Using standard coffee ratios, 340 grams of beans makes roughly 30 to 45 six-ounce cups of brewed coffee, depending on how strong you like it.
Why 340 Grams Matters For Coffee Bags
A 340 gram bag of coffee is the classic “12 ounce” size you see on shelves. When you pick up that bag, you are not just buying beans, you are buying a certain number of mornings, afternoon pick-me-ups, or shared pots with friends. Knowing how many cups that bag can brew helps you budget your coffee habit and plan how often you need to restock.
Most brew guides point to a coffee-to-water ratio in the range of 1:15 to 1:18 by weight for filter coffee. Many sources that reference the Specialty Coffee Association brewing guidance describe a “golden” starting point of about 10 grams of ground coffee for each 180 milliliters (6 fluid ounces) of water, or roughly 55 grams of coffee per liter of water for a well balanced cup. That ratio gives us a practical way to turn a 340 gram bag into cup counts.
On top of that, real cups are not all the same. A drip machine “cup” is often 6 ounces, while a big mug at home can sit closer to 10 or 12 ounces. So the answer to how far 340 grams stretches always comes back to both ratio and cup size.
How Many Cups Of Coffee Does 340 Grams Make For Standard Brew?
If you just want the quick math on how many cups of coffee does 340 grams make?, the cleanest place to start is that common 10-gram dose for a six-ounce cup. Divide 340 grams by 10 and you get about 34 standard small cups from a single bag.
Switch to a larger eight-ounce mug with the same strength and the math shifts. A six-ounce cup at 10 grams of coffee scales to about 13.3 grams for eight ounces of water, so a 340 gram bag will brew around 25 to 26 eight-ounce mugs. Drop the dose a little for a lighter cup or raise it for a richer one and those totals move up or down.
Here is a broad look at how different strength targets change your cup count from the same 340 gram bag, using a six-ounce cup as the reference size.
| Brew Strength Style | Coffee Per 6 oz Cup (g) | 6 oz Cups From 340 g |
|---|---|---|
| Very Mild Everyday Cup | 8 | About 42 |
| Mild Drip Coffee | 9 | About 38 |
| Standard Drip (Golden Ratio Style) | 10 | About 34 |
| Full Bodied Filter Brew | 11 | About 31 |
| Strong Morning Cup | 12 | About 28 |
| Bold Camp Coffee | 13 | About 26 |
| Very Strong Filter Brew | 14 | About 24 |
So with the most common drip recipe in the middle of that range, you can think of a 340 gram bag as giving you somewhere close to a month of single six-ounce cups if you brew one per day, or about two weeks if you brew two small cups per day at that same strength.
How Brew Ratios Change Your Cup Count
Brew ratio is simply the relationship between coffee mass and water mass. A 1:15 ratio means one gram of coffee to fifteen grams of water; a 1:18 ratio uses the same coffee dose with more water, so you get a larger volume of a lighter cup.
Many modern guides that reference SCA style “golden cup” research frame the pleasant range for most drinkers somewhere around 1:15 to 1:18. At 1:15 your coffee tastes fuller and slightly more intense, while 1:18 gives a softer, more delicate profile. Your 340 gram bag does not care which end you pick; the dose per cup is what shifts the yield.
With a 1:15 ratio and a six-ounce cup, you might hover near 12 grams of coffee per serving, so that same bag will brew about 28 cups. Move toward 1:18 and closer to 9 grams per cup, and the bag stretches toward 37 or 38 cups. The taste trade-off sits entirely with you.
Cups Of Coffee 340 Grams Makes Across Brew Styles
Different brew methods use different dose ranges, even when they sit inside that same broad ratio band. This is where 340 grams turns into very different day-to-day experiences in your kitchen.
Drip Coffee Maker Brew Yield
For a drip machine, a common starting point is 10 to 12 grams of medium grind per “cup” on the machine scale, which usually means six ounces of water. With that in mind, a 340 gram bag gives you roughly 28 to 34 machine cups before you hit the bottom of the bag.
If your machine has a full pot line of 10 “cups” at six ounces each, that is 60 ounces of water. At a middle-of-the-road 1:16 ratio you would dose about 110 to 115 grams of coffee for the pot. Your 340 gram bag will handle three full pots at that strength with a little left over, or two strong pots with leftovers for a smaller third brew.
French Press Brew Yield
French press fans often lean toward a richer cup, using 1:15 or even 1:14 ratios with a coarse grind. A one-liter press at 1:15 uses around 67 grams of coffee. In that case a 340 gram bag makes five full presses with a small reserve. Split each liter into three large mugs and you are looking at about 15 heavy mugs per bag.
Scale that down to a half-liter press and doses in the 30 to 35 gram range per brew. Here, your 340 gram bag now delivers around 10 to 11 half-liter brews, which might match a couple sharing one pot in the morning for a week and a half.
Pour Over Brew Yield
Single cup pour over recipes tend to land in that 1:15 to 1:17 range with doses between 15 and 22 grams. A common V60 recipe uses 18 grams of coffee with about 270 milliliters of water. With this kind of recipe, a 340 gram bag yields about 18 or 19 individual pour overs.
If you brew slightly smaller cups at 15 grams per brew, you step up to around 22 or 23 pour overs per bag. Raise your dose to 22 grams for a deeper cup and your bag drops to roughly 15 pour overs. The bag size stays fixed; your taste choices move the cup count.
Espresso And Moka Pot Yield
Espresso uses far smaller cups with much higher doses per ounce of beverage. A double shot recipe often uses 18 grams of coffee for roughly two ounces of espresso. Using that as a guide, a 340 gram bag gives around 18 or 19 double shots.
A stovetop moka pot sits somewhere between espresso and drip. A six-cup moka pot might use 20 to 22 grams of coffee for about 6 to 7 ounces of strong concentrate. Fill that pot once per day and your 340 gram bag lasts about 15 brews. If you only pull out the moka pot for weekend brunch, that same bag will hang around for several weeks.
How Many Cups Of Coffee Does 340 Grams Make For Daily Habits?
So in real kitchen terms, when you ask how many cups of coffee does 340 grams make, the better way to think about it is “how many days of my normal routine does this bag cover?” Once you know your dose per cup, the math turns simple and you can match your shopping rhythm to your habit.
The table below assumes a medium strength filter coffee around 10 to 12 grams per six-ounce cup, or an eight-ounce mug scaled from the same starting point. It gives you a feel for how long one bag lasts for different drinking patterns.
| Drinking Habit Pattern | Cups Per Day | Days A 340 g Bag Lasts |
|---|---|---|
| One Small 6 oz Cup Per Day | 1 | About 34 Days |
| Two Small 6 oz Cups Per Day | 2 | About 17 Days |
| One 8 oz Mug Per Day | 1 | About 25 Days |
| Two 8 oz Mugs Per Day | 2 | About 12–13 Days |
| Weekend Only: Two Mugs Sat & Sun | 4 Per Weekend | About 6–7 Weekends |
| Office Pot: Eight Small Cups On Weekdays | 8, Mon–Fri | About 4 Full Workdays |
| Espresso Home Bar: Two Double Shots Daily | 2 Double Shots | About 9 Days |
These numbers sit on the middle of the dose range. If you like your filter coffee closer to the light end, your bag stretches longer. If you brew thick and punchy cups each time, the bag runs out sooner. Once you have a sense of your own grams-per-cup habit, you can tune the table to match your kitchen.
Ways To Stretch Or Shorten A 340 Gram Bag On Purpose
Sometimes you want to stretch a bag across more days, and sometimes you care more about flavor impact than raw yield. Small tweaks make a real difference without turning your coffee into something you no longer enjoy.
Dial In Grind And Ratio Together
Grind size and ratio work as partners. A slightly finer grind extracts more from the same dose, which can let you shave a gram or two off each cup without losing flavor. A slightly coarser grind gives a cleaner, lighter cup, which might feel right if you already sit at the strong end of the range.
If you change grind in a big way, adjust ratio in small steps and taste after each change. That way you avoid jumping from flat and thin to bitter and muddy in one move. Slow tweaks keep the bag count and the flavor line pointed in a direction that suits you.
Match Cup Size To The Moment
You do not need a full mug every time. On days when you only want a short mid-day pick-me-up, brew a six-ounce cup instead of a twelve-ounce mug at the same strength. The ratio stays the same; you just use fewer grams of coffee and get more total cups out of your 340 gram bag.
On slow weekend mornings, lean the other way. Brew a larger mug or a second cup and accept that the bag will empty a bit faster. The whole point of doing the math is to give you control, not to lock you into one fixed pattern.
Keep Measurements Consistent
Scales make this painless. If you weigh both beans and water, your dose stays steady and your bag yield becomes predictable. With scoops and eyeballing, dose drifts from day to day, which explains why some bags seem to vanish faster than others.
Once you pick a favorite recipe, jot it down and stick it on the grinder or cabinet door. Note the grams of beans, the water volume, and the cup size you pour into. After that, every time you pick up a new 340 gram bag you already know exactly how many mornings it will cover.
Finding Your Own Sweet Spot Between Taste And Yield
Like most coffee questions, the real answer to “How many cups does this bag make?” depends on your taste and your gear. The math gives you a solid frame and the SCA style ratios provide a tested range, but in the end your tongue decides where along that range you feel happiest.
Use the standard 10 grams per six-ounce cup as a starting point. From there, decide whether you care more about getting 40 lighter cups, 30 richer cups, or something in between from your 340 gram bag. Once you know your preference, you can set a recipe, shop with confidence, and step into each brew already knowing what that bag in your hand will deliver.