# Strike Temperature

Calculates the water temperature needed to hit your target mash temperature.

## How to Use

Enter the following values and the tool instantly calculates your strike temperature:

| Input                       | Description                                                                                                                                                     |
| --------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Room Temperature**        | The ambient room temperature                                                                                                                                    |
| **Grain Temperature**       | The current temperature of your grain (usually room temperature)                                                                                                |
| **Mash Target Temperature** | Your desired mash temperature, typically 64-70°C (148-158°F)                                                                                                    |
| **Mash Water Volume**       | The volume of strike water                                                                                                                                      |
| **Grain Amount**            | The total weight of your grain bill                                                                                                                             |
| **Mash-Tun Heat Capacity**  | Your mash tun's heat capacity in L equivalent water volume. Set to 0 if your mash tun is pre-heated. Use the Mash-Tun Calibration tool to determine this value. |

### Output

The tool displays the **Strike Temperature** -- the exact temperature to heat your water to before adding grain.

## About Strike Temperature

Strike temperature is the temperature your water needs to be before adding grain to achieve your desired mash temperature. The grain absorbs heat from the water, so strike water must be hotter than your target mash temperature.

## Factors Affecting Strike Temperature

* **Grain Temperature**: Cooler grain requires hotter water
* **Water to Grain Ratio**: More water retains heat better
* **Mash-Tun Heat Capacity**: Equipment absorbs heat
* **Target Mash Temperature**: Your desired mashing temperature
* **Ambient Temperature**: Affects heat loss

## Common Mash Temperatures

### By Style

* **Light/Dry Beers**: 63-66°C (146-150°F)
* **Balanced Beers**: 66-68°C (150-154°F)
* **Full-bodied Beers**: 68-70°C (154-158°F)
* **Single Infusion**: 67°C (152°F) typical

### Enzyme Activity

* **β-Amylase**: 60-66°C (140-150°F) - fermentable sugars
* **α-Amylase**: 66-71°C (150-160°F) - dextrins/body

## Water to Grain Ratios

### Typical Ratios

* **Thick Mash**: 2.1-2.6 L/kg (1.0-1.25 qt/lb)
* **Medium Mash**: 2.6-3.1 L/kg (1.25-1.5 qt/lb)
* **Thin Mash**: 3.1-4.2 L/kg (1.5-2.0 qt/lb)
* **BIAB**: 5.2-8.3 L/kg (2.5-4.0 qt/lb)

### Effects of Ratio

* **Thicker**: Better enzyme preservation
* **Thinner**: Better conversion efficiency
* **Temperature Stability**: Thicker holds temp better

## Preheating Your Mash Tun

### Methods

1. **Hot Water Rinse**: Add boiling water, swirl, dump
2. **Fill and Wait**: Fill with hot water 10 min early
3. **Heat with Strike Water**: Add extra hot water first
4. **Insulation**: Wrap tun to maintain temperature

### Benefits

* More predictable results
* Less heat loss to equipment
* Easier temperature control
* Set Mash-Tun Heat Capacity to 0

## Step Mashing Considerations

### Adding Hot Water

* Calculate volume needed
* Must be near boiling
* Limited by tun capacity
* Thins mash each step

### Temperature Steps

* **Protein Rest**: 50°C (122°F)
* **β-Glucan Rest**: 40°C (104°F)
* **Saccharification**: 64-70°C (148-158°F)
* **Mash Out**: 76°C (168°F)

## Practical Examples

### Example 1: Standard Infusion

* 4.5 kg (10 lbs) grain at 21°C (70°F)
* Target: 67°C (152°F) mash
* 14 liters (3.75 gallons) water
* Strike Temperature: 73°C (164°F)

### Example 2: BIAB

* 5.5 kg (12 lbs) grain at 18°C (65°F)
* Target: 68°C (154°F) mash
* 30 liters (8 gallons) water
* Strike Temperature: 70°C (159°F)

## Troubleshooting

### Missed Target Temperature

**Too Low**:

* Add boiling water carefully
* Stir well to distribute
* Recalculate enzyme activity

**Too High**:

* Add cold water
* Stir to cool
* Wait if slightly over

### Heat Loss Issues

* Preheat mash tun better
* Improve insulation
* Work faster
* Account for ambient temperature

## Tips for Success

1. **Measure Accurately**: Use good thermometer
2. **Preheat Equipment**: Consistent results
3. **Stir Well**: Even temperature distribution
4. **Work Quickly**: Minimize heat loss
5. **Take Notes**: Track what works

## Using with Your Equipment

* Enter your specific Mash-Tun Heat Capacity value from the calibration tool
* The tool remembers your last entered values
* Track what strike temperatures work for your system
* Adjust based on your brewing environment

## Related docs

* [Mash Profiles](/profiles/mash.md)
* [Recipe Designer](/recipes/designer.md)


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