**Year 4 Maths – Convert Minutes to Hours ** *KS2 Revision*

## What you need to know

**Things to remember:**

- 1 hour = 60 minutes
- Quarter of an hour is 15 minutes
- Half of an hour is 30 minutes
- Three quarters of an hour is 45 minutes.
- To divide by 60 we can divide by 10 and then 6, or the other way.

It is important to learn some simple conversions for time:

**Quarter of an hour is 15 minutes**

**Half an hour is 30 minutes**

**Three quarters of an hour is 45 minutes**

**1 hour is 60 minutes**

We have two ways of converting minutes into hours.

**Method 1: Division**

How many hours are in 240 minutes?

Because there are 60 minutes in an hour, when we turn minutes into hours we have to divide by 60.

240\div 60=4

The answer is 4 hours!

**Tip:** This is tricky though, so we can do this in two easier steps:

**Step 1: **Divide by 10 to remove a zero.

240\div 10=24

**Step 2: **Divide by 6.

24\div6=4

So, we got the same answer of 4 hours.

**Method 2: Addition **

What is 150 minutes in hours?

If we used **Method 1 **to divide we’d get a decimal, so let’s count up until we have too many minutes.

Hours 1 2 3 4 5 6

Minutes 60 120 180 240 300 360

If we count up, we can see that 3 hours is 180 minutes, which is too many. So, what do we do? We stop at 2 hours and see how many minutes we have left.

150 - 120 = 30

We have 30 minutes left, which we know is half an hour. So, in total, there are 2 and a half hours.

## Example Questions

**Question 1:** What is 540 minutes in hours?

**Step 1: **Divide by 10 to remove a zero.

540\div 10=54

**Step 2: **Divide by 6.

54\div6=9

So, 540 minutes is the same as 9 hours.

**Question 2:** What is 225 minutes in hours?

If we count up, we can see that 4 hours is 240 minutes, which is too many. We stop at 3 hours, 180 minutes, and see how many minutes we have left.

225 – 180 = 45

We have 45 minutes left, which we know is three quarters of an hour. So, in total, there are 3- and three-quarter hours.