Preserving & Canning Calculators
Calculators for jam, chutney, pickles, and preserving jar quantities.
Jam Sugar Ratio Calculator
Calculate the sugar quantity needed for jam based on fruit weight and pectin level.
Jam Jar Quantity Calculator
Calculate how many jars a batch of jam will fill based on total yield and jar size.
Marmalade Calculator
Calculate fruit, sugar, and water quantities for marmalade by batch size.
Chutney Calculator
Calculate vinegar, sugar, and spice quantities for chutney based on fruit or vegetable weight.
Pickling Brine Calculator
Calculate vinegar, salt, sugar, and water quantities for pickling brine by jar volume.
Fruit Curd Calculator
Calculate egg, butter, sugar, and juice quantities for fruit curd by batch size.
Syrup Concentration Calculator
Calculate sugar and water for light, medium, or heavy sugar syrup by volume.
Pectin Stock Calculator
Calculate apple and water quantities for making homemade pectin stock.
Fermented Vegetables Brine Calculator
Calculate salt percentage and brine quantity for fermenting vegetables by jar volume.
Bottling Yield Calculator
Calculate the number of bottles or jars needed from a batch based on volume and container size.
10 free calculators in Preserving & Canning
Precise Calculations for Perfect Preserves
Preserving is one area of cooking where precision truly matters. Getting the sugar-to-fruit ratio wrong can mean jam that will not set, or one that crystallises in the jar. Too little salt in a fermentation brine risks spoilage, while too much inhibits the beneficial bacteria. Our preserving calculators take the guesswork out of these critical ratios so you can make jams, chutneys, pickles, and curds with confidence.
Each calculator is based on well-established preserving science. The jam sugar ratio calculator accounts for the pectin level of different fruits — high-pectin fruits like cooking apples and Seville oranges need a different sugar ratio to low-pectin fruits like strawberries and cherries. The jar quantity calculator factors in the water evaporation that occurs during the boiling process, giving you an accurate estimate of how many jars your batch will fill.
For fermentation, our brine calculators use the standard 2–3% salt concentration recommended for vegetable ferments like sauerkraut and kimchi. The pickling brine calculator provides vinegar, water, sugar, and salt ratios for traditional British pickles. Whether you are a seasoned preserver or making your first batch of strawberry jam, these tools ensure your ratios are spot on every time.