Tomato Sauce Yield Calculator
Fresh tomato weight to finished sauce, jars, and servings.
What it does
Fresh tomatoes shrink a lot on the way to sauce. Water leaves as steam, skins and seeds come out in the sieve, and a basket of fruit turns into a few jars. A yield estimate keeps harvest day calm instead of chaotic.
The tool above converts fresh weight into finished sauce, quart jars, and half cup servings. It uses 5.5 lb of fresh per quart (2.5 kg per liter), the middle of the range published by home canning guides. Pick metric or imperial first, then enter the harvest weight.
That range comes from university canning resources: roughly 3 lb of fresh per quart of canned whole tomatoes, and about 5 to 6 lb per quart of cooked sauce after reduction. Paste tomatoes sit at the low end because they carry less juice; slicers sit at the high end.
Plan with the number, then confirm in the pot. If you reduce hard for pizza sauce, you will land under the estimate. If you keep a light marinara, you will land above it. Either way the jar math tells you how many lids, rings, and freezer tubs to set out.
How to use
- Pick imperial (lb, qt) or metric (kg, L).
- Weigh fresh tomatoes after trimming bad spots.
- Enter the weight and read sauce, jars, and servings.
- Cook down, sieve if smooth sauce is wanted, and measure.
- Match jars to the estimate: one quart jar per quart of sauce.
- Can or freeze the surplus the same day.
Formula
- fresh
- Fresh tomato weight: pounds (imperial) or kilograms (metric).
- 5.5
- Pounds of fresh per quart of sauce.
- 8
- Half cup servings per quart or per liter.
The divisor reflects water lost in cooking: fresh tomatoes are about 95 % water and sauce drives much of it off. Thin juice needs longer reduction than thick pulp, so treat the answer as a planning figure and adjust by how far you reduce.
Worked example
Example: 11 lb fresh tomatoes
11 lb of fresh paste tomatoes cooked down to a basic sauce.
- Fresh weight is 11 lb.
- Sauce: 11 / 5.5 = 2.0 qt.
- Jars: 2.0 qt fills 2 quart jars.
- Servings: 2.0 x 8 = 16 servings.
- Plan: two quart jars feed a family dinner plus leftovers.
Reference table
| Style | Fresh per quart | Note |
|---|---|---|
| Canned whole tomatoes | About 3 lb | No reduction, juice packed |
| Light marinara | About 5 lb | Short simmer |
| Basic sauce (tool) | 5.5 lb | Middle planning value |
| Thick pizza sauce | About 6 lb | Long reduction |
| Paste from slicers | 6 lb or more | Extra water to drive off |
Limits
- Planning figure, not a canning safety claim. Follow tested recipes for acid and process times.
- Variety and ripeness swing yield by 20 % or more.
- Reduction level moves the finish: pizza sauce yields less than marinara.
- Does not count added oil, onions, or peppers.
Common mistakes
- Weighing after cooking instead of fresh.
- Counting jars before reducing to the target thickness.
- Mixing pints with quarts in jar math.
- Skipping added acid in canned jars.
- Freezing hot sauce in stacked tubs.
Try it yourself
Quick checks. Answers sit tucked under each question.
Sauce from 10 kg fresh?
10 / 2.5 = 4.0 L. That fills 4 jars and gives 32 servings.
Sauce from 22 lb fresh?
22 / 5.5 = 4.0 qt. That fills 4 jars and gives 32 servings.
Questions
How many pounds of tomatoes per quart of sauce?
About 5 to 6 lb per quart of finished sauce. Juicy slicers land near 6 lb, meaty paste types near 5 lb. The tool uses 5.5 lb per quart as a middle value.
Can I use slicer tomatoes instead of paste types?
Yes. Wash, core, and cook them down the same way. Sieve out skins and seeds after softening if you want a smooth pour. Paste types just need less time on heat.
How do I know the sauce is thick enough?
Simmer until it mounds lightly on a spoon and measures near one third less than the starting juice. Long thin pans reduce faster than tall pots. Salt only after it thickens so you do not overshoot.
How do I can the extra jars safely?
Ladle hot sauce into hot quart jars, add bottled lemon juice per tested recipes, and process in a water bath for the full published time. Cool, check seals, and store in a dark cupboard.
Can I freeze instead of canning?
Freeze flat in portion bags or rigid tubs with headspace, and use within a year for best flavor. Chill fast after cooking and never stack warm tubs in the freezer.
How many servings per quart?
Roughly 8 servings of half cup per quart. A 2 quart batch gives 16 half cup servings, enough for about 2 lb of dry pasta with sauce to spare.
Sources
- National Center for Home Food Preservation
- USDA food preservation resources
- FDA: select and store produce safely