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US Gallons to US Teaspoons (gal to tsp) Converter

1 US gallon (gal) = 768 US teaspoons (tsp). To convert US gallons to US teaspoons, multiply by 768: 15 gal × 768 = 11,520 tsp.

1 gal = 767.9999990262 tsp
Convert the other way: US Teaspoons to US Gallons

Quick facts

How to convert US gallons to US teaspoons

  1. Take the value in US gallons.
  2. Multiply it by 768 (the number of US teaspoons in one US gallon).
  3. Round the result to the precision you need.
tsp = gal × 768

Worked example (a car fuel tank): 15 gal × 768 = 11520 tsp.

To convert US teaspoons back to US gallons, multiply by 0.00130208, or divide by 768.

Source: NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units).

US Gallons to US Teaspoons conversion table

US Gallons to US Teaspoons conversion table
US Gallons [gal]US Teaspoons [tsp]
0.01 gal7.6799999903 tsp
0.1 gal76.7999999026 tsp
1 gal767.9999990262 tsp
2 gal1535.9999980523 tsp
3 gal2303.9999970785 tsp
5 gal3839.9999951308 tsp
10 gal7679.9999902616 tsp
20 gal15359.9999805231 tsp
50 gal38399.9999513078 tsp
100 gal76799.9999026156 tsp
1000 gal767999.999026156 tsp

gal to tsp chart from 1 to 100

US Teaspoons to US Gallons conversion table

US Teaspoons to US Gallons conversion table
US Teaspoons [tsp]US Gallons [gal]
0.01 tsp0.0000130208 gal
0.1 tsp0.0001302083 gal
1 tsp0.0013020833 gal
2 tsp0.0026041667 gal
3 tsp0.00390625 gal
5 tsp0.0065104167 gal
10 tsp0.0130208333 gal
20 tsp0.0260416667 gal
50 tsp0.0651041667 gal
100 tsp0.1302083335 gal
1000 tsp1.302083335 gal

US Gallons vs US Teaspoons

US GallonUS Teaspoon
Symbolgaltsp
Equals1 gal = 768 tsp1 tsp = 0.00130208 gal

What is a US gallon?

A US customary unit equal to 4 quarts. Used in the US for fuel, milk, and paint.

What is a US teaspoon?

A US customary cooking measure equal to 1/3 tablespoon. Used in US recipes for small quantities of ingredients.

Frequently asked questions

How many US teaspoons are in a US gallon?

There are 768 US teaspoons in 1 US gallon (1 gal = 767.9999990262 tsp).

How many US gallons are in a US teaspoon?

There are 0.00130208 US gallons in 1 US teaspoon (1 tsp = 0.0013020833 gal).

How do I convert US gallons to US teaspoons?

Multiply the number of US gallons by 768. For example, 10 gal × 768 = 7,680 tsp. To convert back, multiply by 0.00130208.

What is 10 gal in US teaspoons?

10 gal = 7,680 tsp.

What is 100 gal in US teaspoons?

100 gal = 76,800 tsp.

Is the conversion exact?

Yes. The factor comes from the official definitions of both units (NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units)). Results are shown to up to 10 decimal places; round them to suit your purpose.

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Reviewed by

Dr. Muhammad Amjad Khadim PhD Mathematics

Dr. Muhammad Amjad Khadim holds a PhD in Mathematics. He writes and reviews the guides on pakmath.com and checks every formula, conversion factor and worked example against published standards and official guidance before it goes live. Spotted an error? Tell us and it will be corrected.

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First published 28 October 2026 · Last reviewed 5 November 2026