How to Dose Coffee by Weight: A Guide to Grams, Ratios, and Consistency

Quick Answer

Start with a 1:16 coffee-to-water ratio—for every gram of coffee, use 16 grams (or milliliters) of water. For a standard 12-ounce cup, that's about 21 grams of coffee. Use a digital scale to weigh your beans before grinding for consistent, repeatable results.

If your coffee tastes different every morning, the culprit is likely inconsistent dosing. Eyeballing scoops can vary by several grams, throwing off your brew. Weighing your coffee beans is the simplest way to achieve a consistent, delicious cup every time.

This guide walks you through the basics of dosing by weight: choosing the right ratio, understanding grams per cup, and using a scale effectively. Whether you're a pour-over devotee or a French press fan, these principles apply to any brewing method.

Why Dose by Weight?

Volume measurements like tablespoons or scoops are unreliable. Coffee bean density varies by roast level and origin, so a scoop of light roast weighs more than the same scoop of dark roast. This means your coffee-to-water ratio is off even if you use the same scoop every day.

Weight eliminates this variability. When you dose by grams, you know exactly how much coffee you're using. This consistency is the foundation of good brewing—once you find a ratio you love, you can replicate it perfectly.

• Invest in a digital scale that reads to 0.1 grams for precision.
• Tare your scale with your brewing vessel to measure water and coffee accurately.

Understanding Coffee-to-Water Ratios

The golden ratio for most brewing methods is 1:16—one part coffee to 16 parts water. This is a great starting point for pour-over, drip, and French press. If you prefer a stronger cup, try 1:14; for a milder cup, go 1:18.

To calculate your dose, divide the amount of water you plan to use by the denominator of your ratio. For example, 500 grams of water at a 1:16 ratio requires about 31 grams of coffee. Adjust from there based on your taste.

• For a single 12-ounce cup (about 340 grams of water), use about 21 grams of coffee at 1:16.
• For a 1-liter batch (1000 grams of water), use about 62 grams of coffee at 1:16.

Weighing Your Coffee Beans: Step-by-Step

Place your brewing vessel or a container on the scale and press tare to zero it out. Add whole coffee beans until you reach your target weight. This is your dose. Grind the beans right before brewing for maximum freshness.

After grinding, you can also weigh the ground coffee to confirm you didn't lose any to static or retention in your grinder. This is especially helpful if you use a hand grinder or a grinder with a doser.

• Always weigh whole beans before grinding—ground coffee can be messier and harder to measure accurately.
• If your grinder retains grounds, weigh your dose after grinding and adjust next time.

Common Dosing Mistakes and How to Avoid Them

One common mistake is not taring the scale properly. Always zero out the scale with your container or brewing vessel on it before adding coffee. Another is using a scale that only reads in whole grams—small variations can add up.

Another pitfall is ignoring the water measurement. Your ratio depends on both coffee and water weight. Use the same scale to weigh your water (1 gram of water equals 1 milliliter) for accuracy. Don't rely on volume markings on your kettle or brewer.

• Invest in a scale with 0.1-gram precision for better accuracy.
• Write down your ideal ratio and dose so you can replicate it easily.

How to Dose Coffee by Weight: Step-by-Step

1. Choose your ratio: Decide on your coffee-to-water ratio. Start with 1:16 (coffee to water) and adjust to taste. For a stronger cup, use 1:14; for a milder cup, use 1:18. Checkpoint: Write down your chosen ratio so you can replicate it.
2. Weigh your water: Place your brewing vessel on a digital scale and tare it to zero. Add water until you reach your desired weight (1 gram = 1 milliliter). This is your water amount. Common mistake: Don't rely on volume markings; they can be inaccurate.
3. Calculate your coffee dose: Divide your water weight by the second number of your ratio. For example, 500g water ÷ 16 = 31.25g coffee. Round to the nearest 0.1 gram. Checkpoint: For a 12-ounce cup (340g water), use about 21g of coffee at 1:16.
4. Weigh your coffee beans: Tare your scale again with the empty container or grinder hopper. Add whole coffee beans until you hit your target weight. Grind immediately before brewing. Common mistake: Weighing after grinding can lead to lost grounds; weigh whole beans first.
5. Brew and adjust: Brew your coffee as usual. Taste it. If it's too strong or bitter, try a slightly higher ratio (more water). If it's weak or sour, use a lower ratio (less water). Checkpoint: Make small adjustments—0.5 to 1 gram at a time—until you find your sweet spot.

Stumptown Coffee Picks for Consistent Dosing

• Hair Bender: Hair Bender is Stumptown’s signature espresso blend, featuring notes of citrus, dark chocolate, and raisin that shine across every brew method. Our go-to espresso in all Stumptown cafés, Hair Bender also makes an exceptional cup as pour-over, drip, or French press—rich, versatile, and consistently delicious. Because Hair Bender performs well across multiple brew methods, it's a great choice for dialing in your preferred coffee-to-water ratio without changing beans.
• Costa Rica Montes De Oro: Montes de Oro is a farm and micro-mill managed by our longtime partners Emilio and Laura Gamboa in Tarrazú, Costa Rica. Their dedication to producing the finest coffee possible shines through in every cup. Single-origin coffees like this can have distinct flavor profiles that respond well to precise dosing. Weighing your dose ensures you experience the full character of the bean.
• Kalita Wave (Stainless): Want a clean, even extraction every time? Then the Kalita Wave is the pour-over brewer for you. This stainless steel brewer from Stumptown Coffee is designed for consistent, balanced cups. Stainless steel construction for durability and heat retention. Flat-bottom design promotes even extraction and a clean flavor profile. Compatible with Kalita Wave filters (sold separately). A reliable choice for pour-over enthusiasts. The Kalita Wave's flat-bottom design rewards consistent dosing. Pair it with a scale to achieve the even extraction it's known for.

Dosing coffee by weight is a small change that makes a big difference. With a reliable scale and a consistent ratio, you'll enjoy a more balanced, flavorful cup every time. Start with a 1:16 ratio, adjust to your taste, and soon you'll be brewing like a pro.