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Part time salary calculator: pay, hourly rate and holiday

Use this part time salary calculator to work out your pro-rata pay: enter full-time hours, part-time hours and the full-time salary, and you see the percentage of a full-time role, the part-time pay, the unchanged hourly rate and the holiday you keep. A table shows what each number of hours is worth.

Example: Hours per week, full-time 40 · Your hours per week, part-time 24 · Full-time gross salary (per month) 3,000 · Holiday days, full-time 28 · Working days per week, full-time 5 · Working days per week, part-time 3 → Part-time gross pay per month: 1,800.00. Source: GOV.UK – Part-time worker rights (pay and holiday pro rata). Updated: .

The full-time week in your workplace, for example 37.5 or 40.
What you would earn on the full-time role.
Working days per year on a five-day week (including bank holidays if your contract does).
If you spread the hours over fewer days, the number of holiday days falls too – the weeks of holiday stay the same.
Enter a monthly amount to see how many weekly hours it takes. Leave at 0 if not needed.
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Result

Part-time gross pay per month
1,800.00
Share of a full-time role
60%
Gross hourly rate (stays the same)
17.31
Less than full-time per month
1,200.00
Less than full-time per year
14,400.00
Each hour less per week costs you gross per month
75.00
Holiday days, part-time
16.8
Gross pay by weekly hours
Hours per weekShare of full-timeGross per monthGross per year
1025 %750.009,000.00
1538 %1,125.0013,500.00
2050 %1,500.0018,000.00
24 ◀60 %1,800.0021,600.00
2563 %1,875.0022,500.00
3075 %2,250.0027,000.00
3588 %2,625.0031,500.00
40100 %3,000.0036,000.00
All amounts are gross, before tax and social contributions. Net pay does not change in the same proportion.

How it is calculated

Part-time pay follows from the share of a full-time role: part-time hours divided by full-time hours, times the full-time salary. At 24 of 40 hours that is 60%, so a 3,000 salary becomes 1,800.

How the calculator works

Why pro rata is the rule

In the UK, part-time workers must not be treated less favourably than comparable full-time colleagues, and pay and holiday are normally given pro rata – in proportion to the hours worked. The same pro rata principle appears in the EU part-time work directive. It means no bonus for fewer hours, but no penalty either.

What the calculator cannot do

It only works with gross pay. Tax, national insurance or other contributions depend on your country and circumstances; take-home pay usually falls by less than gross pay. Collective agreements and employers may have their own rules. All entries stay in your browser.

Frequently asked questions

How do I calculate part-time pay?

Divide part-time hours by full-time hours and multiply by the full-time salary. At 24 of 40 hours and a salary of 3,000, that is 1,800.

How do I convert part-time hours to a percentage?

Part-time hours ÷ full-time hours × 100. 24 of 40 hours is 60%, 30 of 40 hours is 75%.

Does my hourly rate change when I go part-time?

No. Pay and hours fall in the same proportion, so the gross hourly rate stays the same.

How much holiday do I get part-time?

If you work fewer hours on the same number of days, your holiday stays the same. If you work fewer days, holiday days = full-time days × part-time days ÷ full-time days; the weeks of holiday stay the same.

How many hours do I need for a certain salary?

Enter the target pay: the calculator shows the weekly hours needed at your full-time salary.

Is this the amount I will take home?

No. It is gross pay. Tax and other deductions depend on your country, so your take-home pay will differ.

Sources and legal basis

As of: · Editorial policy

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