HD Proofing & Dilution Calculator

This calculator helps determine how much water to add when reducing alcohol strength, or how much stock spirit and water are needed to fill a set number of containers.

It provides both a simple linear dilution estimate and a more accurate result based on U.S. TTB Table No. 4.

Mode	Proof Down Existing Stock Fill Containers
Container Type	Containers Bottles Casks Barrels Kegs Jugs Demijohns
Container Preset	Custom 375 mL bottle 500 mL bottle 700 mL bottle 750 mL bottle 1 L bottle 1 US gal jug 5 US gal keg/cask 10 US gal keg/cask 30 US gal cask 53 US gal barrel
Container Size		mL Liters US Fluid Ounces US Quarts US Gallons
Stock Strength		ABV % US Proof
Desired Strength		ABV % US Proof
Stock Volume		Liters US Quarts US Gallons
Water to Add (Simple Estimate)		Liters US Quarts US Gallons
Water Weight (Simple Estimate)		lb kg
Resulting Strength (If Using Simple Estimate)		US Proof ABV %
Water to Add (TTB Accurate)		Liters US Quarts US Gallons
Water Weight (TTB Accurate)		lb kg
Final Volume (TTB Accurate)		Liters US Quarts US Gallons
Container Yield
Container Preset	Custom 375 mL bottle 500 mL bottle 700 mL bottle 750 mL bottle 1 L bottle 1 US gal jug 5 US gal keg/cask 10 US gal keg/cask 30 US gal cask 53 US gal barrel
Container Size		mL Liters US Fluid Ounces US Quarts US Gallons
Number of Containers
Total Packaged Volume		Liters US Quarts US Gallons
Stock Spirit Needed (Simple Estimate)		Liters US Quarts US Gallons
Water Needed (Simple Estimate)		Liters US Quarts US Gallons
Estimated Actual Result (using simple split)		US Proof ABV %
Stock Spirit Needed (TTB Accurate)		Liters US Quarts US Gallons
Water Needed (TTB Accurate)		Liters US Quarts US Gallons
Water Needed (Weight - TTB Accurate)		lb kg
Container Summary

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