4 US customary teaspoons in metric teaspoons

Conversion formula
How to convert 4 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: 4 ⁢ usteaspoon ≈ 3.943137275 ⁢ brteaspoon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 metric teaspoon is equal to 0.253605170263823 times 4 US customary teaspoons.

It can also be expressed as: 4 US customary teaspoons is equal to $\frac{1}{\mathrm{0.253605170263823}}$ metric teaspoons.

Approximation

An approximate numerical result would be: four US customary teaspoons is about three point nine four metric teaspoons, or alternatively, a metric teaspoon is about zero point two five times four US customary teaspoons.