Altitude Canning Adjustment Calculator

Calculate altitude adjustments for water-bath and pressure canning processing times and PSI.

Base Processing Time

min

Altitude

Canning Method

Tab to move between fields

Adjusted Processing Time

40 min

Required PSI

0 PSI

Time Added20 min

PSI Added0 PSI

Altitude Above Baseline4,000 ft

How to Use This Calculator

Enter the base processing time from your tested canning recipe at sea level.
Enter your altitude in feet above sea level.
Select your canning method (boiling water bath or pressure canning).
The calculator shows the adjusted processing time and required PSI, plus adjustments added for altitude.
Use the adjusted time and PSI for every batch to ensure safe preservation at your elevation.

How the result changes with Altitude

Base Processing Time: Sea-level processing time from your tested canning recipe in minutes.
Altitude: Your elevation in feet above sea level. Adjustments start above 1,000 ft.
Canning Method: 1 = Water-Bath (add +5 min per 1,000 ft above 1,000 ft), 2 = Pressure (add +0.5 PSI per 1,000 ft above 1,000 ft).

Identify Input Parameters
Base Processing Time = 20, Altitude = 5000, Canning Method = 1 = 3 input(s) provided
Calculate Adjusted Processing Time
Adjusted Processing Time
40 = 40
Calculate Required PSI
0 = 0
Calculate Time Added
Time Added
20 = 20
Calculate PSI Added
0 = 0

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