Volume Converter
Convert cups, spoons, fluid ounces, gallons, liters and milliliters — US and UK.
Converted to every unit
About this volume converter
Recipes, fuel economy, aquariums and drink labels all mix US customary and metric volume units — and US and UK pints and gallons are not the same size. This converter handles kitchen measures (teaspoons, tablespoons, cups), larger liquid measures (pints, quarts, gallons) and metric and cubic units.
All US units here are US customary liquid measures. UK (imperial) pints and gallons are listed separately because they are about 20% larger.
How to use the Volume Converter
- Type the value you want to convert.
- Choose the unit you're converting from and the unit you want.
- Read the result — the table below shows the value in every other unit.
- Use Swap to reverse the conversion.
Conversion factors
1 US cup = 236.588 mL · 1 US gal = 3.78541 L · 1 tbsp = 3 tsp
Liters are the base. A US gallon is exactly 231 cubic inches (3.785411784 L); a US cup is 8 US fluid ounces (236.588 mL); a tablespoon is 3 teaspoons; an imperial gallon is exactly 4.54609 L.
Worked example
1 US cup is 236.59 mL, 16 tablespoons or 48 teaspoons. A 2-liter bottle holds about 0.528 US gallons or 67.6 US fluid ounces.
Common conversions
| Cup (US) → Milliliter | 1 cup = 236.588236 mL | 5 cup = 1,182.9412 mL | 10 cup = 2,365.8824 mL |
|---|---|---|---|
| Fluid ounce (US) → Milliliter | 1 fl oz = 29.57353 mL | 5 fl oz = 147.867648 mL | 10 fl oz = 295.735296 mL |
| Gallon (US) → Liter | 1 gal = 3.785412 L | 5 gal = 18.927059 L | 10 gal = 37.854118 L |
| Liter → Gallon (US) | 1 L = 0.264172 gal | 5 L = 1.32086 gal | 10 L = 2.641721 gal |
| Tablespoon (US) → Teaspoon (US) | 1 tbsp = 3 tsp | 5 tbsp = 15 tsp | 10 tbsp = 30 tsp |
| Quart (US) → Liter | 1 qt = 0.946353 L | 5 qt = 4.731765 L | 10 qt = 9.463529 L |
Tips for better results
- For baking, weigh dry ingredients when you can — a cup of flour can vary by 20% depending on how it's scooped.
- Check whether a recipe is from the US, UK or Australia; their cups and tablespoons differ slightly.
Frequently asked questions
How many mL are in a cup?
A US cup is about 236.6 mL. Many nutrition labels round it to 240 mL.
How many cups are in a gallon?
16 US cups.
Is a UK gallon bigger than a US gallon?
Yes — 4.546 liters versus 3.785 liters.
Last reviewed: October 2026 · Results are calculated in your browser.
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