Coffee brew ratio
Find coffee, input water or the water-to-coffee mass ratio for a brew.
Your inputs
The editable example is illustrative. Enter your own dimensions, operating data, prices, and fees. Results update as you edit.
Calculations run in your browser. Inputs are not saved or sent to analytics.
Your result
Complete the inputs to see your result.
How it works
- Water mass = Coffee mass × Water-to-coffee mass ratio; Water-to-coffee mass ratio = Water mass ÷ Coffee mass (Water mass ≠ Vout)
- Worked example: 20 g × 16 = 320 g; 300 g ÷ 15 = 20 g
- Supported input limits: Coffee mass: 1e-12 ≤ x ≤ 1000000000000; Water mass: 0 ≤ x ≤ 1000000000000; Water-to-coffee mass ratio: 1e-12 ≤ x ≤ 1000000000000
Assumptions and limitations
Masses use grams. These calculations do not determine cooking time, temperature, fermentation or food safety.
Sources
- OpenStax — fraction arithmetic Sources reviewed: 2026-10-06
