Coffee Calculator

• •Use the Coffee Calculator when you need accurate results quickly without the risk of manual computation errors or unit conversion mistakes.
• •Use it to verify calculations made by hand or in spreadsheets — an independent check can catch errors before they lead to costly decisions.
• •Use it to explore how changing input parameters affects the output — a quick way to develop intuition and identify the most influential variables.
• •Use it when collaborating with others to ensure everyone is working from the same numbers and applying the same assumptions.

Making consistently great coffee starts with using the right amount of ground coffee and water. A standard coffee cup in the US is 6 fluid ounces (not the 8-ounce measuring cup), and most drip coffee makers measure their carafe lines in these 6-ounce increments. The ideal coffee-to-water ratio depends on personal taste: light coffee uses about 8 grams per cup, medium uses 10 grams, and strong uses 12 grams or more. This calculator takes your desired number of cups and strength preference and tells you exactly how much coffee grounds and water to use, in both grams and tablespoons for coffee, and in both fluid ounces and milliliters for water.

• !Confusing a 'coffee cup' (6 oz) with a 'measuring cup' (8 oz) or a mug (12-16 oz).
• !Not adjusting grind size when changing brew methods.
• !Using stale or pre-ground coffee, which loses flavor rapidly after grinding.
• !Measuring coffee by volume instead of weight, leading to inconsistent strength.