How Much Coffee Per Cup: Ratios for Every Brewing Method

Stop Guessing, Start Weighing

The single most impactful change you can make to your daily coffee is using a consistent coffee-to-water ratio by weight. Scoops are unreliable — a “scoop” of light roast weighs differently than a scoop of dark roast, and packing density varies every time. Weighing with a brew scale removes that variable entirely and makes your results repeatable.

A KitchenTour Coffee Scale costs under $15 and handles this job perfectly. If you want a timer built in, the Hario V60 Drip Scale is a solid step up. For espresso-level precision and speed, the Acaia Lunar or Fellow Tally Pro are worth the investment.

Ratios by Brewing Method

Coffee-to-water ratios are expressed as coffee : water by weight. A 1:16 ratio means 1 gram of coffee for every 16 grams of water. Lower ratios (1:12) produce stronger, more concentrated coffee. Higher ratios (1:17) produce lighter, more delicate cups.

Espresso

Ratio: 1:2 by weight

The standard starting point is 18g of coffee in, 36g of liquid out, in 25-35 seconds. This is not a water ratio in the same sense as other methods — espresso measures input dose to output yield. Some prefer a ristretto (1:1.5) for intensity or a lungo (1:2.5 to 1:3) for a milder shot. Espresso ratios are best dialed in by taste, adjusting grind size to hit the target yield in the target time.

If you are pulling shots on a Breville Bambino Plus or Flair Pro 2, a scale that fits under the cup is essential. The Normcore V4 and Acaia Lunar both fit standard drip trays.

Pour-Over

Ratio: 1:15 to 1:17

Start at 1:16 and adjust from there. A 1:15 ratio gives a slightly stronger, more concentrated cup. A 1:17 ratio is lighter and more tea-like. The right ratio depends on the coffee, the roast level, and your preference. Light roasts often benefit from the lower end (1:15) since they are harder to extract, while medium roasts work well at 1:16 or 1:17.

This applies across all pour-over drippers — the V60, Kalita Wave, Chemex, and others. For more detail, see our pour-over coffee ratio guide.

French Press

Ratio: 1:15

French press benefits from a slightly stronger ratio because the metal mesh filter allows oils and fines through, which adds body but can dilute perceived strength. Start at 1:15 with a 4-minute steep time and coarse grind. If it tastes too strong, try 1:16.

AeroPress

Ratio: 1:6 to 1:12 (concentrate), or 1:15 to 1:16 (full strength)

The AeroPress is uniquely flexible. Many recipes brew a concentrate at 1:6 to 1:8 and then dilute with hot water to taste, similar to an americano. Other recipes brew at full strength (1:15 to 1:16) with no dilution. Championship recipes vary wildly. Start with 15g coffee and 200g water (about 1:13) and adjust to your preference.

Cold Brew

Ratio: 1:5 (concentrate) or 1:8 (ready-to-drink)

Cold brew concentrate at 1:5 is meant to be diluted — cut it 1:1 with water or milk before drinking. Ready-to-drink cold brew at 1:8 can be consumed straight from the fridge. Steep 16-24 hours at room temperature or in the refrigerator, then filter. Cold brew is forgiving — the low extraction temperature means over-extraction is nearly impossible.

Drip Machine

Ratio: 1:16

Most SCA-certified drip machines are calibrated around 1:16 to 1:17. Use this as your baseline. If your machine brews weak coffee, try 1:15. If it brews too strong, try 1:17. The limiting factor with drip machines is usually the machine’s water temperature and distribution, not the ratio.

Practical Gram Measurements

Here are exact doses for common cup sizes at standard ratios. Adjust up or down based on your preference.

Cup Size	Pour-Over (1:16)	French Press (1:15)	AeroPress (1:13)	Drip Machine (1:16)
250ml (8oz)	15.6g	16.7g	19.2g	15.6g
350ml (12oz)	21.9g	23.3g	26.9g	21.9g
500ml (16oz)	31.3g	33.3g	38.5g	31.3g

Note: 1ml of water weighs 1g, so 250ml = 250g of water. These numbers are starting points. Round them to the nearest whole gram — your scale does not need to hit 15.6g exactly. 15g or 16g will both produce excellent coffee.

Why Weight Beats Volume

A “tablespoon” of coffee can weigh anywhere from 5g to 8g depending on grind size, roast level, and how you scoop. Light roasts are denser and weigh more per scoop. Dark roasts are puffier and weigh less. Coarse grinds pack differently than fine grinds. Two scoops from the same bag on different days can vary by 20% or more.

Weight is absolute. 16 grams is 16 grams regardless of the coffee or grind. This is why every serious brewing guide specifies ratios by weight, and why a scale is not optional equipment — it is foundational. If you only buy one piece of coffee gear beyond a grinder and a brewer, make it a scale.

Dialing In Your Ratio

These ratios are starting points, not rules. If your coffee tastes watery or thin, use more coffee (lower ratio like 1:14 or 1:15). If it tastes harsh, bitter, or overwhelming, use less coffee (higher ratio like 1:17). Change one variable at a time and taste the difference. Within a few brews, you will land on the ratio that matches your preference for a given coffee and method.