Teaspoons to Gallons Converter
Enter the volume in teaspoons below to convert it to gallons.
Convert Teaspoons (US) to Gallons (US)
Enter a value in teaspoons (us) (tsp) to convert to gallons (us) (gal (US)).
Teaspoon to Gallon Conversion Table
Table showing various teaspoon measurements converted to gallons. Click any preset value or arrow to load it into the converter.
| Teaspoons (US) (tsp) | Gallons (US) (gal (US)) |
|---|---|
| 1 tsp | 0.0013021 gal (US) |
| 2 tsp | 0.0026042 gal (US) |
| 2.5 tsp | 0.0032552 gal (US) |
| 5 tsp | 0.0065104 gal (US) |
| 10 tsp | 0.0130208 gal (US) |
| 15 tsp | 0.0195313 gal (US) |
| 20 tsp | 0.0260417 gal (US) |
| 25 tsp | 0.0325521 gal (US) |
| 30 tsp | 0.0390625 gal (US) |
| 50 tsp | 0.0651042 gal (US) |
How to Convert Teaspoons to Gallons
To convert teaspoons to gallons, multiply the volume by the following conversion ratio: 0.0013021 gallons/teaspoon.
Since one teaspoon is equal to 0.0013021 gallons, you can use this simple formula to convert:
The volume in gallons is equal to the volume in teaspoons multiplied by 0.0013021.
For example, here's how to convert 5 teaspoons to gallons using the formula above.
How Many Gallons Are in a Teaspoon?
There are 0.0013021 gallons in a teaspoon, which is why we use this value in the formula above.
Our teaspoon to gallon calculator automatically converts your volume measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Teaspoons and gallons are both units used to measure volume. Keep reading to learn more about each unit.
What Is a Teaspoon?
A teaspoon is a unit of volume equal to 0.0049289 liters (L), the base unit for volume. 1/3 of a US tablespoon (4.9289 mL). [1]
The teaspoon is classified as a US customary unit of volume. Teaspoons can be abbreviated as tsp; for example, 1 teaspoon can be written as 1 tsp.
When working with teaspoons (tsp) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, teaspoons (tsp) are widely used across fine-tolerance laboratory, analytical, and micro-scale volume measurements within US customary workflows, engineering documentation, and technical data sheets.
What Is a Gallon?
A gallon is a unit of volume equal to 3.7854118 liters (L), the base unit for volume. US liquid gallon defined as exactly 231 cubic inches (3.78541 L). [2]
The gallon is classified as a US customary unit of volume. Gallons can be abbreviated as gal (US); for example, 1 gallon can be written as 1 gal (US).
When working with gallons (gal (US)) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, gallons (gal (US)) are widely used across standard volume applications within US customary workflows, engineering documentation, and technical data sheets.
When converting volume between teaspoons (tsp) and gallons (gal (US)), keep full floating-point precision (1 tsp = 0.0013021 gal (US); 1 gal (US) = 768 tsp) during intermediate calculations and round only the final gallon figure to match your instrument tolerance.
More Teaspoon & Gallon Conversions
Need to calculate in the opposite direction? Use our gallons (us) to teaspoons (us) calculator to switch your starting unit immediately. You can also explore related tools such as converting gallons (us) to teaspoons (us), converting liters to gallons (us), or converting quarts (us) to gallons (us).
Convert from Teaspoons
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Volume)·Volume & Liquid Metrology Standard — Teaspoons (US) (tsp) to Gallons (US) (gal (US))
- [2]NIST HB 44 SpecificationNIST HB 44 (Liquid & Dry Capacity Tables)·Unit Specifications: Teaspoon (US) (tsp) & Gallon (US Liquid) (gal (US))
- [3]NIST SP 811 ReferenceNIST SP 811 (NIST SP 811 App. B.9)·Conversion Factors & Mathematical Basis (tsp to gal (US))