How the calculation works
The calculator turns the hourly wage into a weekly amount, then into a yearly amount of 52 weeks, and divides by 12 for a month.
Yearly = hourly × hours per week × 52
Monthly = yearly ÷ 12
Hourly = monthly × 12 ÷ (52 × hours per week)
Holiday allowance is added on top of the yearly amount: yearly × (1 + allowance ÷ 100).Worked examples
Hourly to salary: 20 an hour, 40 hours a week, 8% holiday allowance.
- Per week: 20 × 40 = 800.
- Per year: 800 × 52 = 41,600. Per month: 41,600 ÷ 12 = 3,466.67.
- Per year with holiday allowance: 41,600 × 1.08 = 44,928.
Salary to hourly: 3,500 a month, 36 hours a week.
- 3,500 × 12 ÷ 52 = 807.69 a week.
- 807.69 ÷ 36 = 22.44 an hour.
What this calculator does not include
- Income tax, social contributions and pension.
- Overtime, bonuses and a thirteenth month.
- Unpaid days, public holidays and different working weeks.
Amounts are rounded for display only; the calculation itself is not rounded. Results are estimates for information, not financial advice. Last updated: 12 November 2026.
Frequently asked questions
How do I turn an hourly wage into a monthly salary?
Multiply the hourly wage by the hours per week and by 52 weeks, then divide by 12. At 20 an hour and 40 hours a week that is 20 × 40 × 52 ÷ 12 = 3,466.67 a month.
How do I turn a monthly salary into an hourly wage?
Multiply the monthly salary by 12, then divide by 52 weeks and by the hours per week. 3,500 a month at 36 hours a week is 3,500 × 12 ÷ 52 ÷ 36 = 22.44 an hour.
Is this before or after tax?
Before tax. All amounts are gross. The calculator does not work out income tax or social contributions.
What is holiday allowance?
In some countries, such as the Netherlands, employers pay a holiday allowance of at least 8% of the yearly salary on top of the monthly pay. Enter your percentage to see the yearly amount with it. Leave it at 0 if it does not apply.
Why 52 weeks and not 52.14?
52 weeks is the common convention for converting an hourly wage. A year has a little more than 52 weeks, so some employers use 52.14. The difference is about 0.3%.