Turn tomatoes and herbs into consistent sauce yields. See jars, portions, and reduction instantly here. Save time, avoid waste, and prep your pantry right.
These sample batches show how trimming and cookdown change jar counts.
| Fresh weight | Trim loss | Cookdown | Added liquid | Jar size | Headspace | Estimated full jars |
|---|---|---|---|---|---|---|
| 12 kg | 6% | 30% | 0.4 L | 500 ml | 10% | ~14 |
| 8 kg | 10% | 40% | 0.2 L | 350 ml | 8% | ~10 |
| 18 kg | 5% | 35% | 0.8 L | 750 ml | 12% | ~17 |
Usable mass = Fresh mass × (1 − Trim%/100)
Cooked mass = Usable mass × (1 − Reduction%/100)
Added mass = Added liquid volume × Density
Final mass = Cooked mass + Added mass
Final volume = Final mass ÷ Density
Full jars = Final volume ÷ (Jar size × (1 − Headspace%/100))
Garden sauces start with a realistic harvest weight. Weigh produce before trimming, then choose a jar size that matches your pantry workflow. The calculator estimates finished volume, full jars, and leftover topping. This supports label counts, lid purchases for each session. Use the optional target jar input to back-calculate an average jar capacity when you must meet a planned distribution count.
Trimming removes stems, cores, tough skins, and spoiled pieces. Cookdown loss represents water evaporated during simmering. A higher reduction produces thicker sauce but fewer jars. Track your typical simmer time, pot diameter, and stirring rate, then reuse those percentages for repeatable yields across seasons. If you roast vegetables first or strain seeds, increase trim loss to keep estimates accurate.
Finished sauce volume depends on density, which links kilograms to liters. Thin sauces sit closer to 1.00 kg/L, while thicker tomato bases often range near 1.03–1.10 kg/L. If you blend in oil, puree, or paste, density can rise. Using a consistent density improves jar forecasts. To measure, weigh a clean container, add 1.000 L, then weigh again and divide.
Safe packaging needs headspace, so you should not fill to the brim. The headspace allowance reduces effective jar fill volume and changes jar counts. The calculator also reports leftovers after full jars. Plan a small container for the remainder, or adjust jar size to minimize partial storage. Align headspace with your chosen preservation method, and remember hot-fill products may settle as they cool.
Professional home processing benefits from batch logs. Export results to CSV for comparisons, and save PDFs with labels for each run. Record harvest weight, losses, density, and jar counts. Over time you can tighten assumptions, reduce waste, and schedule harvest dates around processing capacity. Add notes on salt level, herb blend, and cook time so future batches match flavor and viscosity.
Density converts between mass and volume. If your sauce is thicker than water, each liter weighs more than one kilogram. Using the right density makes jar counts and leftovers more realistic.
Weigh trimmings from a small test batch, then divide by fresh weight. Use that percentage for similar varieties. Increase the value if you peel, deseed, or discard damaged fruit.
Start with your typical recipe. Measure pot weight before and after simmering, or compare volume marks. Longer simmering and wider pots increase evaporation, so cookdown loss rises.
Headspace prevents overflow and supports safe sealing. Because you cannot fill to the rim, effective fill volume is lower than jar capacity. Accounting for headspace keeps jar estimates practical.
Yes. Enter harvest weight, trimming, added oil or liquid, and a density that matches your blend. For very oily sauces, use a slightly higher density and verify with a test jar.
They create a repeatable batch record. You can compare seasons, refine loss assumptions, plan lids and labels, and share a consistent yield estimate with helpers or customers.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.