True Proof
True Proof has 4 ratings, averaging 4.0 stars, #31,151 of 61,165 in Utilities.
Description
True Proof calculates the true proof of a water-alcohol mixture at a reference temperature, using the measured apparent proof from a hydrometer reading and the temperature at the time of the reading.
True Proof also performs gauging calculations, and can calculate dilutions taking full account of the temperature-dependent nonideal mixing of water and alcohol.
Calculations are logged, and may be annotated and emailed for archiving.
Multiple units support large-scale distillers and hobby-scale distillers alike, in the US and abroad: concentration measurement in proof, ABV, or density ; temperature in °F or °C; abundance in US gallon, liter, pound, kg, US ton, or metric tonne, etc.
The reference temperature can be selected for US (60ºF) or international (20ºC), or any other value in the range [-20ºC,40ºC]. The instrument thermal expansivity can be selected, which enables application to vibrating tube densitometers in addition to hydrometers.
Two separate computational models are employed - one based on the (US) TTB gauging manual, and one based on OIML (UK, EU, Canada, etc) data. The computer model is limited in temperature and proof range to that spanned by government standard tables.
Growth change in ratings
| Per | Growth | Growth % | Actual change | Measured over |
|---|---|---|---|---|
| day | Not enough history yet | |||
| week | 0 | — | 0 | 10.3 days |
| month | Not enough history yet | |||
| year | Not enough history yet | |||
How these figures are measured
Change in ratings, scaled to each window from the real gap between crawls. A window needs a full period of history before it reports anything.
Tracking since 09/05/2026. History accumulates as changes are observed — check back soon.
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