Convert volume units — liters, gallons, cups, milliliters, cubic meters, barrels and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 gal | 0.768 tsp | |
| 0.01 gal | 7.68 tsp | |
| 0.1 gal | 76.8 tsp | |
| 1 gal | 768 tsp | |
| 5 gal | 3840 tsp | |
| 10 gal | 7680 tsp | |
| 50 gal | 38400 tsp | |
| 100 gal | 76800 tsp | |
| 1000 gal | 768000 tsp |
Common us gallon values converted to teaspoon — factor: 1 gal = 768 tsp
| US Gallon (gal) | Teaspoon (tsp) | Context |
|---|---|---|
| 0.0078 gal | 5.99 tsp | Tablespoon |
| 0.031 gal | 23.81 tsp | Quarter cup |
| 0.0625 gal | 48 tsp | Cup |
| 0.125 gal | 96 tsp | Pint |
| 0.25 gal | 192 tsp | Quart |
| 0.5 gal | 384 tsp | Half gallon |
| 1 gal | 768 tsp | Gallon jug |
| 2 gal | 1,536 tsp | Two gallons |
| 5 gal | 3,840 tsp | Jerrycan |
| 10 gal | 7,680 tsp | 10-gallon drum |
| 20 gal | 1.536e+04 tsp | 20-gallon tank |
| 42 gal | 3.226e+04 tsp | Oil barrel |
| 55 gal | 4.224e+04 tsp | Drum barrel |
| 100 gal | 7.68e+04 tsp | Large drum |
| 1,000 gal | 7.68e+05 tsp | Tank |
Converting us gallon to teaspoon comes up frequently in cooking, chemistry, medicine, and engineering. A recipe written in metric units may need to be adapted for a kitchen using teaspoon, or a laboratory protocol may specify volumes in us gallon that need to be measured with equipment calibrated in teaspoon.
In everyday use, knowing that 5 gal = 3840 tsp and 10 gal = 7680 tsp covers most common situations. For bulk calculations, 100 gal = 7.68e+04 tsp is a useful anchor. The reverse conversion — teaspoon back to us gallon — uses the factor 0.001302, so 1 tsp = 0.001302 gal.
All conversions use the internationally recognized factor of exactly 1 gal = 768 tsp. Calculations are performed in IEEE 754 double-precision floating point, giving accuracy to at least 8 significant figures — more than sufficient for any practical application.
Formula: Teaspoon = US Gallon × 767.99989
Multiply any us gallon value by 767.99989 to get teaspoon. One us gallon equals 767.99989 tsp.
Reverse: US Gallon = Teaspoon × 0.0013020835
US gallons × 768 = teaspoons. One gallon = exactly 768 tsp.
Gallons × 256 = tbsp, then × 3 = tsp.
Teaspoons ÷ 768 = gallons.
Prices fuel in USD per gallon and tracks daily sales volume in thousands of gallons.
Calculates pesticide and fertilizer application rates in gallons per acre.
Measures pool volume in gallons to calculate chlorine and pH chemical dosages.
Purchases engine oil, transmission fluid, and coolant in quart and gallon containers.
Estimates coverage (one US gallon covers about 350 sq ft) and quotes by the gallon.
Specifies water heater tank capacity (40, 50, 80 gallons) for residential systems.
The US liquid gallon is defined as exactly 231 cubic inches, or 3.785411784 liters. It traces its origins to the Queen Anne wine gallon of 1707, which American colonies adopted.
The US gallon differs from the UK Imperial gallon by about 16.5%. This matters for fuel economy: a US MPG figure is lower than the equivalent UK MPG for the same car.
Interesting fact: The United States, Liberia, and Myanmar are the only countries using the US gallon as a primary everyday volume unit.
The US teaspoon is exactly one-third of a tablespoon, 4.92892 mL. It was standardized in the US in the early 20th century partly to address inconsistent home medication dosing.
Teaspoons are the smallest standard cooking measure in the US system, used for spices, leaveners, and flavorings. A medical teaspoon dose conventionally means 5 mL.
Interesting fact: The teaspoon is behind one of science's most cited comparisons: the entire Pacific Ocean would fill roughly 7.1 × 10²³ teaspoons.