Volume Converter
Convert between metric, UK imperial and US cooking units — including the all-important difference between a UK pint and a US pint.
VOLUME CONVERTER
Metric
🇬🇧 UK Imperial
🇺🇸 US & Cooking
Enter a volume to see a real-world comparison
Common volumes — click to load
Step-by-step solution
Type a volume to see the conversion working
🍺 UK pint ≠ 🍺 US pint
A US pint is about 83% of a UK pint — that's why American beer servings feel smaller! The same difference applies to gallons: UK = 4,546 ml · US = 3,785 ml.
📐 1 ml = 1 cm³
One millilitre of liquid occupies exactly one cubic centimetre of space. This is a fundamental fact in secondary school science — you'll see both units used in chemistry and biology. 1 litre = 1,000 cm³ = 1,000 ml.
Key conversion facts
Real-world volumes
Volume Converter Explained
Core concepts, classroom applications, and plain-English explanations for all audiences.
When would you actually use this?
Every time you cook from an American recipe. A US recipe calling for "1 cup of flour" means 237 ml — not a UK teacup. Petrol is sold in litres in the UK but gallons in the US, and engine sizes (a "1.6 litre" engine) use this same unit. Volume conversion comes up constantly in real life.
Worked example
"An American recipe needs 2 cups of milk. How many ml is that?"
Step 1: 1 US cup = 236.6 ml
Step 2: 2 cups × 236.6 = 473 ml
Result: 473 ml (roughly 1 UK pint)
Handy shortcut: 1 US cup ≈ 240 ml for quick mental maths.
The UK vs US pint trap
- → UK pint = 568 ml — this is what a pub glass contains
- → US pint = 473 ml — American beer servings feel smaller for this reason
- → Same goes for gallons: UK gallon = 4,546 ml; US gallon = 3,785 ml — always specify which
Science essential: 1 ml = 1 cm³
One millilitre of liquid fills exactly one cubic centimetre of space. This appears constantly in secondary school chemistry and biology — both units mean the same thing, so you can switch between them freely.
Understanding Volume and Why Conversion Matters
Volume is the amount of three-dimensional space an object or substance occupies. Whether you're measuring ingredients for a recipe, calculating the capacity of a container, or working through a GCSE Science problem, understanding volume and how to convert between different units is incredibly useful.
Our Volume Converter helps you quickly switch between common units like millilitres (ml), litres, cubic metres (m³), and even traditional units like pints and gallons. It's especially handy for home cooks tackling international recipes, students needing to convert units for science experiments, or anyone curious about how much liquid a container holds. Remember, a key point for GCSE Science is that 1 millilitre (ml) is exactly equal to 1 cubic centimetre (cm³).
A crucial detail to watch out for is the difference between UK and US measurements. For example, a UK pint (568ml) is not the same as a US pint (473ml), and the same goes for gallons. Our converter takes these differences into account, ensuring you get accurate results every time.
Common mistakes to avoid
- Assuming a 'pint' or 'gallon' is always the same volume:The UK and US use different definitions for pints and gallons. A UK pint is larger than a US pint, and a UK gallon is larger than a US gallon. Always specify whether you mean a UK pint/gallon or a US pint/gallon, especially when following recipes or discussing quantities internationally.
- Forgetting the relationship between millilitres and cubic centimetres:In science, particularly at GCSE level, volume is often measured in cm³. It's easy to forget that these units are directly interchangeable. Remember that 1 ml = 1 cm³. This equivalence is fundamental for calculations involving density or displacement.
- Confusing fluid ounces with weight ounces:Fluid ounces measure volume (how much space a liquid takes up), while weight ounces measure mass (how heavy something is). They are completely different types of measurement. Always check if 'ounces' refers to 'fluid ounces' (fl oz) for liquids or 'ounces' (oz) for dry ingredients or weight. Our converter deals only with fluid ounces.
- Assuming a 'cup' measurement is universal:While common in recipes, the volume of a 'cup' can vary significantly. A US customary cup is different from a UK metric cup, and even other countries have their own standards. When using 'cups' in recipes, try to determine the origin of the recipe (e.g., US, UK, Australian) and use the appropriate cup size, or convert to metric units like ml for precision.