Practice
Build the bridge yourself. Pick a subject and a level, drag each conversion piece into place, then cross out the matching units by hand to prove your setup cancels down to the target. Hints stay on as long as you want them.
Quiz
Every quiz uses freshly randomized numbers. Drag each piece into place, cross out the units yourself, then compute the answer — no hints here, just like the real thing.
Score Sheet
Your overall score combines all three sections — see the breakdown below, any time.
Reference tables
Keep this open while you work — nobody memorizes this on day one. It's also one tap away from Practice or Quiz via the 📐 Reference button.
Metric prefixes
| Prefix | Symbol | Multiplies base unit by |
|---|