How Much Ground Coffee Per Cup?
This calculator tells you exactly how many grams (and tablespoons) of ground coffee you need based on the number of cups you want to brew and your chosen brewing method. The industry-standard starting ratio is the Golden Ratio: 1 gram of coffee per 15–18 grams of water (roughly 1–2 tablespoons per 6 oz of water), but every method—drip, French press, espresso, pour-over, AeroPress, cold brew—has its own optimal range. Use this tool to eliminate guesswork, reduce waste, and brew a consistently great cup every single time.
When to use this calculator
- Scaling a drip-coffee recipe from 2 cups to a full 12-cup carafe without over- or under-dosing
- Dialing in an espresso shot (7–9 g per single, 14–18 g per double) before a morning rush
- Prepping a 24-hour cold-brew concentrate that needs a 1:4 to 1:8 coffee-to-water ratio by weight
- Calculating how many whole bags of pre-ground coffee to buy for a weekend camping trip serving 8 people
- Converting a pour-over recipe that uses grams into tablespoons for a kitchen without a scale
Sample Calculation
- Example
- Result
How it works
3 min readHow It's Calculated
Each brewing method uses a specific coffee-to-water ratio based on water volume per cup and desired brew strength. The core formula is:
Coffee Needed (g) = (Number of Cups × Water per Cup in mL) / Ratio
Where:
Ratio = grams of water per gram of coffee (the brewing ratio)
1 mL of water ≈ 1 g of water
Tablespoons ≈ Coffee Needed (g) / 5.3
(1 level US tablespoon of medium-ground coffee ≈ 5–6 g)Note on "cup" sizes: A standard US coffee "cup" in the context of brewing is 6 fl oz (177 mL), not the 8 fl oz legal cup. Most drip machines label their carafes using the 6 oz convention.
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Reference Table
| Brewing Method | Water per Cup | Brew Ratio (water:coffee) | Coffee per Cup | Coffee per Cup (tbsp) |
|---|---|---|---|---|
| Drip / Auto-drip | 6 oz / 177 mL | 15:1 – 17:1 | 10–12 g | ~2 tbsp |
| Pour-Over (V60, Chemex) | 6 oz / 177 mL | 15:1 – 16:1 | 11–12 g | ~2 tbsp |
| French Press | 6 oz / 177 mL | 12:1 – 15:1 | 12–15 g | ~2–3 tbsp |
| AeroPress (standard) | 8 oz / 237 mL | 10:1 – 12:1 | 20–24 g | ~3–4 tbsp |
| Espresso (single shot) | 1.5 oz / 44 mL | 1:2 (yield) | 7–9 g | ~1.5 tbsp |
| Espresso (double shot) | 2.5 oz / 74 mL | 1:2 (yield) | 14–18 g | ~2.5–3 tbsp |
| Cold Brew (concentrate) | 8 oz / 237 mL | 4:1 – 8:1 | 30–59 g | ~5–10 tbsp |
| Moka Pot | 2 oz / 59 mL | 7:1 – 10:1 | 6–8 g | ~1–1.5 tbsp |
| Percolator | 6 oz / 177 mL | 40:1 (weak) | 4–5 g | ~1 tbsp |
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Typical Use Cases with Numbers
Example 1 — 4-Cup Drip Machine (Morning Routine)
Example 2 — 2-Cup Pour-Over for Two People
Example 3 — Cold Brew Batch (Mason Jar, 32 oz)
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Common Errors
1. Using 8 oz as a "cup" for drip machines. Most drip carafe markings use 6 oz per cup. Brewing 12 cups with 8 oz each means you're adding 50% more water than your coffee dose is calibrated for — you'll get weak, under-extracted coffee.
2. Measuring ground coffee by volume without leveling the tablespoon. A heaping tablespoon can hold 8–9 g while a leveled one holds ~5–6 g — a 50%+ difference that throws off the ratio entirely.
3. Using the same ratio for espresso as for drip. Espresso uses a brew ratio measured as input:output yield (e.g., 18 g in → 36 g out = 1:2). Applying a 15:1 water-to-coffee ratio here would produce an extremely under-dosed, watery shot.
4. Ignoring grind size when changing methods. Brew ratio and grind size are linked. A French press uses coarse grounds and a longer steep (4 min); using a fine grind at the same ratio leads to over-extraction and bitter, murky coffee.
5. Not accounting for water retained by grounds. French press and other immersion methods lose roughly 2 g of liquid per gram of coffee to absorption. For 30 g of coffee, you lose ~60 mL of yield — factor this in when targeting an exact output volume.
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Frequently asked questions
What is the standard amount of ground coffee per cup?
The Specialty Coffee Association of America (SCAA) recommends 10 g (about 2 level tablespoons) of ground coffee per 6 fl oz (177 mL) of water as the baseline for drip coffee — a ratio of roughly 17.5:1. This is the industry 'Golden Ratio,' though most people adjust 10–20% to personal taste.
Why does the amount change depending on the brewing method?
Each method extracts coffee differently. Espresso forces near-boiling pressurized water through grounds in 25–30 seconds (high extraction efficiency), needing only 7–18 g for a concentrated 1–2.5 oz shot. Cold brew steeps coarsely ground coffee for 12–24 hours at room temperature with no heat, requiring 4–8× more coffee by weight (1:4 to 1:8 ratio) to achieve the same flavor compounds.
How many tablespoons is 1 gram of ground coffee?
1 level US tablespoon of medium-ground coffee weighs approximately 5–6 grams (the SCAA uses 5.3 g as a standard reference). So 1 gram ≈ 0.19 tablespoons. For practical use: 10 g ≈ 2 level tablespoons, though this varies slightly with grind size (finer grinds pack more densely).
Does the roast level (light vs. dark) affect how much coffee I should use?
Yes, slightly. Light roasts are denser (less moisture has been driven out) and weigh more per volume, while dark roasts are more porous and lighter. A tablespoon of light roast may weigh 6 g, while the same volume of dark roast may weigh only 4.5 g. Weighing in grams rather than tablespoons eliminates this variable entirely and is the professional standard.
How much ground coffee do I need for a 12-cup drip coffee maker?
A standard 12-cup drip machine uses 12 × 6 oz = 72 oz ≈ 2,130 mL of water. At the Golden Ratio (17:1), you need ~125 g of ground coffee, which equals about 22–24 level tablespoons (roughly 3/4 cup by volume). Most pre-ground cans (11.3 oz / 320 g) will yield about 2.5 full 12-cup pots.
What grind size should I use for each brewing method?
Grind size is as critical as dose: Espresso → Extra Fine; Moka Pot → Fine; AeroPress → Medium-Fine; Drip/Pour-Over → Medium; French Press → Coarse; Cold Brew → Extra Coarse. Using the wrong grind at the correct dose still produces bad coffee — over-extraction (fine grind, too much contact time) = bitter; under-extraction (coarse grind, too little time) = sour and weak.
Is it better to measure coffee by weight (grams) or by volume (tablespoons)?
Weight is always more accurate. Volume measurements (tablespoons, scoops) can vary by ±30–40% depending on how ground coffee is packed, the grind size, and humidity. Professional baristas and the SCAA both recommend a kitchen scale accurate to 0.1 g. If you don't have a scale, level off tablespoons carefully and use the reference table for your method.
How much caffeine is in a cup of coffee brewed with the standard ratio?
A standard 6 oz drip cup brewed with ~10 g of ground coffee contains approximately 80–100 mg of caffeine, according to the USDA FoodData Central database. Espresso (1 oz / 7–9 g of coffee) has ~63 mg per shot — less per serving but more per ounce. Cold brew concentrate can reach 150–200 mg per 6 oz before dilution. The FDA considers up to 400 mg/day safe for healthy adults.
Can I use the same amount of ground coffee for both regular and decaf?
Yes — the dose recommendations by brewing method remain the same for decaf. The decaffeination process (Swiss Water, CO₂, or solvent-based methods) removes ≥97% of caffeine but does not significantly change the density or extraction yield of the grounds. You'd use the exact same ratio (e.g., 10 g per 6 oz) for a matching flavor profile, just with negligible caffeine content (<5 mg per 8 oz cup per FDA standards).