Skip to main content

Maths · Measure

Convert units

Convert one measure between compatible metric or time units.

Free to use and free to share. There is no sign-up, no score, and nothing a child does here is recorded or sent anywhere.

Practise it now

The football match starts 1h 20m after 08:05. Wind the clock forward to find out when.

This exercise practises convert units alongside its own main skill, Time & Money.

It covers most of this skill rather than all of it.

Loading the interactive exercise. Nothing you do here is saved or scored.

A worked example

One question of the kind this skill is tested with, worked all the way through: the reasoning, and what the wrong answers are there to catch.

Fractions of a kilogram

How many grams are in 110 of a kilogram?

The whole bar is one kilogram, worth 1000 grams.

  • A bar cut into 10 equal parts, with 1 of them shaded.
  1. 1000
  2. 100
  3. 10
  4. 10000

Answer: 100

How you get there

One kilogram is 1000 grams, so each of the 10 sections of the bar is 100 grams, which means 1 section comes to 100 grams.

Why the other answers tempt

The whole kilogram is not the answer - only part of it is shaded.

If they are stuck, say this

There are 1000 grams in one kilogram, so find one part of that first and then take 1 of them.

Now do it live in Clock & Coins

What this exercise is doing

Clock & Coins

The football match starts 1h 20m after 08:05. Wind the clock forward to find out when.

This engine’s own main skill is Time & Money. It practises convert units alongside it, and covers most of it rather than all.

Winding forward 1h 20m from 08:05 lands on 09:25 - the hour hand moves too, one twelfth as fast as the minute hand, which is why it sits between the numbers. Then 30p takes at least 3 coins from this tray: there is no 10p in it, so you have to build the amount from what is actually there.

  1. Step 1. Wind the clock. Wind the minute hand forward 1h 20m from 08:05.
  2. Step 2. Count the coins. A programme costs 30p. Drag coins into the purse to pay it exactly.

What to say if they get stuck

  1. Grab the long minute hand and wind it forwards. Watch the little hour hand creep round with it.
  2. One whole lap of the minute hand is one hour. You need 1h 20m.
  3. For the coins, start with the biggest coin that fits inside 30p and keep going.

Open Clock & Coins on its own page to share it

How convert units differs from the skills beside it

The same exercise practises several skills, and telling them apart is often the difficulty rather than the exercise itself. On this page the skill is: convert one measure between compatible metric or time units, and it stops where the quantity type and units are stated.

Related maths skills

All maths 11+ skills

Questions parents ask about convert units

Answered from what the skill map records about this skill, not from a template. Every answer here is on the page, and the same questions are the page's FAQ structured data.

Convert one measure between compatible metric or time units. It is one of 55 named maths skills in the 11+, in the measure strand, and this page carries 1 interactive exercise that practises it.

Knowing which maths topic to practise is most of the work

A free diagnostic covers arithmetic, fractions, geometry, measure and data handling, and comes back with the topics to spend the next few weeks on.