The ratio of coffee to water when brewing coffee. The American SCAA Fine Coffee Association sets the brewing ratio.

(Source: Google)

Standard brewing ratio

Number of cups of coffee

Cups of

Coffee

Coffee to BE used

Water to BE used

by weight

BY WEIGHT

by gauge

BY MEASURE

Ounces

Grams

teaspoon Tea

Spoons

Table spoon

Spoons

Cups

Coffee Fluids (oz)

Fluid

Ounces

Number of cups

pints

Quarters

1/2 gallon 1/2 GAL

cc

(milliliters)

Litter

1

0.38

10.6

6

2

1/8

8

1

1/2

1/4

1/8

237

0.24

2

0.75

21.3

12

4

1/4

16

2

1

1/2

1/4

473

0.47

3

1.13

31.9

18

6

3/8

24

3

1 1/2

3/4

3/8

710

0.71

4

1.50

42.5

24

8

1/2

32

4

2

1

1/2

947

0.95

5

1.88

53.2

30

10

5/8

40

5

2 1/2

1 1/4

5/8

1183

1.18

6

2.25

63.8

36

12

3/4

48

6

3

1 1/2

3/4

1420

1.42

7

2.63

74.4

42

14

7/8

56

7

3 1/2

1 3/4

7/8

1656

1.66

8

3.00

85.1

48

16

1

64

8

4

2

1

1893

1.89

9

3.38

95.7

54

18

1 1/8

72

9

4 1/2

2 1/4

1 1/8

2130

2.13

10

3.75

106.3

60

20

1 1/4

80

10

5

2 1/2

1 1/4

2366

2.37

11

4.13

116.9

66

22

1 3/8

88

11

5 1/2

2 3/4

1 3/8

2603

2.60

12

4.50

127.6

72

24

1 1/2

96

12

6

3

1 1/2

2840

2.84

If you know the amount of ground coffee, multiply it by a factor of 21.33 to know how many ounces of water you need (0.046875 is the inverse factor), multiply it by a factor of 22.2593 to get how many milliliters of water you need (0.04493 is the inverse factor);

For example, 1.2 ounces of ground coffee multiplied by 21.33 would require 25.6 ounces of water;92.6 grams of ground coffee would require 2061CCs (2.06 liters) of water. Multiply the known amount of water by the inverse factor to obtain the required amount of coffee powder.

Connoisseur's Brewing Ratio

Cups of

Coffee

Coffee to BE used

Water to BE used

BY WEIGHT

BY MEASURE

Ounces

Grams

Tea

Spoons

Table

Spoons

Cups

Fluid

Ounces

Cups

Pints

Quarts

1/2 Gal

CCs

(milliliters)

Liters

1

0.38

10.6

6

2

1/8

6

3/4

3/8

3/16

3/32

177

0.18

2

0.75

21.3

12

4

1/4

12

1 1/2

3/4

3/8

3/16

355

0.35

3

1.13

31.9

18

6

3/8

18

2 1/4

1 1/8

9/16

9/32

532

0.53

4

1.50

42.5

24

8

1/2

24

3

1 1/2

3/4

3/8

710

0.71

5

1.88

53.2

30

10

5/8

30

3 3/4

1 7/8

15/16

15/32

887

0.89

6

2.25

63.8

36

12

3/4

36

4 1/2

2 1/4

1 1/8

9/16

1065

1.06

7

2.63

74.4

42

14

7/8

42

5 1/4

2 5/8

1 5/16

21/32

1242

1.24

8

3.00

85.1

48

16

1

48

6

3

1 1/2

3/4

1420

1.42

9

3.38

95.7

54

18

1 1/8

54

6 3/4

3 3/8

1 11/16

27/32

1597

1.60

10

3.75

106.3

60

20

1 1/4

60

7 1/2

3 3/4

1 7/8

15/16

1775

1.77

11

4.13

116.9

66

22

1 3/8

66

8 1/4

4 1/8

2 1/16

1 1/32

1952

1.95

twelve

4.50

127.6

seventy-two

twenty-four

1 1/2

seventy-two

nine

4 1/2

2 1/4

1 1/8

2130

2.13

If you know the amount of coffee powder, times the coefficient 16, you know how many ounces of water you need (0.0625 is the inverse coefficient), multiplied by the coefficient 16.6945, you get how many milliliters of water you need (0.04493 is the inverse coefficient).

For example, if you have 1.2oz coffee powder multiplied by 16.0, you need 19.2oz water; 92.6g coffee powder requires 1562CCs (1.56L) water. The amount of coffee powder required can be obtained by multiplying the inverse coefficient with the known amount of water.

Comparing the two tables, it is not difficult to find that the so-called brewing of enthusiasts is just a little higher in concentration and heavier in taste.

To put it simply, under normal circumstances, one serving of powder (10 grams) is washed into about 22 parts (220 grams) of water, while enthusiasts use one part of powder (10 grams) to flush about 160,17 parts of water (160,170g water).

The picture below is the coffee brewing rate chart of SCAA. If you have the TDS gadget and find that the value of coffee is within the yellow box in the middle of the table below, the coffee wine is relatively balanced and delicious. In this table, the Abscissa is the coffee extraction rate, that is, the ratio of the coffee ingredients extracted from the coffee beans (powder) to the coffee beans (portions). The ordinate represents the ratio of the extracted coffee ingredients (special hint: this is not the weight of the coffee powder) to the total coffee liquid, also known as concentration. The conclusion of SCAA's long-term observation and research is that when the extraction rate of coffee is 180.22% and the concentration is 1.15 ~ 1.35% (that is, the range of yellow box), the taste of coffee is the best (balanced and delicious).

(source: scaa.org)

The above data need special equipment to test, but as long as we pay attention to a few points, the test data of the coffee is basically within the above range.

1. The ratio of coffee powder to water used (1) 15: 20, usually trial-made at 1:18, adjusted according to the taste.)

two。 The thickness of coffee grinding (sugar thickness, about 0.86 mm)

two。 The contact time between coffee and water (the soaking time of coffee powder in water is about three minutes)

4. The temperature of the water (92-96 degrees).

See: gold cup extraction and master frequency

Source: Blackbearcoffee compilation: Huang Wei reprint must indicate the source and the original link

[supplement of December 2, 2012]:

The gold cup extraction criterion of dripping coffee is summarized and summarized on the basis of long-term practice. In the field of coffee, the research of SCAE and SCAA is the most thorough and authoritative. Therefore, for a layman like me who lacks the spirit, ability and conditions to delve into it, borrowlism is the simplest solution. The so-called "golden cup extraction criterion" is basically the content of the red font above. It's not hard to remember. Looking back at this blog post, you only need to look at the red font section.

Other reference materials:

The SCAE Gold Cup Programme:

The Gold Cup Programme is an European drive by the SCAE to improve the standard of filter coffee consumed in the marketplace. It ensures a WIN for the Coffee Roaster, a WIN for the Restaurateur and a WIN for the consumer.

SCAE Gold Cup = Win-Win-Win

The SCAE's Gold Cup programme promotes a better, measurable standard in filter coffee. This will be achieved by recognising an internationally respected set of rules on brewing filter coffee.

The Gold Cup sets minimum standards for coffee to water ratio, brewing temperature and holding time, and optimum standards for coffee extraction and strength.

How the Gold Cup works:

The SCAE Gold Cup uses the industry to monitor itself, backed up by incontrovertible and well-researched scientific data to ensure the integrity of the Gold Cup as a quality standard is objectively maintained.

THE ART OF BREWING-WHAT IS THE PERFECT CUP?

There are acres of paper filled with data on coffee, coffee origins, coffee roasting and coffee flavour profiles. All these things have huge importance on what goes in the cup.

As important is the alchemy or art of turning a coffee bean and water into a perfectly extracted cup of coffee.

The Art of Brewing is effectively taking between 18 and 22% of a coffee bean and extracting it into approx 1.3% of the finished beverage.

The most important aspect of 'the perfect cup' is the balance between strength of the beverage and correct extraction of the bean.

THE SCIENCE OF BREWING-HOW TO GET THE PERFECT CUP

Filter coffee as defined by the SCAE Gold Cup standard-

'A ratio of 1 litre of fresh water brewed at 92 °to 96 °C through 50 to 65g of freshly ground coffee and filtered through an oxygen-bleached filter paper to extract between 18% and 22% of solids from the coffee.'

Scientifically, there are many aspects which influence the quality of filter coffee, most significantly:

1. Grammage-How much coffee we use per litre of water.

2. Grind-How coarse or fine we grind the roasted coffee bean

3. Contact Time-How long the ground beans and water are in contact to extract the brew.

4. Temperature-How consistent and what temperature the water is at brew time.

Compilation: Huang Wei must indicate the source and the original link when reprinted.