About 5 pounds of fresh tomatoes cook down to 1 quart of thin sauce, and about 6.5 pounds to a quart of thick sauce, so a big batch takes more fruit than you might expect. Paste is far more concentrated and needs several times as much. Pick your product and how much you want to make below to see the pounds of tomatoes, and roughly how many plants, you need.
Try a preset:
Your entries stay in your browser. Nothing is sent to a server or saved to an account.
What Your Result Means: the pounds are the fresh tomatoes to start with for your batch, and the plant count is a rough guide for growing your own. Yields vary with variety, ripeness, and how thick you cook the product.
How Many Tomatoes for a Batch?
Pick whether you are making thin or thick sauce, crushed or puree, or paste, then enter how much you want in quarts, pints, or cups. The tool multiplies a cook-down rate to give the pounds of fresh tomatoes, the rough number of medium tomatoes, and about how many plants that is.
- Choose Your Product, since paste is far more concentrated than sauce.
- Enter the Amount, the finished quarts, pints, or cups you want.
- Read the Result, then buy or grow that weight of ripe tomatoes.
What Each Result Means
| Result | What It Tells You |
|---|---|
| Pounds of tomatoes | Fresh weight to start your batch |
| Medium tomatoes | Rough count at about 3 to 4 per pound |
| Plants to grow | Approximate plants for your own supply |
| Yield note | How thickness changes the amount |
Tomatoes per Product
Roughly how many pounds of fresh tomatoes each finished product takes. Sauce and crushed figures follow the National Center for Home Food Preservation (NCHFP). Thicker products need more fruit.
| Product | Per Quart | Per Pint | Per Cup |
|---|---|---|---|
| Thin tomato sauce | 5 lb | 2.5 lb | 1.25 lb |
| Thick tomato sauce | 6.5 lb | 3.25 lb | 1.63 lb |
| Crushed or puree | 3.1 lb | 1.6 lb | 0.79 lb |
| Tomato paste | 16 lb | 8 lb | 4 lb |
How Does the Sauce Math Work?
Each product has a cook-down rate in pounds of fresh tomatoes per cup of finished product. The tool converts your target to cups, multiplies by the rate, then estimates tomatoes and plants.
Pounds of tomatoes = rate x target cups
Rate per cup: thin sauce 1.25, thick sauce 1.625, crushed 0.785, paste 4.0
Medium tomatoes = pounds x 453.6 / 123 (about 3.7)
Plants = pounds divided by about 15 lb per healthy plant, rounded up
Thin sauce keeps a little under half the fresh weight, so about 5 pounds make a quart; thick sauce keeps about a third, so about 6.5 pounds make a quart. Paste cooks down much further, which is why it takes several times as many tomatoes.
Worked Example
Say you want 6 quarts of thin tomato sauce. That is 24 cups, and at 1.25 pounds per cup you need about 30 pounds of fresh tomatoes, roughly 111 medium. At about 15 pounds per healthy plant, that is around 2 plants’ worth of fruit. Thick sauce would need about 39 pounds, and paste far more for the same volume.
Factors That Change the Amount
- How thick you cook it: a thicker sauce reduces more and needs more fruit per jar.
- Variety: meaty paste tomatoes have less water and yield more product per pound.
- Ripeness and waste: trimming cores, skins, and bad spots lowers the usable weight.
- Seeding and straining: removing seeds and skins for a smooth sauce reduces the yield.
- Added ingredients: onions, oil, or other vegetables change the final volume.
Understanding Your Outputs
| Output | Meaning | Best Used For |
|---|---|---|
| Pounds | Fresh weight needed | Buying or picking |
| Medium tomatoes | Rough count | Judging a harvest |
| Plants | Approximate plants | Planning a garden |
| Yield note | Thickness effect | Adjusting the batch |
When to Use It
Use it before a canning or sauce day, when buying tomatoes in bulk, or when planning how many plants to grow for a year of sauce. Pair it with the plants needed calculator and the yield estimator for a full plan.
Common Mistakes to Avoid
- Underbuying: sauce reduces a lot, so a small basket of tomatoes makes less than it looks.
- Treating paste like sauce: paste needs several times the fruit for the same volume.
- Forgetting waste: cores, skins, and seeds cut the usable weight; buy a little extra.
- Improvising canning: for shelf storage, follow a tested recipe, not a guessed reduction.
- Ignoring variety: watery slicing tomatoes yield less product than meaty paste types.
Accuracy and Limitations
These are planning estimates from typical cook-down rates.
What It Calculates Accurately: the pounds from the rate and your target volume, plus tomato and plant estimates.
What It Does Not Account For: your exact variety, thickness, waste, or added ingredients. Buy a little extra, and for canning follow a tested recipe for safe processing.
Methodology
Method: cook-down rates in pounds of fresh tomatoes per cup of finished product. Inputs Used: product, target amount, unit. Rates per cup: thin sauce 1.25 lb (5 lb per quart; NCHFP 35 lb per 7 quarts), thick sauce 1.625 lb (6.5 lb per quart; NCHFP 46 lb per 7 quarts), crushed or puree about 0.785 lb (about 3.1 lb per quart; NCHFP 22 lb per 7 quarts), paste 4 lb (about 16 lb per quart, a thick store-style paste). Conversions: quarts x 4, pints x 2, or cups x 1 to get target cups; medium tomatoes at 123 grams each (USDA FoodData Central), about 3 to 4 per pound; plants at about 15 lb per healthy plant, rounded up. Rounding: pounds to one decimal. Edge cases: a zero or empty amount prompts for a positive number. Note: yields vary; for canning follow a tested recipe.
Sources: National Center for Home Food Preservation – Canning Tomatoes, NCHFP – Standard Tomato Sauce, The Old Farmer’s Almanac – Tomatoes, USDA FoodData Central. Last reviewed: September 26, 2026 · Reviewed by Aiza Anwar.
Frequently Asked Questions
How many tomatoes do I need for a quart of sauce?
About 5 pounds of fresh tomatoes, roughly 18 medium, make 1 quart of thin sauce. Thick sauce takes about 6.5 pounds, roughly 24 medium.
How many pounds of tomatoes for a batch of paste?
Paste is very concentrated, so a thick, store-style paste takes about 16 pounds of tomatoes per quart, or about 4 pounds per cup. For canning, the tested NCHFP recipe makes a softer paste: about 14 pounds for 8 to 9 half-pints.
How many tomatoes does a plant give for sauce?
A healthy plant yields about 10 to 25 pounds a season, roughly enough for 2 to 5 quarts of thin sauce, depending on variety and care.
How much sauce does a bushel of tomatoes make?
A bushel is about 53 pounds, which makes about 10 to 12 quarts of thin sauce or 7 to 9 quarts of thick sauce.
Do I need paste tomatoes to make sauce?
No, but they help. Paste or plum tomatoes have less water and more flesh, so they cook down faster into a thicker sauce with less waste.
How much sauce will 20 pounds of tomatoes make?
About 4 quarts of thin sauce at 5 pounds per quart, or about 3 quarts of thick sauce at 6.5 pounds per quart, a little less if you strain out skins and seeds.
How many tomato plants for a year of sauce?
For regular weekly sauce, plan around 10 to 20 paste or slicing plants, since canning uses fruit quickly.
Why does my sauce take so many tomatoes?
Tomatoes are mostly water. Cooking sauce down removes much of that, so thin sauce keeps a little under half the fresh weight and thick sauce about a third.
Can I safely can the sauce I make?
Yes, with a tested recipe. Tomato products need correct acidification and processing time. Follow the National Center for Home Food Preservation guidance for safe canning.
Related Tomato Tools
See How Many Plants with the Plants Needed Calculator
This calculator gives general planning figures for cooked tomato products. Real yields vary with variety, thickness, and waste. For home canning, follow a tested recipe for safe acidification and processing. Spotted an error? Tell us here.