Concrete Cost Calculator

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Perfect Coffee Brewing Ratio Calculator

Standard is 15 to 17
— Choose a Brew Method — Hario V60 (1:16) Chemex (1:17) French Press (1:15) AeroPress Standard (1:13)

Your Brewing Recipe

Ground Coffee Required: 0 grams

Water Required: 0 ml (grams)

Note: 1 gram of water is exactly 1 milliliter.

function calculateCoffeeRequirements() { var water = parseFloat(document.getElementById('waterAmount').value); var ratio = parseFloat(document.getElementById('brewRatio').value); var resultDiv = document.getElementById('coffeeResult'); var coffeeSpan = document.getElementById('coffeeGrams'); var waterSpan = document.getElementById('waterGrams'); if (isNaN(water) || isNaN(ratio) || water <= 0 || ratio <= 0) { alert("Please enter valid numbers for water amount and brewing ratio."); return; } var coffeeNeeded = water / ratio; coffeeSpan.innerText = coffeeNeeded.toFixed(1); waterSpan.innerText = water.toFixed(0); resultDiv.style.display = 'block'; }

Understanding the Coffee to Water Ratio

In the world of specialty coffee, the "brew ratio" is the fundamental foundation of a great cup. It describes the weight of dry coffee grounds relative to the weight of the water used for brewing. Using a precise ratio ensures consistency, allowing you to replicate that perfect cup every morning.

The Golden Ratio: 1:15 to 1:18

The Specialty Coffee Association (SCA) often references the "Golden Cup Standard." Generally, most coffee enthusiasts prefer a ratio between 1:15 and 1:18.

  • 1:15 (Strong): Produces a heavy-bodied, intense cup. Popular for French Press or those who add milk.
  • 1:16 (Balanced): The "sweet spot" for many pour-over drippers like the Hario V60.
  • 1:17 (Mellow): Highlights delicate floral and tea-like notes, often preferred for light-roasted African beans in a Chemex.

Calculation Example

If you want to brew a standard 12oz mug of coffee (approximately 350ml) at a 1:16 ratio, the math works as follows:

350ml (Water) ÷ 16 (Ratio) = 21.8g (Coffee)

By weighing your coffee to 21.8 grams and using 350 grams of water, you ensure the extraction remains within the ideal percentage, preventing your coffee from being too sour (under-extracted) or too bitter (over-extracted).

Why Use Grams Instead of Spoons?

Coffee beans vary significantly in density. A dark roasted bean is much larger and lighter than a light roasted bean. Measuring by volume (tablespoons or scoops) is highly inaccurate. A "scoop" of one coffee might weigh 6 grams, while a "scoop" of another might weigh 9 grams—a 50% difference that will drastically change your flavor profile. Always use a digital scale for the best results.

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