Extension Logo
Extension Logo
University of Minnesota Extension
extension.umn.edu

Canning at home: Processing times and methods

How to use these pressure canning charts

These charts are provided for experienced canners familiar with safe canning methods. The processing times and methods are adjusted for Minnesota altitudes of 1001-2000 feet.

These reference charts include: 

  • Style of pack
  • Jar size
  • Headspace
  • Process time 

Read instructions carefully for dial gauge and weighted gauge information, as well as notes about certain products. Time assumes a full 10-minute exhausting of the pressure canner. Once pressure is raised to the required pressure and stabilized, timing begins according to the chart.

For more complete canning instructions, refer to the National Center for Home Food Preservation.

Low-acid foods

Pressure canning

  • Boiling water bath canning is not a safe method for processing low-acid foods. Pressure canning increases the internal temperature of food reached during processing to 240 to 250 degrees Fahrenheit. This higher temperature is needed to inactivate certain pathogens, such as Clostridium botulinum.
  • Process time is the most notable variable to pay attention to.
  • The style of pack is either hot or raw, but some foods have both packing styles listed.
  • Jar size is either pints or quarts, but some foods have both jar sizes listed.
  • Head space is often 1 inch, but varies for some foods. Pay close attention to the recipe. Leaving too much headspace and overfilling jars can both cause jars to not seal properly.
  • The dial gauge is 11 PSI for all foods for elevations 0 to 2,000 feet. For every 2,000 feet increase in elevation, increase the PSI by 1 pound (eg. 12 PSI for elevations 2,001 to 4,000 feet).
  • The weighted gauge is 15 PSI for all foods for elevations above 1,000 feet.
 | 

Fruit products

Pressure canning or boiling water bath canning 

Many fruit products are naturally acidic. However, certain fruits require the addition of an acid ingredient during canning. Refer to the notes that accompany the chart below. Additionally, this chart does not provide processing information for fruit toppings, fruit butter or fruit syrups.

  • The processing time is impacted by the style of pack, the jar size, and the type of canning (e.g., boiling water bath or pressure canning)
  • The style of pack is either hot or raw, but some foods have both packing styles listed.
  • Jar size is either pints or quarts, but some foods have both jar sizes listed.
  • For fruit products, the headspace is mostly ½ inch. This provides enough room for the liquid in the jar to boil without interfering with the lid seal. The headspace can be different for certain fruits. Pay close attention to the recipe. Leaving too much headspace and overfilling jars can both cause jars to not seal properly.
  • The dial gauge is 6 PSI for elevations 0 to 2,000 feet. For every 2,000 feet increase in elevation, increase the PSI by 1 pound (e.g., 7 PSI for elevations 2,001 to 4,000 feet).
  • The weighted gauge is 10 PSI for elevations above 1,000 feet. 
  • Note: The weighted gauge pressure for berries is 5 PSI.
 | 

Tomato products

Pressure canning or boiling water bath canning 

  • The processing time is impacted by the style of pack, the jar size, and the type of canning (e.g., boiling water bath or pressure canning).
  • The style of pack is either hot or raw, but some foods have both packing styles listed.
  • Jar size is either pints or quarts, but some foods have both jar sizes listed.
  • For tomato products, the headspace is mostly ½ inch. This provides enough room for the liquid in the jar to boil without interfering with the lid seal. The headspace can be different for certain tomato products. Pay close attention to the recipe. Leaving too much headspace and overfilling jars can both cause jars to not seal properly.
  • The dial gauge is 11 PSI for elevations 0 to 2,000 feet. For every 2,000 feet increase in elevation, increase the PSI by 1 pound (e.g., 12 PSI for elevations 2,001 to 4,000 feet).
  • The weighted gauge is 15 PSI or elevations above 1,000 feet.
 | 

Reviewed by Amy Johnston 

Reviewed in 2026

Page survey

© 2026 Regents of the University of Minnesota. All rights reserved. The University of Minnesota is an equal opportunity educator and employer. This work is supported by the U.S. Department of Agriculture’s National Institute of Food and Agriculture.