420 US customary teaspoons in metric teaspoons

Conversion formula
How to convert 420 US customary teaspoons to metric teaspoons?

We know (by definition) that: $1\mathrm{usteaspoon}\approx 0.98578431875\mathrm{brteaspoon}$

We can set up a proportion to solve for the number of metric teaspoons.

Now, we cross multiply to solve for our unknown $x$:

Conclusion: 420 ⁢ usteaspoon ≈ 414.02941387500005 ⁢ brteaspoon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 metric teaspoon is equal to 0.00241528733584593 times 420 US customary teaspoons.

It can also be expressed as: 420 US customary teaspoons is equal to $\frac{1}{\mathrm{0.00241528733584593}}$ metric teaspoons.

Approximation

An approximate numerical result would be: four hundred and twenty US customary teaspoons is about four hundred and fourteen point zero two metric teaspoons, or alternatively, a metric teaspoon is about zero times four hundred and twenty US customary teaspoons.