Unit Conversion Trainer

Quick, fun drills to build “instant conversion” intuition.

Impress your friends and family with your unit conversion skills 🧠✨

Become the person who can casually convert kg↔lb, km↔mi, °C↔°F and more — without fumbling for Google. It’s a tiny skill that makes you look like a real numbers whiz. Because, really — all great wizards master transmutation.

How it works: pick a conversion, then you get 5 rounds. You have 10 seconds each. Your score is your average percent error across rounds — lower is better.

Round: 0/5
Score: 0.00%
Time: 10.0s
Choose a conversion mode and press “Start 5-round run”.

How to do this conversion (quick mental tricks)

Verdict
Correct answer:
Your answer:
Absolute difference:
Percent error (this round):
Ready when you are.