Measurement Conversions

Distance - Temperature - Clothing - Women's shoes - Men's shoes - Volume - Liquid volume - Units of Mass - Area

The Customary System of Measurement, also called the American System, is used more commonly in the US than the Metric System. However, in science classes, the International System of Units (Metric System) is used. Here are several charts to help you familiarise yourself with the American System as you prepare to go abroad:

Distance

American

Metric

1 inch (in)

2.54 cm

1 foot (ft) = 12 in

0.305 m

1 yard (yd) = 3 ft

0.914 m

1 mile (mi) = 1,760yd

1.609 km



Temperature

For those who want an exact conversion, the scientific formula for conversion is F= C(9/5) + 32.

However, for general approximations, a good rule of thumb for converting Celsius to Fahrenheit in your head is to double the temperature in Celsius and then add 30 (or subtract 30 from the temperature in Fahrenheit and then divide the difference by 2).

Example: (15 Celsius X 2) + 30 = 60 Fahrenheit.

Fahrenheit Celsius
0 -15
10 -10
20 -5
30 0
40 5
50 10
60 15
70 20
80 25
90 30
100 35



Clothing Sizes

US

4

6

8

10

12

14

UK

8

10

12

14

16

18



Women's Shoes

US Europe UK

5

35

2.5

5.5

35.5

3

6

36

3.5

6.5

37

4

7

37.5

4.5

7.5

38

5

8

38.5

5.5

8.5

39

6

9

40

6.5

9.5

41

7

10

42

7.5



Men's Shoes

US

Europe

UK

6.5

39

6

7

40

6.5

7.5

40.5

7

8

41

7.5

8.5

42

8

9

42.5

8.5

9.5

43

9

10

44

9.5

10.5

44.5

10

11

45

10.5

11.5

45.5

11

12

46

11.5

13

47.5

12



Volume

American

Metric

1 cubic inch (in3)

16.39 mL

1 cubic foot (ft3)

 



Liquid Volume

American

Metric

1 teaspoon (tsp)

4.93 mL

1 tablespoon (tbsp) = 3 tsp

14.79 mL

1 fluid ounce (fl oz) = 2 Tbsp

29.57 mL

1 cup (c) = 8 fl oz

236.59 mL

1 pint (pt) = 2 cp

473.18 mL

1 quart (qt) = 2 pt

0.95 L

1 gallon (gal) = 4 qt

3.79 L

1 (liquid) barrel (bbl) = 1.5 gal

5.68 L 



Units of Mass

American

Metric

1 ounce (oz)

28.4 g

1 pound (lb) = 16 oz

0.45 kg



Area

American

Metric

1 square survey foot (ft2) = 144 in2

0.09 m2

1 acre = 43,560 ft2

4,046.87 m2

1 section = 640 acres or 1 mi2 (survey)

2.59 km2