Here is a bag of flour. The label says 2.5 kg. If we wanted to write that same mass in grams instead, what would we write?

The interactive shows a conversion ladder between kilograms and grams. Kilograms sit one rung above grams, and each rung down shows the digits moved three place-value columns to the left, that is × 1000. Look at each example, then hands up to say which way the digits moved.

• 1.75 kg → g
• 500 g → kg
• 0.4 kg → g
• 8 g → kg

• 3 kg → g
• 250 g → kg
• 1.2 kg → g
• 0.75 kg → g
• 6 g → kg (the tricky one)