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Coffee to Water Ratio Calculator
Solves coffee and water grams from a ratio (water parts per 1 part coffee). Typical filter range ~1:15–1:17 by weight.
Limitation: Educational kitchen conversion only.
How to Use Coffee Ratios
Pick what you know—coffee dose, water weight, or both—and set a target ratio such as 16:1 water to coffee by weight.
Choose solve mode.
Weigh when it matters
Volume-to-weight charts are averages. For finicky baking, weigh on a kitchen scale.
What the Ratio Means
A 1:16 ratio uses 16 g water per 1 g coffee (~55–60 g coffee per litre). Lower ratio numbers brew stronger.
Worked Examples
20 g coffee at 1:16
Inputs
Result
20 × 16 = 320 g water (~320 mL).
300 g water at 1:15
Inputs
Result
300 ÷ 15 = 20 g coffee.
Check your cup style
US customary cups differ from metric cups (250 mL). This cluster uses the US legal cup.
Frequently Asked Questions
Still have questions about this calculation?
Try the CalculatorCoffee Ratio Formulas
Weight ratios align with specialty coffee guidance near 55–60 g coffee per litre.
Formula
From coffee
water = coffee × ratio
From water
coffee = water ÷ ratio
Scientific Background
Assumptions follow published kitchen references cited in sources. Results are rounded for display.
Sources & review
Coffee to Water Ratio Calculator documents the references behind its formulas and assumptions. Always treat results as educational estimates, not personalized professional advice.
Last reviewed
July 22, 2026
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