Canning Altitude Adjustment Calculator: Water Bath & Pressure
Calculate exact processing time additions and operating pressure (PSI) increases for boiling water bath and pressure canning at elevations from 0 to 10,000 feet per USDA NCHFP guidelines.
Canning Method & Altitude Settings
1,524 m
min
Altitude-Adjusted Processing Requirement
USDA COMPLIANT
30 min
Base 20 min + 10 min altitude addition (3,001 - 6,000 ft bracket)
Local Water Boiling Point
202.0°F (94.4°C)
-10.0°F below sea level boiling
Canner Target Pressure
N/A (Water Bath)
Ambient atmospheric boiling
USDA NCHFP Guidelines & Altitude Bracket
Elevation Bracket:
4,001 - 6,000 ft
Atmospheric Pressure:
24.9 inHg (84.3 kPa)
Food Safety Category:
High-Acid Foods Only (pH ≤ 4.6)
Botulinum Spore Risk:
Safe (Acid inhibits spore germination)
✅ USDA Standard: Processing time has been increased by 10 minutes to compensate for lower boiling water temperatures at 5,000 ft.