Coffee Ratio Calculator
The Coffee Ratio Calculator helps you brew the perfect cup by calculating the ideal coffee-to-water ratio for your brewing method. Enter your desired strength and serving size to get precise measurements in grams and milliliters.
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What is Coffee Ratio?
Coffee ratio is the proportion of coffee grounds to water used in brewing. The Specialty Coffee Association (SCA) recommends a golden ratio of 1:15 to 1:18 (grams of coffee to grams of water). A 1:16 ratio means 1 gram of coffee per 16 grams (ml) of water — producing a balanced, medium-strength cup.
Different brewing methods require different ratios: espresso uses 1:2 (very concentrated), French press 1:15, pour-over 1:16, and cold brew 1:8 (strong concentrate diluted later). Understanding coffee ratios ensures consistency and allows you to fine-tune strength to personal taste.
Fórmulas y Ecuaciones Utilizadas
Esta Coffee Ratio Calculator utiliza 5 ecuaciones principales:
1 Coffee Amount ▼
For 500ml of water at 1:16 ratio: Coffee = 500 / 16 = 31.25 grams.
2 Water Amount ▼
Using 20g of coffee at 1:15 ratio: Water = 20 × 15 = 300 ml.
3 Cups to Volume ▼
3 cups at 250ml each = 750ml total water needed.
Cómo Usar esta Calculadora
Para usar esta Calculadora de Relación, siga 3 pasos:
Ingrese los Valores
Escriba los valores de relación conocidos en los campos de entrada. Deje un campo vacío; ese es el valor desconocido que resuelve la Calculadora de Relación.
Elija el Modo
Seleccione el modo de relación: Resolver, Simplificar o Escalar. Cada modo aplica diferentes ecuaciones a sus valores de entrada.
Obtenga Resultados
Haga clic en Calcular. La pantalla de resultados muestra la respuesta con una barra de relación visual, un gráfico circular y un desglose de la solución paso a paso.
Problemas de Ejemplo y Soluciones Paso a Paso
Aquí hay 3 problemas de ejemplo con soluciones paso a paso usando esta Calculadora de Relación:
Entrada 1 Pour-over: 2 cups at 1:16 ratio
Entrada 2 French press: 1 liter at 1:15 ratio
Entrada 3 Cold brew concentrate: 500ml at 1:8 ratio
Preguntas Frecuentes
What is the golden ratio for coffee? ▼
The SCA golden ratio is 1:15 to 1:18 (1 gram coffee per 15-18 grams water). For most drip and pour-over methods, 1:16 produces a well-balanced cup. Adjust stronger (1:14) or lighter (1:18) to taste.
How many grams of coffee per cup? ▼
For a standard 250ml (8.5 oz) cup at 1:16 ratio, use about 15-16 grams of coffee. For a stronger cup (1:14), use about 18 grams. For a lighter cup (1:18), use about 14 grams.
What ratio is best for espresso? ▼
Standard espresso uses a 1:2 ratio — 18g of finely ground coffee yields 36g of espresso in 25-30 seconds. Ristretto uses 1:1.5 (shorter, more concentrated), and lungo uses 1:3 (longer, milder).
Why should I weigh coffee instead of using scoops? ▼
Coffee density varies by roast level and grind size. A scoop of light roast weighs more than the same scoop of dark roast. A digital scale (accurate to 0.1g) ensures consistent ratios and reproducible results.
What ratio should I use for cold brew? ▼
Cold brew uses 1:5 to 1:8 ratio for concentrate, then dilute 1:1 or 1:2 with water or milk when serving. Start with 1:8 for a versatile concentrate — you can always add more water but can't strengthen a weak brew.