Ounces to Grams for Cooking: Kitchen Conversion Guide

The Basic Conversion

One ounce equals approximately 28.3495 grams. To convert ounces to grams, multiply by 28.35. To convert grams to ounces, divide by 28.35. This conversion is essential for bakers and cooks who follow recipes from different countries or want to achieve precise measurements.

Note the distinction between avoirdupois ounces (used for general weight) and troy ounces (used for precious metals). In cooking, you always use avoirdupois ounces. Fluid ounces measure volume, not weight, and should not be confused with weight ounces, even though water happens to be close to 1 fluid ounce per ounce by weight.

Kitchen Reference Table

Common cooking weights:

• 0.5 oz = 14 g
• 1 oz = 28 g
• 2 oz = 57 g
• 3 oz = 85 g (typical meat serving)
• 4 oz = 113 g (quarter pound)
• 6 oz = 170 g
• 8 oz = 227 g (half pound)
• 12 oz = 340 g
• 16 oz = 454 g (one pound)
• 32 oz = 907 g (two pounds)

For quick mental math, multiply ounces by 30 for a close estimate. Four ounces times 30 gives 120 grams (actual: 113 g). This slightly overestimates but keeps calculations simple in the kitchen.

Why Weight Matters in Baking

Volume measurements (cups, tablespoons) are imprecise for dry ingredients. A cup of flour can weigh anywhere from 120 to 160 grams depending on how tightly it is packed. Professional bakers and pastry chefs worldwide use weight measurements because they produce consistent, repeatable results.

Consider a bread recipe calling for 500 grams of flour. Using volume, that could be anywhere from 3.1 to 4.2 cups. That variation is enough to produce completely different bread, from dense and heavy to light and airy. Measuring by weight eliminates this variable entirely.

A kitchen scale is the most important tool for precise cooking. Digital scales that display both ounces and grams are widely available and affordable. Many also include a tare function, which lets you zero out the weight of a bowl before adding ingredients, making sequential measurement effortless.

Common Ingredient Weights

Knowing approximate weights for common ingredients speeds up recipe conversion:

• 1 cup all-purpose flour = about 4.4 oz (125 g)
• 1 cup granulated sugar = about 7 oz (200 g)
• 1 cup brown sugar (packed) = about 7.7 oz (220 g)
• 1 cup butter = about 8 oz (227 g) or 2 sticks
• 1 large egg = about 1.75 oz (50 g)
• 1 cup milk = about 8.6 oz (245 g)
• 1 cup honey = about 12 oz (340 g)

These weights vary slightly by brand and conditions, but they provide reliable starting points for recipe conversion.

International Recipe Conversion

European and Asian recipes almost exclusively use grams. American recipes traditionally use cups and ounces. Australian recipes sometimes use a slightly different cup size (250 ml vs. the US 237 ml). When converting between systems, weight-to-weight conversion (ounces to grams) is always more accurate than volume-to-volume conversion.

Many modern cookbooks now include both metric and imperial measurements. Online recipe databases increasingly provide gram measurements alongside cups and ounces, reflecting the global shift toward weight-based cooking.

Use the weight converter on CalcHub to convert between ounces, grams, pounds, and kilograms, or explore our cooking tools for volume and temperature conversions.

Convert cooking measurements instantly with CalcHub’s kitchen converter.