Unit conversion game for kids: metric units

Your child completes conversions such as 3 km into metres or 2 h into minutes. Length, mass, capacity and time: they pick the right result among four.

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ages 11-13✓ Free, no account, no ads✈️ Works offline

What your child practises

Converting length, mass and capacity
Converting hours, minutes and seconds
Understanding kilo, centi and milli

Supports measurement and metric units in upper primary and lower secondary.

How to play

Four options, only one correct. A mistake costs nothing, but a streak of right answers does count: that is what makes you progress.

Install Poroki on your phone or tablet

Once installed, Poroki opens from the home screen like an app and works without internet: in the car, on a plane, at the grandparents'. No app store, no account, no ads.

✈️ Plays offline

📱 An icon on the home screen

🔒 No data collected on your child

Parents' questions

Is Measures really free?

Yes. Poroki is free, with no ads and no in-game purchases. It is funded by voluntary donations.

What age is it for?

Measures is designed for children aged 11-13. The level adapts to your child's answers.

Can my child play without internet?

Yes. Install Poroki from your browser to the home screen and every game then works offline.

Do I need an account?

No. Your child can play straight away. An optional parent space, with no email address, lets you follow progress and set play time.

Unit conversion game for kids: metric units

What your child practises

How to play

More games for ages 11-13

Install Poroki on your phone or tablet

Parents' questions

This game is also available in