# Cold Brew Ratio and Batch Planning
Cold brew is easier to repeat when coffee mass, brew water, dilution, and steep time are treated as separate controls. This calculator turns a target brew style into a weighed batch recipe.# Choose Between Ready to Drink and Concentrate
A ready to drink recipe is brewed close to its serving strength. A concentrate recipe uses a tighter ratio and then adds dilution water after filtering. The visual batch card keeps both quantities visible.| Style | Starting ratio | Dilution | Use |
|---|---|---|---|
| Ready to drink | 1:8 | None | Serve over ice or chilled |
| Smooth batch | 1:10 | None | Lighter everyday cup |
| Concentrate | 1:5 | 1:1 | Mix with water or milk |
# How the Cold Brew Calculation Works
- Coffee dose equals brew water divided by the selected ratio.
- Brewed yield is estimated after subtracting approximately 2 milliliters of retained water per gram of coffee.
- Concentrate dilution is calculated from the brewed yield, so the served volume remains easy to read.
# Metric and Imperial Cold Brew Measurements
Choose grams and milliliters for metric recipes or ounces and fluid ounces for imperial recipes. The calculator converts the display while keeping the underlying mass and volume relationship consistent.| Measurement | Metric display | Imperial display |
|---|---|---|
| Coffee dose | g | oz |
| Water and yield | ml | fl oz |
| Brew ratio | 1 part coffee | 1 part coffee |
Use the result as a starting recipe
Coffee origin, grind size, filter, temperature, and draining time all change extraction and final yield. Taste the first batch and adjust one variable at a time.