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 multiply by 60, multiply by 6 and put a 0 on the end.

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

A car drives for 3 and three quarters hours, how long is this in minutes?”

We will do this in three steps:

Step 1: Convert the full hours into minutes

3 hours = 3\times60 minutes = 180minutes

Tip: Multiply by 6 and put a 0 on the end.

3\times6 = 18

3 hours = 180 minutes

Step 2: Convert the extra bit to minutes

Three quarters of an hour = 45 minutes

Step 3: Add the minutes from Step 1 and Step 2 together

180 minutes + 45 minutes = 225 minutes

Example Questions

Question 1: Convert 4 and a half hours into minutes.

Answer

Step 1: Convert the full hours into minutes

 

4 hours = 4\times60 minutes = 240minutes

 

Step 2: Convert the extra bit to minutes

 

Quarter of an hour = 15 minutes

 

Step 3: Add the minutes from Step 1 and Step 2 together

 

240 minutes + 15 minutes = 255 minutes

Question 2: Convert 1 and a half hours into minutes.

Answer

Step 1: Convert the full hours into minutes

 

1 hours = 60minutes

 

Step 2: Convert the extra bit to minutes

 

Half an hour = 35 minutes

 

Step 3: Add the minutes from Step 1 and Step 2 together

 

60 minutes + 30 minutes = 90 minutes