Imperial Units of Weight

Which of these imperial units is used to measure weight?

• Gallon• Ounce• Feet• Pound• Inch• Fluid Ounce• Pint• Stone

Weighing in imperial units• When weighing

everyday objects in imperial units, we use pounds and ounces.

• There are sixteen ounces in one pound.

• So how many ounces are in two pounds?

We are going to focus on ounces

• One ounce weighs the same as 28.35 grams

• What is this to the nearest whole number?

• That’s right! 28 grams

• So 1 ounce = 28 grams

OLI – To convert different weights from ounces to grams

• Remember that 1 ounce = 28 grams

• What method is used to calculate grams?

• For example how would we calculate:

• 6 ounces = _____ grams

• 6 x 28 = 168grams

OLI – To convert different weights from ounces to grams

• Success Criteria

• Simply multiply the number of ounces by 28 to find the equivalent in grams.

• Remember that ounces can be written oz