Recipes call for tomatoes by weight, cups, whole tomatoes, or cans, and the amounts rarely match. As a guide, 1 pound of tomatoes equals about 3 medium tomatoes, 2.5 cups chopped, or 7 to 8 plum tomatoes. Enter any amount below and convert instantly between weight, volume, whole tomatoes, baskets, and cans.
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What your result means: every conversion runs through weight, the one measure that stays constant, so counts of whole tomatoes are rounded to sensible numbers. The result updates as you change any field.
How do you use the converter?
Type an amount, choose what you are starting from, then choose what you want. The answer appears at once and changes live as you edit any field.
- Enter the amount you have or need.
- Pick the From unit, such as pounds, cups, or medium tomatoes.
- Pick the Convert-to unit to read the equivalent.
What each result means
| Result type | What it tells you |
|---|---|
| Weight (lb, oz, g, kg) | The exact mass, the most reliable measure for recipes |
| Volume (cups, pints, quarts) | Chopped or diced volume, useful for sauces and canning |
| Whole tomatoes (medium, plum, cherry) | How many to pick or buy, rounded to whole fruit |
| Cans (14.5 oz, 28 oz) | Fresh-tomato equivalent of a standard can |
Tomato conversion chart
These are the standard equivalents the converter uses. One pound of fresh tomatoes is the common reference point.
| 1 pound of tomatoes equals about | Amount |
|---|---|
| Medium tomatoes | 3 to 4 |
| Large / beefsteak tomatoes | 2 |
| Plum / Roma tomatoes | 7 to 8 |
| Cherry tomatoes | 25 to 30 |
| Chopped, in cups | 2.5 cups |
| 28 oz can (fresh equivalent) | about 0.6 can |
How does the conversion work?
The tool converts your amount into grams using a standard weight for each unit, then divides by the target unit’s weight to get the result.
result = grams divided by to-unit weight
Example weights: 1 lb = 453.6 g · 1 cup chopped = 180 g · 1 medium = 123 g
Because everything passes through weight, you can convert between any two units, even volume to whole tomatoes, without chaining separate charts.
Worked example
Say a recipe needs 2 pounds of tomatoes as medium fruit. The tool multiplies 2 by 453.6 to get about 907 grams, then divides by 123 grams per medium tomato to get roughly 7 medium tomatoes. So 2 pounds is about 7 medium tomatoes to buy.
Factors that change the conversion
- Variety and size: a large beefsteak weighs far more than a Roma, so counts shift with type.
- Ripeness and water content: juicy, very ripe tomatoes weigh a little more per fruit.
- Chopped versus whole: a cup of tightly packed diced tomato weighs more than a loose cup.
- Peeled and seeded: removing skins and seeds lowers the usable weight by roughly a tenth.
- Drained versus packed cans: a can’s drained solids weigh less than its total contents.
Understanding your outputs
| Output | Meaning | Best used for |
|---|---|---|
| Grams line | The weight your amount converts to | Scaling a recipe precisely |
| Cups result | Chopped volume | Sauce, salsa, and canning batches |
| Whole count | Rounded number of tomatoes | Shopping and harvest planning |
| Can result | Fresh equivalent of canned | Swapping fresh for canned in a recipe |
When to use it
Reach for the converter when a recipe lists tomatoes in a unit you do not have, when you are shopping and need to know how many to buy for a target weight, when scaling a sauce or salsa batch up or down, and when swapping fresh tomatoes for canned or the reverse. Canning recipes in particular mix pounds, quarts, and cans, so a single tool saves several lookups.
Common mistakes to avoid
- Treating all tomatoes as one size: cherry, plum, and beefsteak differ hugely by weight.
- Confusing volume and weight cups: this tool uses chopped weight, not a dry measuring-cup count of whole fruit.
- Ignoring peeling loss: if a recipe wants peeled weight, start from a little more fresh.
- Assuming drained equals total: a 28 oz can holds less drained tomato than its label weight.
- Over-rounding for canning: preserving recipes need accurate weight for safe acidity, so weigh rather than count.
Accuracy and limitations
The converter is accurate for typical average tomatoes, but real fruit varies.
What it calculates accurately: the weight-based math between any two listed units using standard reference weights.
What it does not account for: the exact size of your tomatoes, ripeness, peeling and seeding loss, or packing density. For pressure canning and preserving, weigh your tomatoes for safety rather than relying on counts.
Methodology
Method: single-pivot weight conversion. Inputs used: amount, from-unit, to-unit. Reference weights: 1 lb = 453.6 g, 1 oz = 28.35 g, 1 cup chopped = 180 g, medium tomato = 123 g, large = 227 g, plum = 62 g, cherry = 17 g, 28 oz can = 794 g, 14.5 oz can = 411 g. Rounding: whole tomatoes to the nearest fruit; other results to one or two decimals. Edge cases: empty or non-numeric input prompts for an amount.
Sources: USDA FoodData Central (average tomato weights), The Old Farmer’s Almanac – Tomatoes. Last reviewed: September 24, 2026 · Reviewed by Aiza Anwar.
Frequently asked questions
How many tomatoes are in a pound?
One pound of tomatoes is about 3 medium, 2 large, or 7 to 8 plum (Roma) tomatoes.
How many cups is a pound of tomatoes?
One pound of fresh tomatoes yields about 2.5 cups chopped or diced.
How much is a 28 oz can of tomatoes in fresh tomatoes?
A 28 oz can is about 1.75 pounds, or roughly 5 to 6 medium fresh tomatoes.
How many cherry tomatoes are in a pint?
A dry pint basket of cherry or grape tomatoes weighs about 10 to 11 ounces and holds roughly 18 to 25 cherry tomatoes, depending on size.
How many pounds of tomatoes make a quart of sauce?
About 3 pounds of fresh tomatoes cook down to roughly 1 quart of sauce, since simmering removes water.
How many tomatoes do I need for a gallon of sauce?
Plan on about 12 pounds of fresh tomatoes per gallon of finished sauce, allowing for reduction during cooking.
Can I substitute canned tomatoes for fresh?
Yes. A 14.5 oz can equals about 5 to 6 whole plum tomatoes or 3 medium, so match by weight for best results.
How much does one medium tomato weigh?
An average medium tomato weighs about 123 grams, roughly 4.3 ounces. Large beefsteak types can double that.
How many tomatoes are in a bushel?
A bushel of tomatoes weighs about 53 pounds and holds roughly 150 medium tomatoes, enough for a large batch of sauce or canning.
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This converter provides general kitchen guidance using average tomato weights, not exact measurements for every fruit. For pressure canning and preserving, weigh your tomatoes to ensure safe acidity. Spotted an error? Tell us here.