Free online math practice

Common exact unit conversions Practice

Exact conversions between common units of length, weight, time, and volume.

Start practicingCommon exact unit conversions

Free to practice.
No account required.
Progress stays on this device.

What you’ll practice

Choose the conversion factor so unwanted units cancel. These are exact relationships, so do not round a fraction unless a different task explicitly asks for it.

Where this helps

Measurement, science, cooking, and checking whether answers make sense.

Before you start

Use this topic to practice math you have already learned. The examples show the available kinds of recall tasks; this is not a complete textbook chapter. Check the answer form and any stated conditions.

Try a few examples