How many cups is 300 grams of tomatoes?

November 23, 2025 •

3 min read

Approximately 1.2 cups is equivalent to 300 grams of chopped tomatoes, according to Food Nutters. The amount varies based on tomato preparation, highlighting the imprecision of volume measurements for produce. This guide clarifies how many cups is 300 grams of tomatoes.

Quick Summary

Converting 300g of tomatoes to cups depends on preparation. Expect about 1.2 to 1.7 cups for chopped tomatoes. Significant variation is possible.

Key Points

Conversion Varies: The cup equivalent for 300 grams of tomatoes is not fixed and depends on how they are chopped and packed.
Approximate Cups: For chopped tomatoes, 300 grams typically converts to between 1.2 and 1.7 cups, depending on the source and preparation.
Weight is Superior: Measuring by weight (grams) is more accurate and consistent than measuring by volume (cups) for produce.
Whole Tomatoes Differ: The cup yield will differ significantly if you are using whole cherry, plum, or large tomatoes.
Consistent Results: For repeatable results in cooking and baking, always opt for weighing ingredients on a digital scale over using measuring cups.

Understanding Grams vs. Cups for Produce

When measuring fresh produce, like tomatoes, a direct conversion between grams and cups is variable. Unlike consistent ingredients like flour or water, air pockets, chop size, and tomato water content influence volume. While an estimate is useful, recipes needing precision, like baking or canning, should use a digital kitchen scale.

Estimating the Conversion Based on Preparation

Chopped or Diced Tomatoes

The cup equivalent of 300 grams of chopped or diced tomatoes has a range. According to one source, 300 grams of chopped tomatoes equals about 1.2 cups. Another source states 180 grams of chopped tomatoes equals one cup, making 300 grams closer to 1.67 cups. This shows how factors like the dice size and how tightly the tomatoes are packed can affect the result.

Whole Tomatoes

The conversion for whole tomatoes is about the number of tomatoes, not a single volume. The average weight of different tomato varieties can estimate how many 300 grams would be.

One medium tomato (approx. 123 grams) would mean roughly 2.5 medium tomatoes for 300 grams.
One plum tomato (approx. 62 grams) means about 5 whole plum tomatoes.
Cherry tomatoes (approx. 0.66 grams each) would take a large number, making volume or a direct weight measurement more practical.

Puréed or Canned Tomatoes

When tomatoes are puréed or processed into a liquid, the density is more consistent, leading to a more consistent conversion. If a recipe calls for 300 grams of fresh tomatoes to be puréed, expect a yield of approximately 2 cups of purée, based on 1 pound (454g) of fresh tomatoes yielding about 3 cups of purée. For canned tomatoes, the can's label provides a specific weight, the most reliable measurement.

The Argument for Weighing Ingredients

Professional chefs and bakers prefer using a digital scale because it removes guesswork. A cup of tomatoes can be 150 grams or 200 grams, depending on packing, but 300 grams is always 300 grams. Using a scale ensures consistent results every time, especially with precise proportions. While a scale may seem like an extra step for home cooks, it is invaluable for success.

Practical Steps for Measuring Your Tomatoes

Here is a simple process for the most accurate measurement:

Check Your Recipe: Look for specific instructions. Does it call for whole, chopped, or puréed tomatoes?
Use a Scale: If you have a digital kitchen scale, use it. It is the most reliable tool.
If Using Cups: Chop the tomatoes to the size specified in the recipe. Fill a dry measuring cup, but do not pack it tightly. Level off the top with a straight edge.
Understand the Variance: Accept that the cup measurement is an approximation. For most home cooking, a slight difference will not ruin the dish. Prioritize using a scale for sensitive recipes.
Taste and Adjust: Always taste and adjust seasonings or ingredients as needed. Small variations are part of cooking.

Conversion Comparison Table


Type of Tomato Preparation	300 grams (approximate cups)	Notes
Chopped or Diced	1.2 to 1.7 cups	Depends on cut size and packing.
Whole Medium Tomatoes	~2 tomatoes	Based on 1 medium ≈ 123g.
Whole Plum Tomatoes	~5 tomatoes	Based on 1 plum ≈ 62g.
Puréed	~2 cups	Less variation due to uniform consistency.

Conclusion

While 300 grams of chopped tomatoes is roughly 1.2 to 1.7 cups, relying on an exact volume for a non-uniform ingredient is risky. The tomato's state—whole, chopped, or puréed—affects its volume. Measure tomatoes by weight with a kitchen scale for reliable results in any recipe. Use estimates as a guideline for everyday cooking and adjust based on desired texture and flavor.

Use a digital scale for precise measurements as recommended by the National Institute of Standards and Technology (NIST).

Frequently Asked Questions

No, the cup conversion for 300g of tomatoes varies significantly depending on the type of tomato (e.g., cherry, plum) and how it is prepared (whole, chopped, puréed).

Based on various sources, 300g of diced tomatoes is typically around 1.2 to 1.7 cups. The exact volume depends on the size of the dice and how tightly the cup is packed.

Weight is a consistent measure of mass, whereas volume can be influenced by factors like density, packing, and ingredient shape. A cup of loosely packed chopped tomatoes will weigh less than a cup of tightly packed ones.

Since an average medium tomato is around 123 grams, it would take approximately 2.5 medium tomatoes to reach 300 grams.

Yes, a riper tomato often has a higher moisture content and may pack differently than a firmer one, affecting the volume it takes up in a cup.

For a smooth purée, the conversion is more consistent. Based on fresh tomato conversions, 300g of puréed tomatoes would be around 2 cups.

Use grams for best results when precision is important, such as in certain sauces or preserves. For less critical recipes like salads, using cups is acceptable, understanding there will be some variation.