This converter turns US gallons into teaspoons instantly, using the exact factor 1 US gallon = 768 teaspoons. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
Exactly 231 cubic inches — the US liquid gallon used for fuel and milk. The smallest standard kitchen measure, 4.93 millilitres.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
US gallons- The amount you are converting, measured in US gallons
768- The exact number of teaspoons in one US gallon
teaspoons- The converted result
How it works, step by step
- Enter the number of US gallons you want to convert.
- The value is multiplied by 768, the exact conversion factor.
- The result is displayed in teaspoons, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 US gallons
Multiply 5 by 768. That gives 3,840 teaspoons. A quick sanity check: one US gallon is larger than one teaspoon, so the number should get bigger — and it does.
Converting 72 US gallons
72 × 768 = 55,296 teaspoons. Working backwards, 55,296 ÷ 768 returns 72 US gallons, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many teaspoons are in one US gallon?
Exactly 768. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert US gallons to teaspoons?
Teaspoons = US gallons × 768. To reverse it, divide instead: US gallons = teaspoons ÷ 768, which is the same as multiplying by 0.001302083333.
Is the US gallon bigger than the teaspoon?
Yes. One US gallon equals 768 teaspoons, so it is the larger unit.
Why does my answer differ slightly from other us-gallons to teaspoons converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a US gallon?
Exactly 231 cubic inches — the US liquid gallon used for fuel and milk.
What is a teaspoon?
The smallest standard kitchen measure, 4.93 millilitres.
Us Gallons to teaspoons reference table
| Us Gallons | Teaspoons |
|---|---|
| 0.5 gal | 384 tsp |
| 1 gal | 768 tsp |
| 2 gal | 1,536 tsp |
| 3 gal | 2,304 tsp |
| 5 gal | 3,840 tsp |
| 10 gal | 7,680 tsp |
| 15 gal | 11,520 tsp |
| 20 gal | 15,360 tsp |
| 25 gal | 19,200 tsp |
| 50 gal | 38,400 tsp |
| 75 gal | 57,600 tsp |
| 100 gal | 76,800 tsp |
| 250 gal | 192,000 tsp |
| 500 gal | 384,000 tsp |
| 1000 gal | 768,000 tsp |
Exact factor: 1 US gallon = 768 teaspoons. Values rounded for display.