Teaspoons to Gallons
An instant teaspoons-to-gallons converter, with the formula and a reference table below.
| Teaspoons | Gallons |
|---|---|
| 1 tsp | 0.001302 gal |
| 2 tsp | 0.002604 gal |
| 3 tsp | 0.003906 gal |
| 5 tsp | 0.00651 gal |
| 10 tsp | 0.013021 gal |
| 25 tsp | 0.032552 gal |
| 50 tsp | 0.065104 gal |
| 100 tsp | 0.130208 gal |
How to use
- Enter a value in the Teaspoons field.
- The Gallons figure appears immediately — no button to press.
- Typing in the Gallons field converts back to Teaspoons the same way.
- Use the reference table for the values that come up most often.
Teaspoons to Gallons formula
The factor from teaspoons to gallons is 0.00130208333.
gal = tsp × 0.00130208333
Put another way, one teaspoon is exactly 1/768 of a gallon.
Why this factor: the teaspoon and the gallon are both defined against the liter, so dividing one definition by the other gives 0.00130208333 directly. Both definitions are set out in full below.
To go the other way, divide by 0.00130208333 — or use the Gallons to Teaspoons converter, which is the same calculation reversed.
Worked example
Start with 8 tsp. Multiply by 0.00130208333 to get 0.010417 gal.
8 tsp × 0.00130208333 = 0.010417 gal
The converter above does this for any value you type, in either direction.
What is a teaspoon?
A US teaspoon is the smallest common cooking measure, one third of a tablespoon.
Definition: Exactly one sixth of a US fluid ounce, so about 4.9289 milliliters — conventionally rounded to 5 mL.
Where it is used: Recipes, spice and leavening quantities, and liquid medicine doses.
What is a gallon?
A US liquid gallon is the standard large-volume unit in the United States.
Definition: Defined as exactly 231 cubic inches, which works out to exactly 3.785411784 liters.
Where it is used: Fuel sales, milk and beverage containers, and paint in the US.
Worth knowing: The imperial gallon used in the UK and Canada is about 20% larger, at 4.54609 L — so 'miles per gallon' figures are not comparable between the two.
Teaspoons vs Gallons
The teaspoon and the gallon belong to the same family of units, so converting between them is usually a matter of shifting a decimal point or applying a small whole-number factor.
Frequently asked questions
How many gallons are in a teaspoon?
One teaspoon equals 0.00130208333 gallons.
What is the formula to convert teaspoons to gallons?
Multiply the number of teaspoons by 0.00130208333. To reverse it, divide by 0.00130208333 instead.
How do I convert gallons back to teaspoons?
Divide by 0.00130208333, which is the same as multiplying by 768.
How many gallons are in 10 teaspoons?
10 tsp works out to 0.013021 gal.
Is there anything to watch out for with gallons?
The imperial gallon used in the UK and Canada is about 20% larger, at 4.54609 L — so 'miles per gallon' figures are not comparable between the two.
How is the teaspoon defined?
Exactly one sixth of a US fluid ounce, so about 4.9289 milliliters — conventionally rounded to 5 mL.