Conversion graphs

The Maths Habit

This ruler has two edges. What is different about them?

0123456789101112131415012345cminches

One edge is centimetres. The other is inches. One length has two numbers.

Conversion graph
A straight line graph that changes one unit into another.
cminches
Convert
Change a measure into a different unit.
Axis
A number line along the bottom or the side of a graph.
cm
Unit
What a measure is counted in.

Convert 12 inches into centimetres.

024681012141618205101520253035404550InchesCentimetres
  1. 1Find the number.On the bottom axis.
  2. 2Go up to the line.Up from the number, until you meet the line.
  3. 3Go across and read.Across to the side axis. Read the number.
  4. 12 inches = 30 cm

Convert £16 into dollars.

04812162024283236405101520253035404550Pounds (£)Dollars ($)
1Find the number.2Go up to the line.
3Go across and read.
£16 =$20

Convert £25 into euros.

051015202530354045506121824303642485460Pounds (£)Euros (€)
1Find the number.2Go up to the line.
3Go across and read.
£25 =€30

Convert £16 into dollars.

04812162024283236405101520253035404550Pounds (£)Dollars ($)
1Find the number.2Go up to the line.
3Go across and read.
£16 =$20

Convert 8 gallons into litres.

024681012141618209182736455463728190GallonsLitres
1Find the number.2Go up to the line.
3Go across and read.
8 gallons =36litres
1Find the number.2Go up to the line.3Go across and read.

Convert £16 into dollars.

04812162024283236405101520253035404550Pounds (£)Dollars ($)
1Find the number.2Go up to the line.
3Go across and read.
£16 =$20

Convert 4 feet into centimetres.

012345678910306090120150180210240270300FeetCentimetres
1Find the number.2Go up to the line.
3Go across and read.
4 feet =120cm
1Find the number.2Go up to the line.3Go across and read.

Convert £16 into dollars.

04812162024283236405101520253035404550Pounds (£)Dollars ($)
1Find the number.2Go up to the line.
3Go across and read.
£16 =$20

Convert 35 miles into kilometres.

051015202530354045508162432404856647280MilesKilometres
1Find the number.2Go up to the line.
3Go across and read.
35 miles =56km
1Find the number.2Go up to the line.3Go across and read.

1Convert 16 inches into centimetres.

024681012141618205101520253035404550InchesCentimetres
1Find the number.
2Go up to the line.
3Go across and read.
16 inches =40cm

2Convert £10 into euros.

051015202530354045506121824303642485460Pounds (£)Euros (€)
1Find the number.
2Go up to the line.
3Go across and read.
£10 =€12

3Convert 45 miles into kilometres.

051015202530354045508162432404856647280MilesKilometres
1Find the number.
2Go up to the line.
3Go across and read.
45 miles =72km
1Find the number.2Go up to the line.3Go across and read.

Which axis do you start on?

051015202530354045508162432404856647280MilesKilometres
  1. 1Convert 30 miles into kilometres.Miles
  2. 2Convert 40 km into miles.Kilometres
  3. 3How many miles is 24 km?Kilometres

Convert 25 cm into inches.

024681012141618205101520253035404550InchesCentimetres
  1. 1Find the number.On the side axis.
  2. 2Go across to the line.Across from the number, until you meet the line.
  3. 3Go down and read.Down to the bottom axis. Read the number.
  4. 25 cm = 10 inches

Convert $40 into pounds.

04812162024283236405101520253035404550Pounds (£)Dollars ($)
1Find the number.2Go across to the line.
3Go down and read.
$40 =£32

Convert 24 km into miles.

051015202530354045508162432404856647280MilesKilometres
1Find the number.2Go across to the line.
3Go down and read.
24 km =15miles

Convert $40 into pounds.

04812162024283236405101520253035404550Pounds (£)Dollars ($)
1Find the number.2Go across to the line.
3Go down and read.
$40 =£32

Convert €54 into pounds.

051015202530354045506121824303642485460Pounds (£)Euros (€)
1Find the number.2Go across to the line.
3Go down and read.
€54 =£45
1Find the number.2Go across to the line.3Go down and read.

Convert $40 into pounds.

04812162024283236405101520253035404550Pounds (£)Dollars ($)
1Find the number.2Go across to the line.
3Go down and read.
$40 =£32

Convert 72 litres into gallons.

024681012141618209182736455463728190GallonsLitres
1Find the number.2Go across to the line.
3Go down and read.
72 litres =16gallons
1Find the number.2Go across to the line.3Go down and read.

Convert $40 into pounds.

04812162024283236405101520253035404550Pounds (£)Dollars ($)
1Find the number.2Go across to the line.
3Go down and read.
$40 =£32

Convert 150 cm into feet.

012345678910306090120150180210240270300FeetCentimetres
1Find the number.2Go across to the line.
3Go down and read.
150 cm =5feet
1Find the number.2Go across to the line.3Go down and read.

1Convert 35 cm into inches.

024681012141618205101520253035404550InchesCentimetres
1Find the number.
2Go across to the line.
3Go down and read.
35 cm =14inches

2Convert $15 into pounds.

04812162024283236405101520253035404550Pounds (£)Dollars ($)
1Find the number.
2Go across to the line.
3Go down and read.
$15 =£12

3Convert 64 km into miles.

051015202530354045508162432404856647280MilesKilometres
1Find the number.
2Go across to the line.
3Go down and read.
64 km =40miles
1Find the number.2Go across to the line.3Go down and read.

Is it right? Thumbs up or thumbs down.

051015202530354045508162432404856647280MilesKilometres
  1. A10 miles = 16 kmRight
  2. B40 km = 64 milesWrong: 25 miles
  3. C48 km = 30 milesRight
  4. D40 miles = 25 kmWrong: 64 km

Conversion graphs worksheet, page 1

Conversion graphs worksheet, page 2

Answer sheet

  1. 10 inches = 25 cm. How many centimetres is 30 inches?

    75 cm

  2. The graph stops at 50 miles. How can you convert 100 miles into kilometres?

    160 km (double 80 km)

  3. £5 = €6. Which is more money, £20 or €20?

    £20 (£20 = €24)

  1. Convert 10 inches into centimetres. 1Find the number.2Go up to the line.3Go across and read.

    25 cm
    02468101251015202530InchesCentimetres

  2. Convert $20 into pounds. 1Find the number.2Go across to the line.3Go down and read.

    £16
    0481216202451015202530Pounds (£)Dollars ($)

  3. In question 2, how many dollars is £12?

    $15
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