# Gravity Correction

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

![Calculate how much DME to add or how much to boil off if gravity is too low](https://771697612-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LEzhWP2LGeXaKgS2qr4%2F-LFRyl_P6JbL2o6antht%2F-LFRzZp_5fIURKgHUuIc%2Fimage.png?alt=media\&token=ed9c8707-6d2e-4dc2-a8e7-2702ec876143)

![Calculate how much water to add if gravity is too high](https://771697612-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LEzhWP2LGeXaKgS2qr4%2F-LFRyl_P6JbL2o6antht%2F-LFRzf-S2IOdn-oJVex5%2Fimage.png?alt=media\&token=de8e65b6-34da-4280-9734-d23661c8837d)

![Calculate how to correct the gravity by altering boil time if preferred](https://771697612-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LEzhWP2LGeXaKgS2qr4%2F-LFRyl_P6JbL2o6antht%2F-LFRzqyr1VqNl8N6oRjD%2Fimage.png?alt=media\&token=82707dda-517f-496c-9f9a-39b874c3cd83)

## How to Use

1. **Enter Current Volume** - Your wort volume
2. **Enter Current Gravity** - Take gravity reading
3. **Enter Target Gravity** - Your desired gravity
4. **Select Correction Method**:
   * Add DME/LME if too low
   * Add water if too high
   * Adjust boil time
5. **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

1. Remove kettle from heat
2. Slowly add extract while stirring
3. Ensure complete dissolution
4. Return to boil
5. 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