Cooking Measurement Handbook: Cups, Tablespoons, Grams, Ounces, and More

11 min read•June 1, 2026•Reviewed: June 1, 2026

✓Reviewed by Apex Conversion Editorial Team · Last reviewed June 1, 2026

Cooking recipes use a patchwork of measurement systems: US customary cups and tablespoons, metric grams and milliliters, imperial fluid ounces, and Fahrenheit or Celsius temperatures. A recipe from a British cookbook, an Australian food blog, or a Japanese cooking site will use different units than a typical American recipe — and even within American recipes, the distinction between volume (cups) and mass (grams) matters enormously for precision baking.

This handbook covers every common cooking measurement unit, explains when to use volume vs. weight, walks through the US customary system and metric system side by side, and provides the conversion factors you need to adapt any recipe to your equipment and location.

Volume Measurements: The US Customary System

The US customary volume system used in cooking is built on the cup as the primary unit. One US cup = 8 fluid ounces = 16 tablespoons = 48 teaspoons = 236.588 mL. The system nests neatly: 3 teaspoons = 1 tablespoon; 4 tablespoons = ¼ cup; 16 tablespoons = 1 cup; 2 cups = 1 pint; 4 cups = 1 quart; 16 cups = 1 gallon.

Fluid ounces (fl oz) measure liquid volume, not weight. One US fluid ounce = 29.574 mL. This is often confused with the weight ounce (oz) — they are completely different measures. A fluid ounce of water happens to weigh almost exactly 1 ounce by mass, which causes the confusion, but an ounce of honey or olive oil will not fill exactly one fluid ounce by volume.

Dry vs. Liquid Measuring Tools

Dry measuring cups are designed to be filled to the rim and leveled. Liquid measuring cups have a pour spout, graduated markings, and are read at eye level. Using the wrong type degrades precision. For dry ingredients: spoon into the cup and level the top with a straight edge — never pack or scoop directly (scooping compresses flour up to 30%, adding unwanted mass). For liquids: fill to the marked line while the cup sits on a flat surface; crouch to eye level to avoid parallax error.

Many professional bakers skip volume measurement for dry ingredients entirely and use a kitchen scale in grams. This is more accurate, more repeatable, and eliminates the dry/liquid ambiguity. One cup of flour can range from 120 g to 160 g depending on measuring technique; 130 g of flour is always 130 g. For baking (as opposed to cooking), grams are the professional standard.

Essential Cooking Volume Conversions

━━━ US Customary ━━━
  3 tsp    = 1 tbsp            16 tbsp   = 1 cup
  2 tbsp   = 1 fl oz           8 fl oz   = 1 cup
  4 tbsp   = ¼ cup             2 cups    = 1 pint
  8 tbsp   = ½ cup             4 cups    = 1 quart
  12 tbsp  = ¾ cup             16 cups   = 1 gallon

━━━ Metric Equivalents ━━━
  1 tsp    = 4.929 mL           1 tbsp    = 14.787 mL
  1 fl oz  = 29.574 mL          1 cup     = 236.588 mL
  1 pint   = 473.176 mL         1 quart   = 946.353 mL
  1 gallon = 3,785.41 mL = 3.785 L

━━━ Common Fraction Cups in mL ━━━
  ⅛ cup = 30 mL    ¼ cup = 59 mL    ⅓ cup = 79 mL
  ½ cup = 118 mL   ⅔ cup = 158 mL   ¾ cup = 177 mL

Weight Measurements: Grams and Ounces

Recipes from the UK, Australia, and Europe predominantly use grams (g) for dry ingredients and milliliters (mL) for liquids. US recipes increasingly include grams alongside cups, particularly in baking. One ounce (weight) = 28.3495 g. One pound = 16 oz = 453.592 g. For most baking purposes, 1 oz ≈ 28 g is a useful mental shorthand.

Common baking weight benchmarks: 1 cup all-purpose flour ≈ 120–130 g (King Arthur standard: 120 g); 1 cup sugar (granulated) ≈ 200 g; 1 cup packed brown sugar ≈ 213 g; 1 cup butter ≈ 227 g (2 sticks US); 1 cup rolled oats ≈ 90 g; 1 cup chocolate chips ≈ 170 g. These vary by brand and technique — a kitchen scale eliminates all variation.

Cooking Temperature Conversions

Oven temperatures in US recipes are given in Fahrenheit (°F); UK, Australian, and European recipes use Celsius (°C). The conversion: °C = (°F − 32) × 5/9. Common oven reference points: 325°F = 163°C (slow/low); 350°F = 177°C (moderate — most US cake and cookie recipes); 375°F = 191°C; 400°F = 204°C; 425°F = 218°C; 450°F = 232°C (high).

Fan-assisted (convection) ovens run hotter and more evenly than conventional ovens. When a recipe calls for a conventional oven, reduce the temperature by 15–20°C (25–35°F) if using fan mode, or reduce baking time by 10–15%. Many modern ovens label fan temperatures directly. Australian recipes often specify 'fan-forced' temperatures, which are already calibrated for fan ovens.

Quick Tips

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Scale is your friend for baking: buy a kitchen scale that reads in grams. It costs less than a set of measuring cups and eliminates the #1 source of baking failure — inconsistent flour measurement.
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¼ cup = 4 tablespoons = 12 teaspoons. Memorizing this fraction chain lets you scale any recipe up or down without a chart.
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A 'pinch' ≈ ⅛ teaspoon; a 'dash' ≈ ⅛ to ¼ teaspoon. These are culinary conventions, not precise measurements.
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US tablespoon (14.79 mL) differs from the Australian tablespoon (20 mL). If a recipe is from an Australian source, 1 tbsp ≠ 3 tsp in US terms — it's closer to 4 US teaspoons.
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When substituting butter (by volume) for oil: use ¾ the volume of butter. 1 cup oil → ¾ cup butter. But by weight: 1 cup oil ≈ 218 g; 1 cup butter ≈ 227 g — closer, but butter is ~80% fat with water and milk solids.

Frequently Asked Questions

How many tablespoons are in a cup?

16 tablespoons = 1 cup. Half a cup = 8 tablespoons. A quarter cup = 4 tablespoons.

How many teaspoons are in a tablespoon?

3 teaspoons = 1 tablespoon exactly in US customary measurement.

What is the difference between fluid ounces and ounces?

Fluid ounces (fl oz) measure volume — the space a liquid occupies. Ounces (oz) measure mass or weight. 1 US fl oz = 29.574 mL. 1 oz (weight) = 28.35 g. Water is nearly 1 g/mL, so 1 fl oz of water weighs almost exactly 1 oz — but denser or lighter liquids diverge significantly.

What is 1 cup in grams?

It depends entirely on the ingredient. Grams measure mass; cups measure volume. 1 cup water = 240 g. 1 cup flour ≈ 120–130 g. 1 cup sugar ≈ 200 g. 1 cup honey ≈ 340 g. Always look up the specific ingredient rather than assuming a fixed cup-to-gram conversion.

Are US and UK cups the same size?

No. 1 US cup = 236.6 mL. The 'UK cup' is not officially standardized — most UK recipes do not use the cup as a standard unit. Informal UK cup = 284 mL (based on the UK imperial pint) or 250 mL (metric cup common in Australia/Canada). Australian cup = 250 mL. Always check the recipe's country of origin.

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