Imperial Units

Imperial Units

Basic, GCSE(F),

Imperial Units have a number of different units for each type of measurement. There is no standard relationship between the different units. The abbreviations are is shown in brackets.

Length:
1 foot (ft) = 12 inches (in)
1 yard (yd) = 3 feet (ft)

Mass:
1 pound (lb) = 16 ounces (oz)
1 stone (st) = 14 pounds (lb)

Capacity
1 gallon (gal) = 8 points (pt)

To convert between different units, draw a small table with the conversion on the first line, and the amount to be converted on the second. Then determine whether to multiply or divide during conversion.

Examples

1. Convert 42 inches to feet and inches.

Answer: 3 feet 6 inches

feet-->inches
1x12
42÷12 = 3rem642

2. Convert 300 ounces to stones, pounds and ounces.

Answer: 1 stone, 4 pounds, 12 ounces (1st 4lb 12oz)

First convert the ounces to pounds:

pounds-->ounces
1x16
300÷16 = 18rem12300

An inverse operation: 300 ÷ 16 = 18 remainder 12, or 18 pounds 12 ounces. Next, convert the 18 pounds to stones:

stones-->pounds
1x14
16÷14 = 1rem416

Another inverse operation: 16 ÷ 14 = 1 remainder 4, so 1 stone 4 pounds. Include the 12 ounces from the first operation.