4 Ounces in Grams: Easy Weight Conversion Guide

Few kitchen moments trip up a cook faster than staring at a recipe that calls for 4 ounces while your scale only reads grams. Here is exactly how many grams are in 4 ounces — and why the answer isn’t always what you’d expect.

4 ounces (oz) to grams (g): 113.398 grams · Conversion factor: 1 ounce = 28.3495 grams · Common rounding: 4 oz ≈ 113.4 g

Here are key conversions at a glance.

Five key conversions, one pattern: the ounce-to-gram relationship is fixed by definition, but rounding varies by context.

How many grams is 4 ounces?

4 ounces equals 113.398 grams under the international avoirdupois system. This figure comes from the standard conversion factor of 1 ounce = 28.3495 grams, as published by RapidTables, a widely used reference tool. Multiply 4 by 28.3495 and you get 113.398 grams exactly.

“4 ounces equals 113.398 grams under the international avoirdupois system.” — RapidTables

“For everyday cooking, 113.4 grams is close enough.” — Erren’s Kitchen

The exact conversion

4 ounces equals 113.398 grams under the international avoirdupois system. This figure comes from the standard conversion factor of 1 ounce = 28.3495 grams, as published by RapidTables, a widely used reference tool. Multiply 4 by 28.3495 and you get 113.398 grams exactly.

Why 113.398 grams?

• The avoirdupois ounce is legally defined as 28.349523125 grams (RapidTables)
• 4 × 28.34952 = 113.39808 (RapidTables)
• Most cooking charts round this to 113.4 g for practicality (Erren’s Kitchen)

The implication: precision matters in baking and science, but for everyday cooking, 113.4 g is close enough. The difference between 113.398 and 113.4 is less than the weight of a single grain of sugar.

Is 4 ounces 100g or close to it?

Why 4 oz is not exactly 100g

A common kitchen myth holds that 4 ounces equals 100 grams. That’s off by about 13.4 percent. The actual conversion: 4 oz = 113.4 g. One hundred grams, by contrast, equals approximately 3.53 ounces (RapidTables).

Common misconception explained

• 100 g ≈ 3.53 oz, not 4 oz (RapidTables)
• The rounding 4 oz ≈ 110 g is used in some cooking charts (Erren’s Kitchen)
• Using 100 g for a 4 oz ingredient throws off hydration ratios in bread and pastry (Erren’s Kitchen)

The implication: always use the correct conversion ratio to avoid recipe failures.

How many grams in 4 ounces of different ingredients (flour, sugar, cream cheese)?

4 oz flour in grams

• Weight: 113.4 grams (RapidTables)
• Volume: about 3/4 cup all-purpose flour (Erren’s Kitchen)

4 oz sugar in grams

• Weight: 113.4 grams (RapidTables)
• Volume: about 1/2 cup granulated sugar (Erren’s Kitchen)

4 oz cream cheese in grams

• Weight: 113.4 grams (RapidTables)
• Volume: about 1/2 cup cream cheese (Erren’s Kitchen)

Why this matters: weight is the constant; volume is the variable. Flour, sugar, and cream cheese all weigh 113.4 g at 4 oz, but they occupy different volumes because of density differences.

How to measure 4 ounces without a scale?

1. Use a liquid measuring cup: 4 fluid ounces equals 1/2 cup.
2. Use tablespoons: 4 ounces equals 8 tablespoons for liquids.
3. Use the water displacement method: submerge the ingredient and measure the displaced volume.

Using measuring cups

For liquids, 4 ounces equals 1/2 cup. Fill a standard liquid measuring cup to the half-cup line. For dry ingredients, the weight-volume relationship varies by ingredient (Erren’s Kitchen).

Using tablespoons

One ounce of water or milk equals 2 tablespoons. So 4 ounces equals 8 tablespoons — or 1/2 cup — for liquids. For solid ingredients, density makes this method inaccurate (Erren’s Kitchen).

Water displacement method

Submerge the ingredient in water and measure the volume change. One fluid ounce displaces about 29.57 ml. Four ounces of any solid ingredient will displace roughly 118 ml of water (YouTube demonstration).

The trade-off: volume methods introduce error, but are useful when a scale is unavailable.

How many ounces in a cup (dry and liquid measurements)?

Liquid cup to oz

One US liquid cup equals 8 fluid ounces. A half cup equals 4 fluid ounces. This is consistent across all liquids (Erren’s Kitchen).

Dry cup to oz

For dry ingredients, one cup’s weight in ounces depends on density. For example, 1 cup all-purpose flour weighs about 4.5 oz (128 g), while 1 cup granulated sugar weighs 7 oz (200 g) (Erren’s Kitchen).

The pattern: liquid volume = consistent; dry weight = variable. Using a cup to measure 4 oz of nuts gives a different amount than using a cup to measure 4 oz of powdered sugar.

Is 250 grams equal to 4 oz?

Comparing 250 g and 4 oz

No. Four ounces equals about 113.4 grams. Two hundred fifty grams equals about 8.8 ounces (RapidTables). They are two very different weights.

When to use each measurement

• Use 4 oz (113 g) for small recipe portions — single cream cheese block, half cup of liquid (Erren’s Kitchen)
• Use 250 g (8.8 oz) for medium portions — one cup of flour, a standard stick of butter plus half (Missouri First Steps conversion chart)

The trade-off: confusing these two common metrics leads to over- or under-additions of up to 2.2×. If a recipe writer meant 4 oz but the cook uses 250 g, they’ve doubled the ingredient.

Common conversions: ounces to grams table

Six common values, one quick reference:

Data sourced from RapidTables conversion table. The pattern is linear: every ounce adds exactly 28.35 grams.

For related measurement conversions, see our articles on Miles to Kilometers and Fahrenheit to Celsius.

For conversions beyond 4 ounces, the same formula applies, with guides available for converting larger quantities like 12 ounces to grams using the same 28.35-gram-per-ounce standard.

Frequently asked questions

For home cooks in the US who frequently encounter metric recipes, the choice is clear: invest in a digital kitchen scale that reads grams. Without one, the 13.4 percent gap between “4 oz ≈ 100 g” and reality will keep tripping you up — batch after batch.