Volume Converter
Convert liters, milliliters, US and UK gallons, quarts, pints, cups, fluid ounces, tablespoons, teaspoons, cubic inches, feet and yards, and barrels.
· CalcFlow Editorial
1 gal = 3.7854118 L
Results shown are estimates for informational purposes only. Nothing on CalcFlow is financial, tax, legal, or medical advice. Always consult a qualified professional before making important decisions.
Common Volume Conversions
| Gallons (US) | Liters | Milliliters | Cubic meters | Teaspoons (US) | Tablespoons (US) |
|---|---|---|---|---|---|
| 1 gal | 3.7854118 | 3,785.4118 | 0.0037854118 | 768 | 256 |
| 2 gal | 7.5708236 | 7,570.8236 | 0.0075708236 | 1,536 | 512 |
| 5 gal | 18.927059 | 18,927.059 | 0.018927059 | 3,840 | 1,280 |
| 10 gal | 37.854118 | 37,854.118 | 0.037854118 | 7,680 | 2,560 |
| 20 gal | 75.708236 | 75,708.236 | 0.075708236 | 15,360 | 5,120 |
| 50 gal | 189.27059 | 189,270.59 | 0.18927059 | 38,400 | 12,800 |
| 100 gal | 378.54118 | 378,541.18 | 0.37854118 | 76,800 | 25,600 |
| 500 gal | 1,892.7059 | 1,892,705.9 | 1.8927059 | 384,000 | 128,000 |
| 1,000 gal | 3,785.4118 | 3,785,411.8 | 3.7854118 | 768,000 | 256,000 |
Popular Volume Conversions
Formula
cubic meters = value x unit factor (1 US gal = 231 in3 = 0.003785411784 m3 exactly; 1 UK gal = 4.54609 L)Understanding Volume Conversion
Volume units come in two families that share names: US customary (gallon, quart, pint, cup, fluid ounce) and British imperial (the same names with different sizes). The US gallon is defined as exactly 231 cubic inches, or 3.785411784 liters. The imperial gallon is exactly 4.54609 liters, about 20 percent larger. Cooking measures such as teaspoons and tablespoons are derived from the US gallon here.
Tips and Best Practices
- 1A US gallon is about 3.785 liters; an imperial gallon is about 4.546 liters. Check which one a recipe or fuel figure means.
- 2One US cup is about 236.6 mL, though nutrition labels round a cup to 240 mL.
- 3For liquids in cooking, 3 teaspoons make 1 tablespoon and 16 tablespoons make 1 US cup.
Real-World Example
3 US gallons is 3 x 3.785411784 = 11.356 liters. A 2 liter bottle holds 2 / 0.2365882365 = 8.45 US cups.
Common Mistakes to Avoid
- Using US gallons for a UK recipe or car fuel figure, which can be off by about 20 percent.
- Assuming a fluid ounce and an ounce of weight are the same; they measure different things.
- Mixing the US pint (473 mL) with the imperial pint (568 mL).
How to Use
- Pick the unit you have in the left selector and the unit you want in the right selector.
- Type a number in either box; the other box updates instantly.
- Use the swap button to reverse the direction and Copy result to copy the answer.
Frequently Asked Questions
How many liters are in a US gallon?
How many milliliters are in a cup?
Is a UK gallon the same as a US gallon?
Sources: NIST Handbook 44 Appendix B (US gallon = 231 cubic inches; tablespoon, teaspoon, cup, pint, quart); UK Weights and Measures Act (imperial gallon = 4.54609 L); 42-gallon petroleum barrel.