations — If you work across borders or receive pay in multiple currencies, conversion rates fluctuate daily. Lock in your assumptions when comparing offers, or calculate a range based on recent exchange rates rather than a single figure.