Annual Leave in Hours Explained

This is common for people who work:

• part-time
• shifts
• compressed hours
• different-length working days
• healthcare or rota-based schedules

For example:

75 hours of annual leave ÷ 7.5-hour paid shift = 10 shifts

Why is annual leave shown in hours?

Showing annual leave in hours can be more accurate than showing it only in days.

This is especially useful when working days are not all the same length.

For example:

• Monday = 9 paid hours
• Tuesday = 6 paid hours

If both were simply described as “one day”, that would hide the difference in the number of hours actually worked.

An hourly balance makes it possible to deduct the number of hours that would normally have been worked on the day or shift taken as leave.

This is one reason annual leave may be recorded in hours for shift workers, part-time workers and people with variable working patterns.

What does an annual leave balance in hours actually mean?

If your annual leave balance says 82 hours 30 minutes, that tells you how much paid leave time is available.

It does not automatically tell you how many days or shifts that represents.

To work that out, you need to know the length of your normal paid shift.

For example:

• Annual leave balance: 82h 30m
• Normal paid shift: 7h 30m

82h 30m ÷ 7h 30m = 11 shifts

So in this example, the leave balance represents 11 normal shifts.

If your shifts are different lengths, the number of actual shifts you can take may vary depending on which shifts are booked.

Annual leave hours to shifts

The easiest way to understand a leave balance in hours is often to convert it into your normal shifts.

The basic calculation is:

Annual leave hours ÷ paid shift length = equivalent shifts

Example 1: 60 hours of leave

• Annual leave balance: 60 hours
• Normal paid shift: 7.5 hours

60 ÷ 7.5 = 8 shifts

Example 2: 75 hours of leave

• Annual leave balance: 75 hours
• Normal paid shift: 10 hours

75 ÷ 10 = 7.5 shifts

This represents 7 full 10-hour shifts plus another 5 hours.

Example 3: 68 hours 30 minutes of leave

• Annual leave balance: 68h 30m
• Normal paid shift: 7h 30m

This gives: 9 full shifts + 1 hour remaining

You can calculate this automatically with the Hundred Hour Holiday Hours to Shifts Calculator.

Annual leave hours to days

You can also convert annual leave hours into days if your normal working day has a consistent paid length.

The formula is:

Annual leave hours ÷ paid hours in a normal working day = equivalent days

For example:

75 hours ÷ 7.5 hours = 10 days

So a worker with a consistent 7.5-hour working day could describe 75 hours of annual leave as 10 working days.

However, this becomes less useful if working days are different lengths.

If some shifts are 6 hours and others are 10 hours, a simple number of “days” does not tell you how many hours of leave will actually be used.

In that situation, keeping the balance in hours is often clearer.

Use paid shift length, not total time at work

When converting annual leave hours into shifts, the useful figure is usually the number of paid hours in the shift.

For example, you work from 8:00 to 16:00.

That is 8 hours between your start and finish time.

If you have a 30-minute unpaid break, your paid shift length is 7 hours 30 minutes.

So when converting an hourly leave balance into shifts, you would normally use 7h 30m rather than the full 8 hours between your start and finish time.

Your employer may have its own rules for recording leave, so check how your paid working hours are defined if you are unsure.

What if your shifts are different lengths?

If you work different-length shifts, an hourly annual leave balance becomes particularly useful.

For example, your normal week might include:

• Monday = 9 hours
• Tuesday = 9 hours
• Wednesday = 6 hours

If you take Monday as annual leave, 9 hours may be deducted.

If you take Wednesday as annual leave, 6 hours may be deducted.

So even though both are “one day off”, they do not use the same amount of leave.

This is why asking:

“How many days of annual leave do I have?”

may not always give a useful answer.

For some working patterns, the better question is:

“How many paid hours of leave do I have available?”

Annual leave in hours for part-time workers

Part-time workers may also see annual leave expressed in hours.

This can make it easier to account for a working pattern that does not fit a standard five-day week.

For example, someone may work:

• one 8-hour shift
• one 6-hour shift
• one 5-hour shift

Simply showing leave as a number of days can make it difficult to understand how much time is actually available.

An hourly balance can be deducted according to the hours that would normally have been worked.

If you work part-time and want a more detailed explanation, see Part-Time Annual Leave in Hours Explained.

Annual leave entitlement vs annual leave balance

These are two different things.

Annual leave entitlement

Your annual leave entitlement is the total amount of paid holiday you are entitled to during your leave year.

This may be expressed in:

• weeks
• days
• hours

depending on your employment and working pattern.

Annual leave balance

Your annual leave balance is the amount of leave you still have available.

Depending on how your employer’s system works, this may already account for:

• leave taken
• leave booked
• adjustments
• carry-over from another leave year

Hundred Hour is mainly designed to help you understand and convert a leave balance you have already been given.

If you need to check how much statutory annual leave you are legally entitled to, use official GOV.UK guidance or speak to your employer.

Taken, booked and remaining annual leave

It is also useful to separate leave that has already been taken from leave that has been booked for the future.

A simple leave record might look like this:

• Total annual leave allowance: 180 hours
• Leave already taken: 52.5 hours
• Future leave booked: 30 hours

Remaining unallocated leave:

180 − 52.5 − 30 = 97.5 hours

You could then convert the 97.5 hours into your normal shifts to see how much leave is still available to book.

For example, with a 7.5-hour paid shift:

97.5 ÷ 7.5 = 13 shifts

So the remaining 97.5 hours would represent 13 normal shifts.

Why hours can be more useful than days

Measuring annual leave in hours can be particularly useful when:

• shift lengths vary
• you work part-time
• you work compressed hours
• you book partial shifts
• your balance contains fractions of a working day
• different days of the week have different working hours

A balance such as 47 hours 30 minutes is precise.

Describing the same balance simply as “days” may lose that precision unless every working day is exactly the same length.