This coffee ratio calculator helps you calculate the amount of water needed for a specific dose of coffee based on a brew ratio (for example 1:15 or 1:16).
Brew ratios are commonly used for pour-over and drip coffee. This tool provides a quick estimate you can use when dialing in recipes.
Coffee Ratio Calculator
How this calculator works
A brew ratio describes how many grams of water you use per gram of coffee (for example 1:15). This calculator multiplies your coffee dose by the selected ratio to estimate the water needed.
Because 1 gram of water is approximately equal to 1 milliliter, the result is also shown in milliliters.
Example
If you use 18 g of coffee with a 1:15 ratio, you would need about 270 g (270 ml) of water.
Important note
This calculator provides a general estimate. Actual results can vary depending on grind size, brew method, and coffee type.
Frequently Asked Questions
What is a good coffee ratio?
Common pour-over ratios are often around 1:15 to 1:17, but personal preference and brew method matter.
Is a higher ratio stronger or weaker?
A higher ratio (for example 1:17) usually produces a weaker cup, while a lower ratio (for example 1:14) is stronger.
Does this work for espresso?
Not exactly. Espresso is typically discussed in terms of coffee dose and beverage yield rather than brew ratios for water input.