1. What is Boil Off Calculation?

Boil off calculation determines the volume of liquid lost during the boiling process in brewing. It helps brewers predict final volume and adjust recipes accordingly.

2. How Does the Calculator Work?

The calculator uses the boil off formula:

Where:

• Boil Rate — Evaporation rate in gallons per hour
• Time — Boiling duration in hours

Explanation: The formula calculates total volume lost by multiplying the hourly evaporation rate by the total boiling time.

3. Importance of Boil Off Calculation

Details: Accurate boil off calculation is essential for achieving target original gravity, final volume, and consistent beer quality in brewing.

4. Using the Calculator

Tips: Enter boil rate in gallons per hour and time in hours. Both values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical boil off rate?
A: Typical boil off rates range from 0.5 to 2 gallons per hour, depending on equipment and boil intensity.

Q2: How do I measure my boil off rate?
A: Measure volume before and after a 1-hour boil. The difference is your boil off rate in gallons per hour.

Q3: Does boil off affect beer gravity?
A: Yes, higher boil off concentrates wort, increasing original gravity and potentially altering beer characteristics.

Q4: Can boil off rate vary between batches?
A: Yes, boil off rate can vary based on kettle geometry, boil vigor, atmospheric conditions, and wort composition.

Q5: Should I adjust boil time based on boil off rate?
A: Yes, understanding your boil off rate helps determine optimal boil time to achieve target gravity and volume.