Gauging Calculator

Calculate temperature-corrected proof from an observed hydrometer reading using simplified TTB gauging tables. Standard reference is 60°F.

Observed Proof

Spirit Temperature

°F

Tab to move between fields

Corrected Proof (at 60°F)

94°

Corrected ABV

47%

Proof Correction-6°

Proof Gallons per Wine Gallon0.94

Correction Factor0.94

How to Use This Calculator

Enter the observed proof reading from your hydrometer.
Enter the spirit temperature at the time of the reading.
The calculator returns the temperature-corrected proof at 60 °F, corrected ABV, the correction amount, and proof gallons per wine gallon.
Use the corrected proof for all regulatory reporting and to calculate dilution water for bottling strength.

How the result changes with Observed Proof

Observed Proof: Proof reading from your hydrometer at the current spirit temperature. This is the uncorrected reading.
Spirit Temperature: Temperature of the spirit when the proof reading was taken. TTB standard is 60°F; readings at other temperatures need correction.

Identify Input Parameters
Observed Proof = 100, Spirit Temperature = 75 = 2 input(s) provided
Calculate Corrected Proof
Corrected Proof
94 = 94
Calculate Corrected ABV
Corrected ABV
47 = 47
Calculate Proof Correction
Proof Correction
-6 = -6
Calculate Proof Gallons per Wine Gallon
Proof Gallons per Wine Gallon
0.94 = 0.94

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