The teaspoon
The US teaspoon equals 1/3 of a US tablespoon, or about 4.929 mL. The metric teaspoon (used on most non-US nutrition labels) is exactly 5 mL — close enough that you can substitute freely in cooking but not in precise dosing.
Teaspoons to US gallons Converter
1 tsp = 0.00130208 gal
1 teaspoon equals 0.00130208 US gallons. To convert teaspoons to US gallons, multiply the teaspoon value by 0.00130208. For quick reference: 1 tsp = 0.00130208 gal, 5 tsp = 0.00651042 gal, 10 tsp = 0.0130208 gal, 100 tsp = 0.130208 gal.
Formula
US gallons = Teaspoons × 0.00130208Quick
How to convert teaspoons to US gallons
Take your value
Start with your value in teaspoons.
Multiply by 0.00130208
Multiply the teaspoon value by 0.00130208. This is the exact conversion factor from teaspoons to US gallons.
Read the result
The product is your value in US gallons. For example, 5 tsp × 0.00130208 = 0.00651042 gal.
Conversion formula
The exact factor from teaspoons to US gallons is 0.00130208.
US gallons = Teaspoons × 0.00130208
Teaspoons to US gallons conversion table
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Teaspoons (tsp) | US gallons (gal) |
|---|---|
| 0.1 tsp | 0.00013021 gal |
| 0.25 tsp | 0.00032552 gal |
| 0.5 tsp | 0.00065104 gal |
| 1 tsp | 0.0013021 gal |
| 1.5 tsp | 0.0019531 gal |
| 2 tsp | 0.0026042 gal |
| 2.5 tsp | 0.0032552 gal |
| 3 tsp | 0.0039063 gal |
| 4 tsp | 0.0052083 gal |
| 5 tsp | 0.0065104 gal |
| 6 tsp | 0.0078125 gal |
| 7 tsp | 0.0091146 gal |
| 8 tsp | 0.010417 gal |
| 9 tsp | 0.011719 gal |
| 10 tsp | 0.013021 gal |
| 12 tsp | 0.015625 gal |
| 15 tsp | 0.019531 gal |
| 20 tsp | 0.026042 gal |
| 25 tsp | 0.032552 gal |
| 30 tsp | 0.039063 gal |
| 40 tsp | 0.052083 gal |
| 50 tsp | 0.065104 gal |
| 60 tsp | 0.078125 gal |
| 75 tsp | 0.097656 gal |
| 100 tsp | 0.13021 gal |
| 125 tsp | 0.16276 gal |
| 150 tsp | 0.19531 gal |
| 200 tsp | 0.26042 gal |
| 250 tsp | 0.32552 gal |
| 300 tsp | 0.39063 gal |
| 400 tsp | 0.52083 gal |
| 500 tsp | 0.65104 gal |
| 600 tsp | 0.78125 gal |
| 750 tsp | 0.97656 gal |
| 1000 tsp | 1.3021 gal |
| 1500 tsp | 1.9531 gal |
| 2000 tsp | 2.6042 gal |
| 2500 tsp | 3.2552 gal |
| 3000 tsp | 3.9063 gal |
| 4000 tsp | 5.2083 gal |
| 5000 tsp | 6.5104 gal |
| 7500 tsp | 9.7656 gal |
| 10000 tsp | 13.021 gal |
| 15000 tsp | 19.531 gal |
| 20000 tsp | 26.042 gal |
| 25000 tsp | 32.552 gal |
| 30000 tsp | 39.063 gal |
| 40000 tsp | 52.083 gal |
| 50000 tsp | 65.104 gal |
| 100000 tsp | 130.21 gal |
Real-world reference
A standard pinch of salt is about 1/8 tsp. Most spice measurements in recipes are in teaspoons.
Frequently asked questions
- How many US gallons are in 1 teaspoon?
- 1 teaspoon equals 0.00130208 US gallons.
- How do I convert teaspoons to US gallons?
- Multiply the teaspoon value by 0.00130208. So x tsp × 0.00130208 = the equivalent in gal.
- What is 5 teaspoons in US gallons?
- 5 teaspoons equals 0.00651042 US gallons.
- What is 10 teaspoons in US gallons?
- 10 teaspoons equals 0.0130208 US gallons.
- What is 100 teaspoons in US gallons?
- 100 teaspoons equals 0.130208 US gallons.
- How do I convert back from US gallons to teaspoons?
- Multiply the US gallon value by 768. For example, 1 gal = 768 tsp.
- Is the teaspoon bigger than the US gallon?
- No. 1 teaspoon is smaller than 1 US gallon. It takes 768 teaspoons to equal 1 US gallon.
- Are these conversion factors exact?
- Yes. The factor of 0.00130208 is derived directly from the SI definitions of teaspoon and US gallon.
About the teaspoon and the US gallon
The US gallon
The US liquid gallon equals exactly 3.785411784 liters, defined as 231 cubic inches. It is the standard fuel and milk unit in the United States. The US gallon is about 16.7% smaller than the UK (imperial) gallon (4.54609 L), so quoting fuel economy as 'mpg' without specifying the gallon can mislead by a wide margin.