How to convert 690 US customary cups to metric teaspoons?
We know (by definition) that:
We can set up a proportion to solve for the number of metric teaspoons.
Now, we cross multiply to solve for our unknown :
Conversion in the opposite direction
The inverse of the conversion factor is that 1 metric teaspoon is equal to 3.06286437516694e-05 times 690 US customary cups.
It can also be expressed as: 690 US customary cups is equal to metric teaspoons.
An approximate numerical result would be: six hundred and ninety US customary cups is about thirty-two thousand, six hundred and forty-nine point one eight metric teaspoons, or alternatively, a metric teaspoon is about zero times six hundred and ninety US customary cups.
 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.