649 US customary teaspoons in US customary cups
Result
The conversion result is: 649 US customary teaspoons is equivalent to 13.5208333333333 US customary cups.[1]
Conversion formula
How to convert 649 US customary teaspoons to US customary cups?
We know (by definition) that: 1 usteaspoon ≈ 0.0208333333333333 uscup.
We can set up a proportion to solve for the number of US customary cups.
1 usteaspoon / 649 usteaspoon ≈ 0.0208333333333333 uscup / x uscup
Now, we cross multiply to solve for our unknown x:
x uscup ≈ (649 usteaspoon / 1 usteaspoon) * 0.0208333333333333 uscup → x uscup ≈ 13.520833333333313 uscup
Conclusion:
649 usteaspoon ≈ 13.520833333333313 uscup

Conversion in the opposite direction
The inverse of the conversion factor is that 1 US customary cup is equal to 0.073959938366718 times 649 US customary teaspoons.
It can also be expressed as: 649 US customary teaspoons is equal to 1 / 0.073959938366718 US customary cups.
Approximation
An approximate numerical result would be: six hundred and forty-nine US customary teaspoons is about thirteen point five one US customary cups, or alternatively, a US customary cup is about zero point zero seven times six hundred and forty-nine US customary 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.