Runs on this device. Inputs are not uploaded or saved. Results rounded for display.
How to use it
- Measure the inputs in the units shown. Keep a note of your original recipe.
- Change the relevant input and calculate. Compare the answer with the worked example below.
- Use the output within the stated limits; reset to restore the example inputs.
Worked example
20 g coffee / 320 g water scaled to 800 g water needs 50 g coffee.
Assumptions and limits
Scaling mass does not guarantee the same flow or taste. A larger bed may need a different grind or pouring schedule.
Questions
What does this result establish?
Multiply every ingredient by new water / original water. It provides the stated arithmetic or random ordering; it is not a taste or equipment certification.
What measurements should I use?
Original coffee (g); Original water (g); New water target (g). Keep the units consistent rather than copying a number from a differently labelled recipe.
Why is an input rejected?
Blank, non-finite, negative or out-of-domain measurements cannot produce a valid answer. Each field has a bounded range. Incompatible combinations show an explanation instead of retaining a previous result.
Can I use this without an account?
Yes. Once this page and its modules load, the calculation runs locally without accounts, external APIs or input storage. Reloading restores the defaults.
Related tools
Iced Pour-Over Water and Ice
Total water = dose × ratio. Ice = total water × ice share. Hot water is the remainder.
Open tool →Staged Pour Planner
Subtract bloom from total water and divide the remaining water into equal additions. Results distinguish added and cumulative weights.
Open tool →Immersion Beverage Yield Estimate
Estimated collected beverage = water − coffee × retained water factor − other loss.
Open tool →