Baking Altitude Calculator Formula

Understand the math behind the baking altitude calculator. Each variable explained with a worked example.

Use the Baking Altitude Calculator

Formulas Used

Adjusted Temperature

adj_temp = recipe_temp_f + (altitude_feet >= 3500 ? 25 : 0)

Adjusted Sugar

adj_sugar = sugar_cups * (1 - alt_factor * 0.01)

Adjusted Liquid

adj_liquid = liquid_cups * (1 + alt_factor * 0.02)

Adjusted Baking Powder

adj_leavening = baking_powder_tsp * (1 - alt_factor * 0.04)

Variables

VariableDescriptionDefault
altitude_feetAltitude(ft)5000
recipe_temp_fRecipe Temperature(F)350
sugar_cupsSugar (cups)(cups)1
liquid_cupsLiquid (cups)(cups)1
baking_powder_tspBaking Powder (tsp)(tsp)2
alt_factorDerived value= altitude_feet / 1000calculated

How It Works

How Altitude Affects Baking

At higher elevations, lower air pressure causes gases to expand more quickly, liquids to evaporate faster, and sugars to concentrate sooner. Adjustments are needed to compensate.

General Rules Per 1,000 ft Above 3,500 ft

  • Temperature: Increase by 15-25F
  • Sugar: Decrease by 1% per 1,000 ft
  • Liquid: Increase by 2% per 1,000 ft
  • Leavening: Decrease by 4% per 1,000 ft

    • Worked Example

    Baking at 5,000 ft with recipe at 350F, 1 cup sugar, 1 cup liquid, 2 tsp baking powder.

    altitude_feet = 5000recipe_temp_f = 350sugar_cups = 1liquid_cups = 1baking_powder_tsp = 2
    1. 01Altitude factor = 5000 / 1000 = 5
    2. 02Adjusted temp = 350 + 25 = 375F
    3. 03Adjusted sugar = 1 x (1 - 5 x 0.01) = 0.95 cups
    4. 04Adjusted liquid = 1 x (1 + 5 x 0.02) = 1.10 cups
    5. 05Adjusted baking powder = 2 x (1 - 5 x 0.04) = 1.60 tsp

    Ready to run the numbers?

    Open Baking Altitude Calculator