## Conversion formula

The conversion factor from gallons to teaspoons is 768.00000000052, which means that 1 gallon is equal to 768.00000000052 teaspoons:

1 gal = 768.00000000052 tsp

To convert 638 gallons into teaspoons we have to multiply 638 by the conversion factor in order to get the volume amount from gallons to teaspoons. We can also form a simple proportion to calculate the result:

1 gal → 768.00000000052 tsp

638 gal → V(tsp)

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

V(tsp) = 638 gal × 768.00000000052 tsp

V(tsp) = 489984.00000033 tsp

The final result is:

638 gal → 489984.00000033 tsp

We conclude that 638 gallons is equivalent to 489984.00000033 teaspoons:

638 gallons = 489984.00000033 teaspoons

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 teaspoon is equal to 2.0408829676057E-6 × 638 gallons.

Another way is saying that 638 gallons is equal to 1 ÷ 2.0408829676057E-6 teaspoons.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that six hundred thirty-eight gallons is approximately four hundred eighty-nine thousand nine hundred eighty-four teaspoons:

638 gal ≅ 489984 tsp

An alternative is also that one teaspoon is approximately zero times six hundred thirty-eight gallons.

## Conversion table

### gallons to teaspoons chart

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

gallons (gal) teaspoons (tsp)
639 gallons 490752 teaspoons
640 gallons 491520 teaspoons
641 gallons 492288 teaspoons
642 gallons 493056 teaspoons
643 gallons 493824 teaspoons
644 gallons 494592 teaspoons
645 gallons 495360 teaspoons
646 gallons 496128 teaspoons
647 gallons 496896 teaspoons
648 gallons 497664 teaspoons