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How many M&M's does it take to fuel a 5 km run?

About 88 M&M'sA 5 km run burns about 350 kcal, and one M&M has 4 kcal.

It takes about 88 M&M's.

How we worked it out

A 5 km run burns about 350 kcal, and one M&M has 4 kcal. A 70 kg runner burns about 70 kcal per km. Calories from nutrition labels. Real life adds a little friction and waste, so treat the number as a solid ballpark rather than a lab result. The constants behind every experiment are on the science page.

Watch it happen

This was one of the five experiments in It Took #11. In the game you guess first, then the experiment plays out with your number: too few and it fails, too many and it overshoots.

Play It Took #11Play today’s experiments

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