Finance & Business
Salary Calculator
Convert between different salary periods and calculate your earnings on an annual, monthly, weekly, daily, or hourly basis.
Reviewed by the calculator.uk.com Team · Last reviewed 17 September 2026 · Our methodology
Enter salary amount and period to see conversions
The biggest source of error when converting UK pay is the length of the working week. Many office contracts are 37.5 hours (9–5:30 with an unpaid hour for lunch), while this calculator assumes a 40-hour week. At £20 an hour that difference alone is worth £2,600 a year. The table shows both, using the minimum wage rates that apply from 1 April 2026.
| Hourly rate | Annual (37.5h) | Monthly (37.5h) | Annual (40h) | Monthly (40h) |
|---|---|---|---|---|
| £8.00 (under-18 / apprentice minimum) | £15,600 | £1,300 | £16,640 | £1,387 |
| £10.85 (minimum for ages 18–20) | £21,158 | £1,763 | £22,568 | £1,881 |
| £12.71 (National Living Wage, 21+) | £24,785 | £2,065 | £26,437 | £2,203 |
| £15.00 | £29,250 | £2,438 | £31,200 | £2,600 |
| £18.00 | £35,100 | £2,925 | £37,440 | £3,120 |
| £20.00 | £39,000 | £3,250 | £41,600 | £3,467 |
| £25.00 | £48,750 | £4,063 | £52,000 | £4,333 |
| £30.00 | £58,500 | £4,875 | £62,400 | £5,200 |
Worked example: comparing a salaried and an hourly job offer
Sarah is choosing between a salaried role at £30,000 for 37.5 hours a week and a contract role paying £15.50 an hour for 40 hours.
- Salaried role: £30,000 ÷ 52 ÷ 37.5 = £15.38 an hour
- Hourly role: £15.50 × 40 × 52 = £32,240 a year, if every week is paid
The hourly role looks £2,240 better, but she should check what it includes. A salaried employee gets paid holiday. If the hourly rate doesn't include holiday pay and she takes the 28 days of statutory leave unpaid, she loses 5.6 weeks of pay (£3,472), and the salaried job comes out ahead. She is also working 2.5 more hours a week for the money.
Part-time and pro-rata pay
A job advertised as "£30,000 pro rata, 3 days a week" pays 3/5 of the full-time salary: £18,000 a year. Part-time workers are legally entitled to the same hourly rate and proportional holiday as full-time colleagues doing comparable work.
Monthly pay: 4.33 weeks, not 4
A year has 52 weeks, which is 4.33 weeks a month (52 ÷ 12), not 4. Converting £2,500 a month to weekly pay by dividing by 4 gives £625 — the correct figure is £576.92. This calculator uses 4.33 weeks per month, so its annual figures are within 0.1% of a 52-week year.
Related to Salary Calculator
The salary calculator uses standard working time conventions to convert between different pay periods. It assumes a typical work schedule of 8 hours per day, 5 days per week, 4.33 weeks per month (52 weeks ÷ 12 months), and 12 months per year. These standardized values help provide consistent conversions between different pay periods.
Conversion Formulas
The calculator uses the following conversion factors: - Daily rate = Hourly rate × 8 hours - Weekly rate = Daily rate × 5 days - Monthly rate = Weekly rate × 4.33 weeks - Annual rate = Monthly rate × 12 months
When you enter a salary amount and select a pay period, the calculator automatically computes the equivalent amounts for all other pay periods using these standardized conversions. This helps you understand your earnings across different time periods and makes it easier to compare job offers or understand your pay structure.
The calculator provides a comprehensive breakdown of your salary across different pay periods. This helps you understand your earnings from multiple perspectives and plan your finances accordingly. The results are particularly useful for budgeting, comparing job offers, or negotiating compensation.
Understanding Pay Periods
- Hourly Rate: Your pay per hour of work - Daily Rate: Your pay for a standard 8-hour workday - Weekly Rate: Your pay for a standard 40-hour work week - Monthly Rate: Your pay for an average month (4.33 weeks) - Annual Rate: Your total yearly salary
Keep in mind that these calculations are based on standard working hours and may not reflect exact amounts if your working pattern differs from the standard 40-hour week. Actual earnings may vary based on overtime, part-time arrangements, or specific employment contracts.
1. Why do monthly calculations use 4.33 weeks instead of 4?
There are 52 weeks in a year, which means an average month has 52/12 = 4.33 weeks. Using 4.33 weeks provides more accurate monthly salary calculations than using exactly 4 weeks, as it accounts for months having slightly more than 4 weeks.
2. Does the calculator account for taxes and deductions?
No, this calculator provides gross salary conversions before any taxes or deductions. For accurate take-home pay, you would need to consider income tax, National Insurance contributions, pension contributions, and other deductions specific to your situation.
3. What if I work different hours than the standard 40-hour week?
The calculator uses standard working hours (8 hours per day, 5 days per week) for consistency. If your working pattern differs, you may need to adjust the results proportionally to reflect your actual working hours.
4. Can I use this calculator for part-time work?
Yes, but you'll need to interpret the results based on your actual working hours. For example, if you work 20 hours per week instead of 40, you would expect to earn approximately half of the calculated weekly, monthly, and annual amounts.
5. What is the scientific source for this calculator?
Annual-to-hourly and hourly-to-annual conversions use the standard 52-weeks-a-year basis, with the widely used monthly conversion factor of 4.33 weeks (52 ÷ 12) for turning weekly figures into monthly ones. The default 40-hour working week reflects common working-time conventions referenced by the International Labour Organization (ILO), and is broadly consistent with the working patterns underlying the UK Office for National Statistics' (ONS) earnings statistics.