Useful next calculations
When to use this calculator
- When you need a fast estimate before making a bigger decision.
- When you want to compare a few scenarios using the same assumptions.
- When you need a clearer starting point before using a detailed quote or formal document.
- When you want to sanity-check a figure you have seen elsewhere.
A worked example
These are the example figures the calculator opens with.
| Input | Value |
|---|---|
| Hours Per Week | 37.5 |
| Days Per Week | 5 |
| Weeks employed in leave year (regular) / weeks actually worked (irregular) | 52 |
| Working pattern | Regular hours — proportion of leave year employed |
For those figures the calculator returns:
- Statutory days: 28.00 days
- Hours entitlement: 210.00hrs
Method & assumptions
Regular-hours workers receive 5.6 weeks of statutory annual leave, capped at 28 days, proportionately reduced here by the part of the leave year employed. Include bank holidays if your employer counts them toward that allowance. This estimates entitlement, not holiday pay.
For irregular-hours or part-year workers, select the accrual basis and enter average weekly hours and weeks actually worked in the period. The tool estimates 12.07% of those hours and rounds the period total to the nearest hour. Employers must calculate and round accrual in each pay period; aggregated estimates can differ. Sickness, statutory leave accrual and enhanced contractual leave are not included.
Common mistakes
- Using optimistic assumptions without testing a more cautious scenario.
- Comparing outputs from different tools without checking that the inputs match.
- Treating the result as a final quote instead of a planning estimate.
- Rounding inputs too aggressively.
What to do next
- Try at least one more scenario so you can compare a realistic range.
- Use the related calculators below to cross-check the decision from another angle.
- Write down the key outputs from your best scenarios before you decide.
- If the result surprises you, change one input at a time to isolate the driver.