Alcohol Gauging and Blending Calculations
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This example shows an ABV (Volume %) hydrometer with a calibration temperature of 60°F being used in a sample at 12°C, and giving the true strength at 20°C. The true strength is given in Proof and ABV terms, as well as in Mass % and Density.
This alcohol hydrometer temperature correction calculator is used to make corrections to strength readings taken with hydrometers at temperatures other than the hydrometer's official calibration temperature. This allows rapid and accurate measurements to be made in the plant and laboratory using a standard ethanol hydrometer without having to heat or cool the sample to the exact calibration temperature. The reading can be corrected to any Standard Temperature that you choose, and not only back to the calibration temperature.
Unlike printed hydrometer correction charts which can correct to only one calibration temperature, this calculator is totally flexible and can correct for Density (SG) or ABV hydrometers calibrated at any temperature. Proof hydrometers are of course always calibrated at 60°F.
This complete flexibility allows you to use an hydrometer calibrated in ABV (alcohol by volume), Proof or Density (SG) and get the corrected strength in all three of these options, plus in Mass % terms.
We have prepared some notes on the background theory for hydrometer temperature correction if you want to read up how this works.