Coffee Ratio Calculator
Find the coffee grams for your water and ratio.
Default 1:16
Results update as you type.
How it works
Great coffee comes down to the right ratio of coffee to water, and this calculator gives you the exact amount to use. You enter how much water you are brewing with and your preferred ratio, and it returns the grams of coffee needed and an approximate tablespoon equivalent. The ratio is expressed as one part coffee to a number of parts water, with 1:16 a widely recommended starting point that produces a balanced cup. Because a milliliter of water weighs about a gram, the calculation simply divides the water amount by the ratio to get the coffee weight. Adjusting the ratio changes the strength: a lower number like 1:15 yields a stronger, more intense brew, while a higher number like 1:17 or 1:18 gives a lighter, more delicate cup. Different brewing methods have typical ranges, with pour-over and drip often around 1:15 to 1:17 and stronger methods using less water per gram. Measuring coffee by weight with a scale is far more consistent than using scoops, since bean size and grind vary, which is why specialty coffee guides specify ratios in grams. The tablespoon figure is a rough fallback when you do not have a scale. Dialing in your ratio, then adjusting to taste, is the fastest way to brew better coffee at home. Enter your water amount and ratio to find the coffee weight.
Coffee (g) = water (mL) / ratio
Coffee brewing uses a ratio of water to coffee by weight, commonly written as 1 to a number such as 1:16. Dividing the water amount in milliliters (which weigh about one gram each) by the ratio gives the grams of coffee. A lower ratio makes a stronger brew, a higher ratio a weaker one.
Source:Coffee brewing ratios
We review all our tools from time to time to ensure accuracy.
Worked example
How to use this calculator
- 1
Enter your values
Enter water amount.
- 2
Adjust the options
Adjust ratio (1 : x) if they apply — sensible defaults are already set.
- 3
Read your result
Coffee needed updates instantly as you type — no button to press.
Frequently asked questions
What is a good coffee-to-water ratio?
A ratio of 1 part coffee to 16 parts water, written 1:16, is a popular starting point that produces a balanced cup for pour-over and drip methods. From there you can adjust to taste: use a lower ratio like 1:15 for stronger coffee or a higher one like 1:17 for a lighter brew. The calculator works with any ratio you choose.
How does the ratio affect strength?
A lower ratio number means more coffee relative to water, producing a stronger, more intense cup, while a higher number means less coffee per unit of water, giving a weaker, more delicate brew. Small changes make a noticeable difference, so adjusting the ratio by one or two is an easy way to fine-tune strength to your preference.
Why measure coffee by weight instead of scoops?
Scoops are inconsistent because coffee beans vary in size, density, and grind, so a scoop can hold quite different amounts of coffee. Measuring by weight with a scale gives a precise, repeatable dose every time, which is why specialty coffee guides specify grams. This calculator gives grams, with a tablespoon estimate only as a rough fallback.
Does the brewing method change the ratio?
Yes. Pour-over and drip coffee commonly use ratios around 1:15 to 1:17, while methods like French press are similar and espresso uses a much lower ratio of concentrated extraction. Cold brew often uses a strong ratio then dilutes. Start with the recommendation for your method, then adjust the ratio to match your taste.
How do I convert grams to tablespoons?
One level tablespoon of ground coffee weighs roughly 5 grams, though this varies with grind and bean. The calculator uses this approximation to estimate tablespoons when you do not have a scale. For accuracy, weighing is best, since tablespoon volume can vary considerably depending on how coarsely the coffee is ground.