Cold Brew Ratio Calculator

Cold brewing relies on steeping coarse coffee grounds in cold or room-temperature water for an extended period, typically 12 to 24 hours. Our calculator utilizes a set of foundational equations to determine your recipe requirements. First, it converts your target concentrate volume to required water using the absorption factor: required_water = coffee_concentrate_volume / 0.8. Next, it calculates the coffee grounds mass based on your chosen strength profile using coffee_grounds_mass = required_water / coffee_strength. Volume equivalents and caffeine approximations are then derived using standard density multipliers and extraction coefficients, ensuring a balanced and robust final cup.

Imagine you want to prepare a batch using a target coffee concentrate volume of 32 fluid ounces. First, we determine the required water by dividing 32 by 0.8, which gives us 40 fluid ounces of water. Next, assuming a standard medium-strength ratio where your coffee strength divisor is 4, we calculate the required coffee grounds mass: 40 divided by 4 equals 10 ounces of coarse coffee grounds. Finally, using our conversion factors, we can estimate that this batch will yield a rich caffeine profile ready for dilution with milk or water, giving you the ultimate control over your daily caffeine routine.

Always use a coarse grind setting that resembles raw sugar crystals; a fine grind will lead to over-extraction and a sludgy, bitter brew that is difficult to filter. Filter your water before steeping to ensure clean, crisp flavor notes shine through without mineral interference. Finally, store your finished cold brew concentrate in an airtight glass container in the refrigerator, where it will maintain peak freshness and flavor for up to two weeks.