What does a 1:16 coffee ratio mean?
Quick answer
For filter coffee, 1:16 means 1 g coffee for 16 g input water. At 240 g water, use 15 g coffee; at 500 g, use about 31.3 g. It describes what you put into the brewer, not finished beverage yield. Espresso ratios usually compare coffee dose with beverage output; cold-brew concentrate needs a separate dilution step.
Calculate in either direction
- Coffee dose = input water ÷ ratio denominator. Example: 300 ÷ 16 = 18.75 g, displayed as about 18.8 g.
- Input water = coffee dose × ratio denominator. Example: 20 × 16 = 320 g water.
- Ratio denominator = input water ÷ coffee dose. Example: 240 ÷ 15 = 16, so the ratio is 1:16.
For kitchen recipe planning the calculator approximates 1 ml water as 1 g. The approximation is for water input, not milk, espresso yield or a claim about the filtered cup. Its labelled “cup” is 240 ml; four such planning units are 960 ml input water, not four guaranteed full mugs of finished coffee.
Calculate coffee and input water
Choose your method, enter the water amount and check the ratio. The tool supplies a repeatable dose; your equipment and the method guide set the physical limits.
Starting ratios by method
These are this site's editorial starting recipes, not universal standards. Follow the linked method before scaling.
| Method | Starting ratio | What the two numbers compare | Example |
|---|---|---|---|
| V60 / pour over | 1:16 | Dry coffee : input water | 15 g : 240 g |
| French press | 1:15 | Dry coffee : input water | 20 g : 300 g |
| Upright AeroPress | 1:14 | Dry coffee : input water | 15 g : 210 g, for the linked recipe |
| Drip machine | 1:16 | Dry coffee : input water | 30 g : 480 g, within the machine's limits |
| Cold brew concentrate | 1:8 | Dry coffee : extraction water | 60 g : 480 g, then filter and measure |
| Espresso | 1:2 beverage yield | Dry coffee : espresso output | 18 g in : 36 g beverage out |
| Moka pot | Hardware-limited | Basket and boiler limits come first | Do not change basket fill or cover the safety valve to chase a number |
Worked dose table
All water columns mean input water. Values are rounded to one decimal when needed.
| Water | Filter 1:16 | French press 1:15 | AeroPress arithmetic 1:14 | Concentrate arithmetic 1:8 |
|---|---|---|---|---|
| 240 g | 15 g | 16 g | 17.1 g | 30 g |
| 300 g | 18.8 g | 20 g | 21.4 g | 37.5 g |
| 500 g | 31.3 g | 33.3 g | 35.7 g | 62.5 g |
| 960 g | 60 g | 64 g | 68.6 g | 120 g |
The table demonstrates division. It does not establish that a 500 or 960 g batch fits an AeroPress, V60, French press or any other vessel, or that the original brew time stays valid. Split batches or follow the exact model's capacity instructions.
Concentrate and dilution are two calculations
First brew and filter following the refrigerated cold-brew guide. Grounds retain liquid, so 480 g extraction water does not promise 480 ml filtered concentrate.
For a separate dilution example, take 200 ml measured filtered concentrate. At 1:1 concentrate : added water, add 200 ml water for a nominal 400 ml drink. At 1:2, add 400 ml for 600 ml. Those are volume-planning examples, not measured caffeine or flavour strength. Use the cold-brew calculator for measured concentrate or multiple servings. Milk and storage conditions require the guide's separate limits.
Weighing and adjusting
A tablespoon cannot represent a fixed coffee mass across grinds, roasts and packing. Weighing makes the input reproducible; it does not itself prove extraction quality.
At fixed 240 g filter water, 1:15 uses 16 g coffee, 1:16 uses 15 g, and 1:17 uses about 14.1 g. These are dose changes, not a caffeine measurement. If flavour is balanced but the drink is too light, compare a tighter ratio. If it is sharp, harsh or draining unusually, also check grind, filter and flow. Taste alone does not establish under- or over-extraction. Keep the other inputs fixed and record the comparison.
Common questions
Is 1:16 the best ratio for every coffee? No. It is a filter starting point. Use your method's recipe and adjust one variable, keeping a version you can repeat.
How much coffee for four cups? If “cup” means the calculator's 240 ml input-water unit, four units are 960 ml; at 1:16 use 60 g. For four finished drinks, account for retained water and vessel capacity rather than assuming 960 ml input fills all four mugs.
Why is less coffee 1:17 rather than 1:15? The denominator is the water per gram of coffee. With fixed water, a larger denominator gives a smaller dose.
Can I scale the brewing time with the water? Not by simple multiplication. Bed depth, filter, flow and device capacity matter. The V60 calculator scales pour weights; its timer remains a starting schedule for the original recipe.
Is this a storage or caffeine calculator? No. See the method-specific handling guidance and the caffeine calculator's serving assumptions for those separate questions.
Sources and limits
SCA / UC Davis brewing-chart research (opens in a new tab), definitions of TDS and extraction yield, separates beverage concentration from extraction. It does not validate our recipes or home tests. The tables above are arithmetic from the site's calculator, with method limits from the linked guides. See our editorial method; no physical brew testing or universal “golden cup” claim is implied.