Canning Calculators
Free online canning calculators.
Calculate processing times, jar counts, salt and sugar ratios, and batch sizes for home food preservation.
Canning Jar Sterilization Time at Altitude Calculator
Calculate boiling-water and pressure canning sterilization times by altitude. Get adjusted minutes for safe processing of pickles, jam, tomatoes, and meats.
Canning Altitude Pressure Adjustment Calculator
Calculate pressure canner PSI and processing time for your altitude. Returns USDA adjustments for 1,000 to 8,000 ft for safe low-acid food canning.
Canning Brine Ratio Calculator
Calculate vinegar, water, and canning salt for pickling brine by jar count and size. Covers 1:1, 3:2, 2:1, and full-strength brines using 5% vinegar.
Canning Headspace Guide Calculator
Calculate the correct headspace for canning jars based on food type, jar size, and processing method for safe preservation.
Canning Pectin Ratio Calculator
Calculate the correct pectin-to-fruit ratio for homemade jams and jellies from fruit type, batch size, and sugar level. Covers powdered and liquid.
Canning Sugar Syrup Calculator
Calculate water and sugar for light (20%), medium (30%), and heavy (40%) canning syrups by jar count and size. Includes honey and corn syrup substitutions.
Pickle Brine Ratio Calculator
Calculate vinegar, water, salt, and sugar for pickle brine from your jar size, jar count, and pickle style. Returns cups and grams, with the process time.
Water Bath Canning Time Calculator
Calculate USDA water bath canning times adjusted for altitude, jar size, and food type. Covers jams, pickles, tomatoes, and fruit in pint and quart jars.
Canning Jar Count Calculator
Calculate how many canning jars you need for any batch size. Works for jams, pickles, tomatoes, and any preserved food by volume or weight.
Canning Processing Time Calculator
Adjust a tested canning recipe's processing time for your altitude, using the correct USDA increment, plus the right gauge pressure for pressure canning.