Cooking Volume Converter

Convert between UK and US cooking volume units including cups, tablespoons, teaspoons, fluid ounces, and millilitres, with recipe-context notes.

Recipe volume

Convert cooking volume measurements

Compare millilitres with US cups, spoons, and fluid ounces, then check the metric or UK-imperial equivalents that often appear in older or regional recipes.

Volume From unit

Recipe note US and metric cooking measures are not identical. A US tablespoon is about 14.79 ml, while the modern metric tablespoon used in many UK and Commonwealth recipes is 15 ml. US and UK fluid ounces also differ.

Result

Enter a cooking volume Provide a non-negative recipe volume above to compare millilitres, cups, spoons, and fluid ounces.

Also in Volume & Capacity

Volume Converter

Recipe Volume

Cooking volume converter: US cups, metric spoons, fluid ounces, and millilitres explained

A cooking volume converter helps when a recipe keeps the ingredient amount fixed but the measuring system changes. Modern recipes can mix millilitres with US cups and spoons, while older or regional instructions may still mention metric cups or UK-imperial fluid ounces. A dedicated converter keeps those systems visible side by side.

About this calculator

Reviewed March 2026

Methodology

The converter uses millilitres as the shared base, applies NIST customary relationships for US recipe measures, and shows metric-first spoon and cup standards separately from UK-imperial fluid-ounce values.

Limitations

This tool converts unit labels only and does not account for ingredient density, packing, or recipe-specific measuring conventions.
Metric cup and spoon usage varies by cookbook and region, so the source recipe’s own notation should still control when it is explicit.

Disclaimer

This converter is for educational and kitchen-planning use. For critical production or commercial food work, follow the source recipe, product specification, or regulated measuring standard in force for that workflow.

Sources

NIST Guide to the SI — Appendix B.9 — NIST reference covering common non-SI volume relationships used in US customary cooking measures.
GOV.UK — Weights, measures and packaging — UK government overview confirming the modern metric-first legal context for weights and measures.

See our calculation methodology and editorial standards for how this estimate is produced.

Why recipe volume units are easy to mix up

Cooking measures often reuse the same names across different systems even when the actual volume is not identical. A tablespoon in a US recipe is not exactly the same as the modern metric tablespoon used in many UK and Commonwealth recipes, and a US fluid ounce is not the same as an imperial fluid ounce.

That is why a cooking-volume converter needs to be explicit about which family each unit belongs to. The safe workflow is not to assume that every spoon, cup, or fluid-ounce label means the same thing, but to keep the US and metric-first relationships visible together.

The unit relationships used here

The live tool converts everything through millilitres. For US measures it uses the customary relationships published by NIST: 1 US teaspoon is about 4.9289 ml, 1 US tablespoon is about 14.7868 ml, 1 US fluid ounce is about 29.5735 ml, and 1 US cup is about 236.588 ml.

On the metric-first side, the converter uses the common modern kitchen standards of 5 ml for a metric teaspoon, 15 ml for a metric tablespoon, 250 ml for a metric cup, and 28.4130625 ml for an imperial fluid ounce. That keeps modern recipe notation explicit without implying a single universal "UK cup".

1 US tbsp ≈ 14.7868 ml

US customary tablespoon relationship used in many North American recipes.

1 metric tbsp = 15 ml

Modern metric tablespoon relationship commonly used in UK and Commonwealth kitchen notation.

1 US fl oz ≈ 29.5735 ml; 1 imperial fl oz = 28.4130625 ml

Shows why fluid-ounce labels need system context in recipe work.

How to use the converter safely in recipe planning

If a recipe source is clearly American, start from the US measure shown in the recipe and use the metric outputs for weighing or measuring with metric jugs and spoons. If a recipe is UK-based or metric-first, use the metric spoon or cup option instead of assuming the US relationship.

This matters most for baking, syrups, extracts, and other small-volume ingredients where repeated spoon differences can noticeably change the result. The tool is most useful as a notation translator, not as a substitute for a recipe author’s own system labels.

Frequently asked questions

Is a US tablespoon the same as a metric tablespoon?

No. A US tablespoon is about 14.79 ml, while a modern metric tablespoon is 15 ml. The difference is small, but it can add up in baking or in recipes with repeated spoon measures.

Is there one standard UK cup?

No single modern legal "UK cup" standard dominates the way the US cup does. Metric-first recipes often use a 250 ml metric cup, while older imperial-style references may use different conventions. This tool labels the metric cup explicitly rather than implying a universal UK cup.

Why do US and UK fluid ounces differ?

They come from different historical customary systems. A US fluid ounce is about 29.57 ml, while an imperial fluid ounce is about 28.41 ml, so the same label does not always mean the same volume.

Should I convert recipe volume or weigh ingredients instead?

For the highest accuracy, especially in baking, weighing ingredients is usually better because density differs from ingredient to ingredient. Volume conversion is still useful when the recipe itself is written in cups, spoons, or fluid ounces.

More from nearby categories

These related calculators come from the same leaf category, nearby sibling categories, or the same top-level topic.

Volume Converter

Convert volume between millilitres, litres, cubic metres, US and UK fluid ounces, cups, pints, quarts, gallons, and cubic inches and feet, with all units shown at once.

Open calculator

Large Distance Converter

Convert long distances between km, mi, nmi, and m for travel, transport, aviation, and mapping contexts with unit context notes.

Open calculator

Weight Converter

Convert weight or mass between milligrams, grams, kilograms, metric tonnes, ounces, pounds, stone, short tons, and long tons, with all equivalents shown at once including the stone-and-pounds composite.

Open calculator

Area Converter

Convert area between square millimetres, centimetres, metres, hectares, square kilometres, square inches, square feet, square yards, acres, and square miles, with all equivalents shown at once.

Open calculator