How to use
- Choose how your holiday is worked out: Days a week for a fixed number of days, Hours a week for fixed hours, or Irregular hours if your hours change from one pay period to the next or you only work part of the year.
- Enter the days (half days as .5) or hours you work. For irregular hours, enter the hours worked in the pay period.
- Choose whether you want a full leave year, or holiday for someone starting, leaving, or starting and leaving part way through. Add the dates the calculator asks for.
- Tick My employer counts bank holidays to see how many days are left to book after bank holidays.
The rules and rounding match GOV.UK’s own holiday entitlement calculator.
How it is calculated
- Statutory leave is 5.6 weeks a year, capped at 28 days.
- Days a week: 5.6 × days worked per week. 5 days or more gives 28 days.
- Hours a week: the days figure × your average working day (hours per week ÷ days per week). 37.5 hours over 5 days gives 28 × 7.5 = 210 hours.
- Starting part way through: the year’s entitlement × months left in the leave year ÷ 12, rounded up to the nearest half day.
- Leaving part way through: the year’s entitlement × days from the start of the leave year to the leaving date ÷ 365 (366 if the leave year includes 29 February).
- Irregular hours and part-year workers: 12.07% of the hours worked in each pay period, rounded to the nearest hour.
Results are rounded up to one decimal place, as GOV.UK does, because employers can round up but not down.
Examples
| Pattern | Statutory holiday |
|---|---|
| 5 days a week | 28 days |
| 4 days a week | 22.4 days |
| 3 days a week | 16.8 days |
| 2.5 days a week | 14 days |
| 6 days a week | 28 days (capped) |
| 37.5 hours over 5 days | 210 hours |
| 20 hours over 3 days | 112 hours |
| 160 irregular hours in a month | 19 hours |
Starting part way: with a leave year from 1 January, someone working 5 days a week who starts on 15/06/2026 has 7 months left, so 28 × 7 ÷ 12 = 16.33, rounded up to 16.5 days.
Leaving part way: the same worker leaving on 15/06/2026 has worked 166 days of the leave year, so 28 × 166 ÷ 365 = 12.73, rounded up to 12.8 days.
Bank holidays
Bank holidays do not have to be given as paid leave, and your employer can count them as part of your 5.6 weeks. In 2026, England and Wales have 8 bank holidays, Scotland has 9 and Northern Ireland has 10. Part-time workers should not be treated less favourably, so their holiday is worked out pro rata rather than by the bank holidays that happen to fall on their working days.