Cooking & Food

Canning Altitude Calculator

USDA altitude adjustments for water-bath time and pressure-canner PSI at your elevation.

Enter your details

ft
min
Your result
Adjusted processing time
35 min

At 5,000 ft, process 35 minutes (recipe time + 10 min altitude adjustment). Water boils cooler up high, so jars need longer.

Required pressure
n/a (boiling water)
Time added for altitude
+10 min

About this calculator

USDA altitude adjustments keep home canning safe: above 1,000 ft, boiling-water-bath recipes need extra minutes (up to +20 at 10,000 ft), while pressure canning keeps the same time but requires more PSI. Recipes are written for sea level unless stated.

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