1 tbsp = 0.00390625 gal
1 tablespoon equals 0.00390625 US gallons. To convert tablespoons to US gallons, multiply the tablespoon value by 0.00390625. For quick reference: 1 tbsp = 0.00390625 gal, 5 tbsp = 0.0195313 gal, 10 tbsp = 0.0390625 gal, 100 tbsp = 0.390625 gal.
US gallons = Tablespoons × 0.00390625Start with your value in tablespoons.
Multiply the tablespoon value by 0.00390625. This is the exact conversion factor from tablespoons to US gallons.
The product is your value in US gallons. For example, 5 tbsp × 0.00390625 = 0.0195313 gal.
The exact factor from tablespoons to US gallons is 0.00390625.
US gallons = Tablespoons × 0.00390625
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Tablespoons (tbsp) | US gallons (gal) |
|---|---|
| 0.1 tbsp | 0.00039063 gal |
| 0.25 tbsp | 0.00097656 gal |
| 0.5 tbsp | 0.0019531 gal |
| 1 tbsp | 0.0039063 gal |
| 1.5 tbsp | 0.0058594 gal |
| 2 tbsp | 0.0078125 gal |
| 2.5 tbsp | 0.0097656 gal |
| 3 tbsp | 0.011719 gal |
| 4 tbsp | 0.015625 gal |
| 5 tbsp | 0.019531 gal |
| 6 tbsp | 0.023437 gal |
| 7 tbsp | 0.027344 gal |
| 8 tbsp | 0.03125 gal |
| 9 tbsp | 0.035156 gal |
| 10 tbsp | 0.039063 gal |
| 12 tbsp | 0.046875 gal |
| 15 tbsp | 0.058594 gal |
| 20 tbsp | 0.078125 gal |
| 25 tbsp | 0.097656 gal |
| 30 tbsp | 0.11719 gal |
| 40 tbsp | 0.15625 gal |
| 50 tbsp | 0.19531 gal |
| 60 tbsp | 0.23438 gal |
| 75 tbsp | 0.29297 gal |
| 100 tbsp | 0.39063 gal |
| 125 tbsp | 0.48828 gal |
| 150 tbsp | 0.58594 gal |
| 200 tbsp | 0.78125 gal |
| 250 tbsp | 0.97656 gal |
| 300 tbsp | 1.1719 gal |
| 400 tbsp | 1.5625 gal |
| 500 tbsp | 1.9531 gal |
| 600 tbsp | 2.3438 gal |
| 750 tbsp | 2.9297 gal |
| 1000 tbsp | 3.9063 gal |
| 1500 tbsp | 5.8594 gal |
| 2000 tbsp | 7.8125 gal |
| 2500 tbsp | 9.7656 gal |
| 3000 tbsp | 11.719 gal |
| 4000 tbsp | 15.625 gal |
| 5000 tbsp | 19.531 gal |
| 7500 tbsp | 29.297 gal |
| 10000 tbsp | 39.063 gal |
| 15000 tbsp | 58.594 gal |
| 20000 tbsp | 78.125 gal |
| 25000 tbsp | 97.656 gal |
| 30000 tbsp | 117.19 gal |
| 40000 tbsp | 156.25 gal |
| 50000 tbsp | 195.31 gal |
| 100000 tbsp | 390.63 gal |
A US tablespoon of olive oil is about 14 mL. Nutrition labels typically use 1 tbsp = 15 mL.
The US tablespoon equals 1/2 US fluid ounce, or 14.7868 mL — exactly 3 US teaspoons. The UK tablespoon is 17.7582 mL (5/8 imperial fl oz), the Australian metric tablespoon is 20 mL, and most other metric countries use 15 mL. Always check the source's convention before scaling a recipe.
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.