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 309 teaspoons into gallons we have to multiply 309 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

309 tsp → V_(gal)

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

V_(gal) = 309 tsp × 0.0013020833333325 gal

V_(gal) = 0.40234374999973 gal

The final result is:

309 tsp → 0.40234374999973 gal

We conclude that 309 teaspoons is equivalent to 0.40234374999973 gallons:

309 teaspoons = 0.40234374999973 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 2.4854368932056 × 309 teaspoons.

Another way is saying that 309 teaspoons is equal to 1 ÷ 2.4854368932056 gallons.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that three hundred nine teaspoons is approximately zero point four zero two gallons:

309 tsp ≅ 0.402 gal

An alternative is also that one gallon is approximately two point four eight five times three hundred nine 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