Using Tomato Sauce Instead of Canned Tomatoes: Exact Ratio

Canned Tomatoes provides texture, moisture, and flavor in cooking and baking. When you substitute Tomato Sauce at a ratio of 1 cup tomato sauce = 1 cup canned tomatoes, you preserve the key properties needed for pasta sauce and pizza sauce and soups and casseroles.

There is a noticeable difference in the final result: smoother and often pre-seasoned. Check the label — plain tomato sauce is closest to canned tomatoes. Avoid flavored varieties unless the recipe benefits from the extra seasoning. This trade-off is generally acceptable in pasta sauce where the substitute's other qualities compensate.

As a plant-based option, tomato sauce also makes this swap suitable for vegan and dairy-free diets without sacrificing the role that canned tomatoes plays in the recipe.

Nutritional and safety data referenced from USDA FoodData Central (nutritional composition data) and FoodSafety.gov (food allergen and safety information).

1. Measure the substitute. For every amount of canned tomatoes your recipe calls for, use 1 cup tomato sauce = 1 cup canned tomatoes. Use standard measuring cups or a kitchen scale for accuracy.
2. Prepare if needed. Add tomato sauce at the same point in the recipe where you would normally add canned tomatoes.
3. Mix into your recipe. Add the substitute where the original ingredient is called for. Mix thoroughly to distribute evenly. This method works especially well in pasta sauce, pizza sauce, soups, casseroles.
4. Adjust and taste. After combining, check the consistency of your batter, dough, or mixture. Since this substitute changes the flavor profile slightly, taste and adjust seasoning if needed. Keep in mind: tomato sauce is already smooth, so the texture will differ from diced or whole canned tomatoes.

Tomatoes that are peeled, processed, and sealed in cans at peak ripeness. Available as whole, diced, crushed, or pureed. A kitchen essential for sauces, soups, stews, chili, and braises that provides consistent tomato flavor year-round.

People substitute canned tomatoes for a variety of reasons: dietary restrictions (vegan, dairy-free, or gluten-free cooking), allergies or intolerances, running out mid-recipe, or simply preferring a different flavor profile. Whatever the reason, the key is matching the functional role that canned tomatoes plays, which is primarily texture, moisture, and flavor.

One 14.5 oz can of tomatoes equals about 1.75 cups including liquid. For recipes needing chunky tomatoes, dice fresh ones or use whole canned tomatoes and crush by hand. For smooth sauces, tomato paste diluted with water gives the most concentrated flavor.

Tomato Sauce is one of 4 alternatives you can use instead of canned tomatoes. For a complete list of canned tomatoes substitutes with ratios and cooking tips, visit the full canned tomatoes substitute page.