Converting Units of Mass — Interactive Lesson (Year 5)

How many grams are left after giving away 600 g of oranges? This 15-slide interactive lesson teaches converting units of mass between grams, kilograms and tonnes.

Mastering Converting Units of Mass in Year 5 Maths

Pupils learn to solve problems involving the calculation and conversion of units of measurement, and to use, read, write and convert between metric units of mass. They learn the key facts that 1 kilogram equals 1,000 grams and 1 tonne equals 1,000 kilograms, then apply this to problems such as converting 3,709 grams to kilograms, choosing tonnes as the most appropriate unit for the mass of a car, and working out grams left after giving 600 g away from a 5 kg bag of oranges.

What’s Included

• 15-slide interactive lesson on converting units of mass
• Learning objectives on calculating and converting mass
• The key conversions: 1 kg = 1,000 g and 1 tonne = 1,000 kg
• Choosing the most appropriate unit for a given object
• Real-life problems with fruit, sweets and body mass, with instant feedback

Key Benefits for Students

• Builds fluency converting between grams, kilograms and tonnes
• Practises choosing the most sensible unit for a context
• Real-life objects make conversions concrete
• Instant feedback on answer questions

Why Teachers Love It

• No prep — ready for whole-class teaching on an interactive whiteboard
• A concise lesson that fits a single session
• Self-marking questions support independent practice
• Suits teaching, revision and homework
• A dependable companion to converting units of capacity

Love this? You’ll love…

• Estimating Volume And Capacity — Interactive Lesson (Year 5)
• Converting Units of Capacity — Interactive Lesson (Year 5)
• Reading Measurement Scales — Interactive Lesson & Activities (Year 5)

A dependable addition to a Year 5 measurement topic, giving pupils a reliable method for converting mass using the key 1,000 g and 1,000 kg facts. This conversion skill transfers directly to converting capacity and length in metric units.

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FAQs

What year group is this for?
Year 5 (ages 9–10), KS2.

Does it cover tonnes as well as grams and kilograms?
Yes — all three metric units of mass are covered.

Is it self-marking?
Yes, with instant feedback on the questions.