405 US customary teaspoons in US pints
Result
The conversion result is: 405 US customary teaspoons is equivalent to 4.21875 US pints.[1]
Conversion formula
How to convert 405 US customary teaspoons to US pints?
We know (by definition) that: 1 usteaspoon ≈ 0.0104166666666667 uspint.
We can set up a proportion to solve for the number of US pints.
1 usteaspoon / 405 usteaspoon ≈ 0.0104166666666667 uspint / x uspint
Now, we cross multiply to solve for our unknown x:
x uspint ≈ (405 usteaspoon / 1 usteaspoon) * 0.0104166666666667 uspint → x uspint ≈ 4.218750000000014 uspint
Conclusion:
405 usteaspoon ≈ 4.218750000000014 uspint

Conversion in the opposite direction
The inverse of the conversion factor is that 1 US pint is equal to 0.237037037037037 times 405 US customary teaspoons.
It can also be expressed as: 405 US customary teaspoons is equal to 1 / 0.237037037037037 US pints.
Approximation
An approximate numerical result would be: four hundred and five US customary teaspoons is about four point two one US pints, or alternatively, a US pint is about zero point two four times four hundred and five 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.