Conversion formula

The conversion factor from teaspoons to gallons is 0.0013020833333325, which means that 1 teaspoon is equal to 0.0013020833333325 gallons:

1 tsp = 0.0013020833333325 gal

To convert 664.4 teaspoons into gallons we have to multiply 664.4 by the conversion factor in order to get the volume amount from teaspoons to gallons. We can also form a simple proportion to calculate the result:

1 tsp → 0.0013020833333325 gal

664.4 tsp → V_(gal)

Solve the above proportion to obtain the volume V in gallons:

V_(gal) = 664.4 tsp × 0.0013020833333325 gal

V_(gal) = 0.86510416666608 gal

The final result is:

664.4 tsp → 0.86510416666608 gal

We conclude that 664.4 teaspoons is equivalent to 0.86510416666608 gallons:

664.4 teaspoons = 0.86510416666608 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 1.1559301625535 × 664.4 teaspoons.

Another way is saying that 664.4 teaspoons is equal to 1 ÷ 1.1559301625535 gallons.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that six hundred sixty-four point four teaspoons is approximately zero point eight six five gallons:

664.4 tsp ≅ 0.865 gal

An alternative is also that one gallon is approximately one point one five six times six hundred sixty-four point four teaspoons.

Conversion table

teaspoons to gallons chart

For quick reference purposes, below is the conversion table you can use to convert from teaspoons to gallons