Chemistry · Chapter 1

Chain the Factors, Watch the Units Cancel

Start with a measurement and multiply it by one, over and over. Only the factors that can cancel your current unit are offered, so the chain always stays honest.

Your chain cancelled units are struck through

A chain of conversion factors with cancelling units
5.00km 0 factors used
Exact running value: 5
Reported with correct figures: 5.00 km
Goal: reach inches.
What just happened
Nothing yet
Pick a factor on the right. Each one is a fraction equal to one, so the amount never changes. Only the label changes.

Start here

Pick a challenge

Factors that can cancel km

Every factor stored here is an exact definition, so none of them limits the significant figures in your answer.