Gravity Correction
The Gravity Correction tool helps you adjust your wort's specific gravity to hit your target numbers.



How to Use
Enter Current Volume - Your wort volume
Enter Current Gravity - Take gravity reading
Enter Target Gravity - Your desired gravity
Select Correction Method:
Add DME/LME if too low
Add water if too high
Adjust boil time
View Calculations - Amount to add or time to boil
When to Use
Pre-boil or post-boil gravity is off target
Correcting efficiency issues
Planning high-gravity dilutions
Correction Methods
If Gravity is Too Low
Option 1: Add Fermentables
Calculate DME (Dry Malt Extract) addition
Calculate LME (Liquid Malt Extract) addition
Calculate sugar additions
Add fermentables during the boil
Option 2: Extend Boil Time
Calculate additional boil time needed
Concentrate wort through evaporation
Adjust hop additions for extended boil
Monitor volume reduction
If Gravity is Too High
Option 1: Add Water
Calculate water volume needed
Use pre-boiled or distilled water
Add before or after boil
Consider mineral adjustments
Option 2: Reduce Boil Time
Calculate shorter boil duration
Less evaporation maintains volume
Adjust hop schedule accordingly
Options
Boil-Off Rate: Typically 2-6 L/hour (0.5-1.5 gal/hour) Extract Values: DME ~45 PPG, LME ~36 PPG
Common Scenarios
Pre-Boil Adjustment
Situation: Mash efficiency lower than expected
Measure pre-boil gravity and volume
Calculate DME needed or extra boil time
Add DME early in boil for best integration
Adjust hop schedule if extending boil
Post-Boil Adjustment
Situation: Missed target OG after boiling
Cool sample for accurate reading
Add DME dissolved in small amount of water
Or dilute with pre-boiled water
Stir gently to incorporate
High-Gravity Brewing
Situation: Intentionally brewing concentrated wort
Plan dilution rate in advance
Calculate water needed at packaging
Maintain hop utilization ratios
Adjust yeast pitch rate
DME/LME Addition Guidelines
Typical Extract Values
DME: 45 PPG (points per pound per gallon)
LME: 36 PPG
Table Sugar: 46 PPG
Corn Sugar: 37 PPG
Adding Extracts
Remove kettle from heat
Slowly add extract while stirring
Ensure complete dissolution
Return to boil
Watch for boil-overs
Water Addition Guidelines
Water Quality
Use filtered or distilled water
Pre-boil to remove chlorine
Cool to wort temperature
Consider mineral content
When to Add Water
Pre-boil: Affects hop utilization
Post-boil: Maintains hop character
In fermenter: Easiest but requires sanitation
At packaging: For high-gravity beers
Boil Time Adjustments
Extending the Boil
Pros:
No additional ingredients needed
Concentrates all wort components
Can improve clarity
Cons:
Changes hop utilization
Increases melanoidin formation
Takes additional time
May darken wort
Reducing Boil Time
Pros:
Preserves delicate flavors
Lighter color retention
Saves time and energy
Cons:
Less protein coagulation
Reduced DMS drive-off
May affect hop utilization
Practical Examples
Example 1: Low Efficiency
Target: 1.050 OG at 19 liters (5 gallons)
Actual: 1.042 at 21 liters (5.5 gallons) pre-boil
Solution: Add 340g (0.75 lbs) DME or boil extra 30 minutes
Example 2: Over-efficiency
Target: 1.048 OG at 19 liters (5 gallons)
Actual: 1.056 at 18 liters (4.8 gallons)
Solution: Add 3 liters (0.8 gallons) water
Tips for Success
Take Multiple Readings: Confirm gravity with multiple samples
Mix Thoroughly: Ensure even distribution of additions
Temperature Matters: Always temperature-correct readings
Document Changes: Note adjustments in brew log
Plan Ahead: Have DME on hand for corrections
Using During Brew Day
Pre-calculate potential corrections before brewing
Keep DME or other correction supplies ready
Document actual values and corrections in your brew notes
Learn from efficiency patterns over time
Adjust future recipe planning based on your system's performance
Prevention Tips
Consistent Efficiency
Maintain consistent grain crush
Monitor mash pH
Ensure proper mash temperatures
Adequate sparging technique
Accurate Measurements
Calibrate equipment regularly
Account for thermal expansion
Use proper sampling techniques
Mix wort before sampling
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