Cooking Unit Conversion: Cups, Tablespoons, and Grams

Introduction

Cooking should be precise, but recipes often use different measurement systems. An American recipe calls for "2 cups of flour," while a European recipe specifies "250g." This guide provides comprehensive conversion tables and explains the critical difference between measuring by volume (cups, tablespoons) and by weight (grams, ounces).

Volume Measurements: US Standard

Basic Volume Units

Teaspoons, Tablespoons, and Cups Relationship

3 teaspoons = 1 tablespoon
2 tablespoons = 1 fluid ounce
4 tablespoons = 1/4 cup
8 tablespoons = 1/2 cup
16 tablespoons = 1 cup

The Critical Difference: Dry vs Liquid Ingredients

Why Weight Matters for Dry Ingredients

Measuring dry ingredients by volume (cups) is imprecise because the density varies based on how packed the ingredient is:

Liquid Ingredients Are More Consistent

Liquids have consistent density (mostly water-based), so volume measurements are more reliable:

Weight Conversions: Grams and Ounces

Metric to Imperial Weight

Common Ingredient Weight Conversions

Temperature Conversions

Fahrenheit to Celsius (and Vice Versa)

Formula:

• °C to °F: (°C × 9/5) + 32 = °F
• °F to °C: (°F - 32) × 5/9 = °C

Common Oven Temperatures

Common Cooking Temperatures

Quick Conversion Cheat Sheet

Volume Conversions (Memorize These)

1 cup = 16 tablespoons = 48 teaspoons = 237 ml
1/2 cup = 8 tablespoons = 24 teaspoons = 118 ml
1/3 cup = 5 tablespoons + 1 tsp = 79 ml
1/4 cup = 4 tablespoons = 12 teaspoons = 59 ml
1 tablespoon = 3 teaspoons = 15 ml

Weight Conversions (Memorize These)

1 ounce = 28.35 grams
1 pound = 16 ounces = 454 grams
100 grams = 3.5 ounces
500 grams = 1.1 pounds
1 kg = 2.2 pounds

Flour Conversion (Most Common)

1 cup all-purpose flour = 125 grams
125g flour = 1 cup = 16 tbsp
If recipe says 250g flour → use 2 cups
If recipe says 2 cups flour → use 250g (more accurate)

Practical Examples

Example 1: Converting a US Recipe to Metric

Original (US):

• 2 cups all-purpose flour
• 1 cup granulated sugar
• 1/2 cup butter
• 2 large eggs
• 1 tsp vanilla extract

Converted (Metric):

• 250g all-purpose flour
• 200g granulated sugar
• 113g butter
• 2 large eggs (~100g)
• 5ml vanilla extract

Example 2: Converting a Metric Recipe to US

Original (Metric):

• 300g bread flour
• 150g brown sugar
• 240ml milk
• 60ml vegetable oil

Converted (US):

• 2.4 cups bread flour (or 2 1/3 cups)
• 3/4 cup brown sugar
• 1 cup milk
• 1/4 cup vegetable oil

Example 3: Scaling a Recipe

To double a recipe that calls for 1.5 cups flour:

1.5 cups × 2 = 3 cups
3 cups × 125g/cup = 375g

Tips for Accurate Measuring

For Dry Ingredients (Weight is Best)

1. Use a digital scale for accuracy (grams are more precise than cups)
2. Spoon and level flour: spoon into measuring cup, level with knife
3. Don't scoop directly with measuring cup (compacts flour, adds ~15%)
4. Pack brown sugar firmly into measuring cup
5. Sift powdered sugar before measuring if recipe specifies "sifted"

For Liquid Ingredients

1. Use clear liquid measuring cups with spout
2. Check at eye level on flat surface
3. Use tablespoons/teaspoons for small amounts (< 1/4 cup)
4. Note: 1 fluid ounce ≠ 1 ounce by weight (except for water, roughly)

For Butter

1. US sticks: 1 stick = 1/2 cup = 8 tbsp = 113g
2. European blocks: Usually marked in grams
3. Softened vs melted: Recipes assume softened unless specified

Common Conversion Mistakes to Avoid

1. Assuming 1 cup = 250ml (it's 237ml; 250ml is a metric cup used in Australia/New Zealand)
2. Using the same conversion for all flours (bread flour is denser than cake flour)
3. Measuring brown sugar like flour (brown sugar must be packed; flour should be light)
4. Confusing fluid ounces with weight ounces (8 fl oz water ≈ 8 oz by weight, but 8 fl oz honey ≈ 12 oz by weight)
5. Ignoring room temperature (butter density changes with temperature)

Regional Differences

US vs UK vs Metric Cups

Tip: If using a recipe from another region, check which cup size they assume!

Related Tools

• Unit Converter - Convert between various units including cooking measurements