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?

Answer

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?

Answer

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.