Moka Pot Coffee Ratio Calculator
Use this moka pot ratio calculator to weigh coffee and water for a rich, even stovetop brew. Enter the water your pot holds (fill to just below the safety valve) or your coffee dose, choose a strength, and get the grams to grind — so your moka coffee tastes the same every time.
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Calculate your moka pot coffee and water
Enter values above and press Calculate to see your result.
Formula used
A moka pot is driven by the water you put in the boiler and the coffee in the basket. As a guide, use a coffee-to-water ratio of 1 : N:
Coffee (g) = Water (g) ÷ N
Typical moka strength sits around 1:7 to 1:11, much stronger than filter coffee. In practice the basket size sets a natural dose — fill it level without tamping — and the boiler is filled to just below the valve. This calculator gives a target coffee weight so you can match a known basket and boiler size, or scale strength up and down.
Worked examples
Classic 3-cup pot. A 3-cup moka boiler holds about 150 ml; at 1:10 that is roughly 15 g of coffee — about a level basket.
Stronger brew. Same 150 ml at 1:8 gives about 19 g, near a heaped basket.
6-cup pot. A 6-cup boiler (~300 ml) at 1:10 needs about 30 g of coffee.
How to use this calculator
- Fill the boiler with water to just below the safety valve and note the volume.
- Enter that water (or your coffee dose) in grams.
- Choose a ratio — 1:10 is a good moka default.
- Press Calculate to get your coffee weight.
- Fill the basket level (do not tamp), brew on low–medium heat, and pull off when it gurgles.
Moka pot coffee by size
Approximate boiler water and coffee for common moka pot sizes at 1:10.
| Moka size | Boiler water (approx.) | Coffee at 1:8 (strong) | Coffee at 1:10 (classic) |
|---|---|---|---|
| 1-cup | 60 ml | 8 g | 6 g |
| 3-cup | 150 ml | 19 g | 15 g |
| 6-cup | 300 ml | 38 g | 30 g |
| 9-cup | 480 ml | 60 g | 48 g |
Moka “cups” are small (about 50–60 ml each), closer to an espresso than a mug.
Who should use this calculator
Anyone brewing with a stovetop moka pot (Bialetti-style) who wants consistent strength instead of eyeballing the basket. It is handy for matching the right coffee weight to your pot size and for adjusting strength when a brew comes out too harsh or too weak.
What each input means
- Start from — usually water, because the boiler fill line fixes the volume; use coffee if you prefer to set the dose.
- Amount — millilitres of boiler water (≈ grams) or grams of coffee.
- Brew ratio — water per gram of coffee. Moka uses strong ratios around 1:8–1:11.
How to read your result
The result gives the coffee to grind for your chosen strength and pot. If the figure is far more than your basket holds level, your pot is simply smaller than that water amount — fill the basket level and do not pack it, as tamping can clog the moka and cause uneven extraction.
Common mistakes to avoid
- Tamping the basket. Moka pots are not espresso machines; fill level and leave it loose.
- Overfilling water above the valve. Keep water below the safety valve for safe pressure.
- High heat. Brew on low–medium; high heat scorches the coffee and makes it bitter.
- Letting it sputter. Pull the pot off the heat when it starts to gurgle to avoid a burnt finish.
Limitations of this calculator
This gives a target coffee weight from a ratio; a real moka pot constrains both water (boiler) and coffee (basket size). Use it to choose strength and to scale between pot sizes. Final taste also depends on grind (a touch coarser than espresso), heat level and timing.
Frequently asked questions
What is the right coffee-to-water ratio for a moka pot?
Around 1:10 is a classic moka strength — about 15 g of coffee for a 3-cup (150 ml) pot. Use 1:8 for a stronger brew or 1:12 for a milder one.
How much coffee for a 6-cup moka pot?
A 6-cup boiler holds roughly 300 ml, so about 30 g of coffee at 1:10. Fill the basket level without tamping.
Should I tamp moka pot coffee?
No. Fill the basket to a level scoop and leave it loose. Tamping raises pressure too much and can lead to uneven, bitter extraction.
What grind for a moka pot?
A fine-to-medium grind, slightly coarser than espresso. Too fine can clog the basket and choke the flow.
Why does my moka coffee taste bitter?
Usually too much heat or brewing too long. Use low–medium heat and take the pot off as soon as it gurgles, then cool the base under cold water.