640 metric teaspoons in US customary cups

Result

The conversion result is: 640 metric teaspoons is equivalent to 13.5256090807372 US customary cups.[1]

Conversion formula
How to convert 640 metric teaspoons to US customary cups?

We know (by definition) that: 1 brteaspoon ≈ 0.0211337641886519 uscup.

We can set up a proportion to solve for the number of US customary cups.

1 brteaspoon / 640 brteaspoon ≈ 0.0211337641886519 uscup / x uscup

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

x uscup ≈ (640 brteaspoon / 1 brteaspoon) * 0.0211337641886519 uscup → x uscup ≈ 13.525609080737215 uscup

Conclusion:

640 brteaspoon ≈ 13.525609080737215 uscup

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US customary cup is equal to 0.07393382390625 times 640 metric teaspoons.

It can also be expressed as: 640 metric teaspoons is equal to 1 / 0.07393382390625 US customary cups.

Approximation

An approximate numerical result would be: six hundred and forty metric teaspoons is about thirteen point five two US customary cups, or alternatively, a US customary cup is about zero point zero seven times six hundred and forty metric teaspoons.

Footnotes

[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).

Results may contain small errors due to the use of floating point arithmetic.