Write the quantities in a consistent way
A coffee ratio compares the mass of the dry coffee with the mass of the brewing water. At a 1:16 ratio, 20 grams of coffee corresponds to 320 grams of water. The arithmetic is coffee weight multiplied by the selected water-per-gram value. Use the same units on both sides. The water you pour into a brewer and the beverage that reaches your cup are different quantities, so label the amount you record rather than treating them as interchangeable.
Give the recipe a short identity
Record the coffee, brewer, dose, water and any other settings you want to repeat. A familiar grinder setting or pouring sequence only helps if you can recognize it later. Keep the note small enough to make while brewing: a date, a few quantities and a short observation about the finished cup. The method is yours to adapt. Firehawk Coffee is an independent brew-planning resource and does not sell beans, brewing equipment or a proprietary recipe.
Change one part of the next attempt
If you want to explore a different cup, choose one setting to change while keeping the other recorded settings steady. You might compare two ratios using the same coffee and brewer, then write what you noticed. A preference written in ordinary language can be more useful than a score whose meaning changes each day. The calculator supplies quantities. It does not determine grind size, extraction, water chemistry or which flavor you should prefer.
Keep the result with its context
A recipe that suits one coffee and method may need adjustment with another. Save the identifying details with the result so a pleasing cup can be retried under similar conditions. Check the operating instructions for the equipment you use, including its capacity and care requirements. When scaling a recipe, confirm that the brewer can handle the new quantity. Use this tool to make the arithmetic easy while leaving room for careful tasting and your own practical judgment.
Try scaling the arithmetic
Keep the same ratio and compare the water amount for two different coffee doses. For example, doubling the dose also doubles the calculated brewing water. Check the brewer’s capacity before attempting a larger batch, and record any other settings that need to change for the method. A scaled quantity is a numerical comparison; it does not promise that two differently sized brews will taste identical.
