Volume Conversion Calculator

From teaspoons to cubic metres in one conversion line

This volume conversion calculator is designed to handle real-world liquid and container questions: turning teaspoons into millilitres, gallons into litres, cups into fluid ounces or cubic feet of tank volume into litres. Instead of juggling multiple charts, you choose your starting unit, choose the target unit and get a clear line like “2.5 gal = 9.464 L”.

1. Choose the units that match how you think

The dropdowns include the units you actually see in recipes, packaging and tank specs:

• Gallons (gal), quarts (qt), pints (pt), cups (c) for U.S.-style cooking, drink mixes and brews.
• Fluid ounces (fl oz), tablespoons (tbsp), teaspoons (tsp) for small recipe amounts and medication dosing cups.
• Cubic inch (in³), cubic foot (ft³), cubic yard (yd³) for boxes, tanks, storage, soil and construction volumes.
• Litres (L), millilitres (mL) for bottles, grocery packaging and metric recipes.
• Cubic centimetre (cm³) and cubic metre (m³) for technical, lab and engineering contexts.

You can mix and match any pair: cups to mL, gallons to litres, cubic feet to litres, pints to cups, teaspoons to tablespoons, or cubic metres to gallons.

2. Base-unit method: everything through litres

Internally, the calculator uses litres as the base unit. Each supported unit has a fixed factor that says how many litres it corresponds to. Some of the key values are:

• 1 gal ≈ 3.785412 L.
• 1 qt ≈ 0.946353 L.
• 1 pt ≈ 0.473176 L.
• 1 c ≈ 0.236588 L.
• 1 fl oz ≈ 0.029574 L.
• 1 tbsp ≈ 0.014787 L.
• 1 tsp ≈ 0.004929 L.
• 1 in³ ≈ 0.016387 L.
• 1 ft³ ≈ 28.316847 L.
• 1 yd³ ≈ 764.554858 L.
• 1 L = 1 L (by definition).
• 1 mL = 0.001 L; 1 cm³ = 0.001 L; 1 m³ = 1,000 L.

When you hit Convert, the tool multiplies your input by the “to litres” factor, then divides by the target unit’s factor. That keeps everything aligned with standard conversion tables.

3. Volume relationships at a glance

This table highlights some of the core volume relationships the calculator uses. It’s useful if you want to sanity-check results or do quick mental estimates while you cook or plan storage.

4. Reading and using the result

The result card is intentionally simple. If you enter 3.5 and convert from cups to millilitres, you’ll see a line like “3.5 c = 828.06 mL”. That is enough to scale recipes, match bottle sizes, plan batch cocktails or estimate how much liquid fits in a storage box or aquarium section.

Because every unit runs through litres with consistent factors, the tool behaves like a clean conversion chart—without you needing to remember all the exact numbers for cups, tablespoons, teaspoons, gallons, cubic feet and cubic metres.

References and further reading on volume units

These resources explain how the main volume units and relationships used here are defined:

• Gallon — covers the U.S. liquid gallon and its relationship to quarts, pints, cups and litres.
• Litre — describes the litre as a non-SI unit accepted for use with the SI and its link to cubic metres.
• Cubic metre — defines the cubic metre and shows its use for larger container volumes and flow calculations.
• Teaspoon — explains typical teaspoon sizes in cooking measurements and their approximate millilitre values.

For critical lab work, regulatory packaging or dosing, always double-check key values against your local standards or official documentation before finalising measurements.