📏 Length, Mass and Capacity

Measure everything around you with confidence!

📖 Learn
Units and conversions

✏️ Examples
Worked problems

🔬 Visualiser
Unit converter tool

🎯 Practice
20 mixed questions

📖 Measurement

1. Length

Unit	Symbol	Key conversion
millimetre	mm	10 mm = 1 cm
centimetre	cm	100 cm = 1 m
metre	m	1000 m = 1 km
kilometre	km	—

cm → mm: × 10 | mm → cm: ÷ 10
m → cm: × 100 | km → m: × 1000

2. Mass

Unit	Symbol	Key conversion
gram	g	1000 g = 1 kg
kilogram	kg	—

kg → g: × 1000 | g → kg: ÷ 1000

Example: 2 kg = 2 × 1000 = 2000 g

3. Capacity

Unit	Symbol	Key conversion
millilitre	ml	1000 ml = 1 L
litre	L	—

L → ml: × 1000 | ml → L: ÷ 1000

Example: 3 L = 3 × 1000 = 3000 ml

4. Reading Scales

To read a scale:

1. Find what each small division is worth.

2. Count the divisions from the last marked number.

3. Add to the last marked value.

Example: Scale 0–100, 10 divisions → each division = 10. Pointer at 6th = 60

5. Comparing and Ordering

Always convert to the same unit before comparing or ordering!

Example: Which is longer — 150 cm or 2 m?

Convert: 2 m = 200 cm. So 200 cm > 150 cm. 2 m is longer.

✏️ Worked Examples

Example 1 – cm to mm

Convert 5 cm to mm.

10 mm = 1 cm

5 cm = 5 × 10

= 50 mm

Example 2 – m to cm

Convert 3 m to cm.

100 cm = 1 m

3 m = 3 × 100

= 300 cm

Example 3 – kg to g

Convert 1.5 kg to g.

1000 g = 1 kg

1.5 kg = 1.5 × 1000

= 1500 g

Example 4 – L to ml

Convert 2.5 L to ml.

1000 ml = 1 L

2.5 L = 2.5 × 1000

= 2500 ml

Example 5 – Ordering Lengths

Order smallest to largest: 1 m, 50 cm, 150 cm, 2 m.

Convert all to cm: 100, 50, 150, 200

Order: 50, 100, 150, 200

= 50 cm, 1 m, 150 cm, 2 m

🔬 Measurement Converter

Unit Converter

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Quick Reference

📏 10 mm = 1 cm

📏 100 cm = 1 m

📏 1000 m = 1 km

⚖️ 1000 g = 1 kg

🥛 1000 ml = 1 L

Exercise 1 – Centimetres to Millimetres

Convert each measurement from cm to mm. (×10)

Exercise 2 – Metres to Centimetres

Convert each measurement from m to cm. (×100)

Exercise 3 – Kilograms to Grams

Convert each measurement from kg to g. (×1000)

Exercise 4 – Litres to Millilitres

Convert each measurement from L to ml. (×1000)

Exercise 5 – Order Measurements

For each question, what position (1=smallest) does the highlighted measurement hold?