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Coffee & Café

Cold Brew Coffee Calculator

Calculate the exact coffee and water quantities for your cold brew batch. Covers standard (1:8) and concentrate (1:4) ratios, any batch size, and steep time guidance.

Updated: 21 May 2026
No registration Instant calculation Data stays in browser

Cold brew recipe

Coffee100 g
Cold water1,000 ml
Ratio1:10
ConcentrationMedio concentrato (diluire 1:0.5)
Steeping hours16 h
Extraction noteTempo ottimale

Cold brew: coarse ground coffee (1000+ μm) + cold water 12-24 h in the fridge. Filter with paper or cloth. The 1:8 concentrate keeps 7 days in the fridge and can be diluted on demand with water, ice or milk.

323 persone trovano utile questo calcolatore

Cold Brew Formula

// Standard cold brew (1:8 ratio)
coffee_g = total_water_ml ÷ 8
water_ml = coffee_g × 8

// Concentrate (1:4 ratio) — dilute 1:1 before serving
coffee_g = total_water_ml ÷ 4
water_ml = coffee_g × 4

// Example: 1 litre ready-to-drink cold brew
coffee_g = 1000 ÷ 8 = 125 g
water_ml = 125 × 8 = 1000 ml

// Example: 1 litre concentrate (makes ~2L after diluting)
coffee_g = 1000 ÷ 4 = 250 g
water_ml = 250 × 4 = 1000 ml

// Steep times
Room temperature (18–22°C): 12–16 hours
Refrigerator (4°C):         18–24 hours

// Grind size: Extra-coarse (900–1200 microns)

Batch Sizing Examples

  • 500 ml cold brew (1:8): 62.5 g coffee + 500 ml water
  • 1 litre cold brew (1:8): 125 g coffee + 1,000 ml water
  • 2 litres cold brew (1:8): 250 g coffee + 2,000 ml water
  • 1 litre concentrate (1:4): 250 g coffee + 1,000 ml water → yields ~2 L after dilution
  • Italian bar note: Cold brew is a growing trend in Italian specialty bars, but caffè shakerato (espresso shaken with ice) remains the classic Italian cold coffee — served in a martini glass, no milk, just sweetened espresso and ice.
Risposte rapide

Direct answers

What is the best ratio for cold brew coffee?
The standard cold brew ratio is 1:8 — 1 part coffee to 8 parts cold water by weight (e.g. 100 g coffee + 800 g / 800 ml water). This produces a ready-to-drink cold brew of normal strength. For a concentrate intended to be diluted before serving, use 1:4 (100 g coffee + 400 ml water).
How long do you steep cold brew?
At room temperature (18–22°C): 12–16 hours. In the refrigerator (4°C): 18–24 hours. Steeping longer produces a stronger, more bitter concentrate; less time gives a lighter result. Cold brew should always be strained before serving.
Is cold brew the same as Italian caffè freddo?
No. Italian caffè freddo (cold coffee) is typically a hot espresso that has been chilled or a shakerato — espresso shaken with ice until frothy and served over ice. Cold brew is a fundamentally different method: coffee is never heated and is steeped in cold water for hours. Cold brew is a more recent trend in Italian bars, though caffè shakerato has been a summer staple for decades.
What grind size should I use for cold brew?
Cold brew requires a very coarse grind — similar to coarsely ground sea salt. An extra-coarse grind (900–1200 microns) prevents over-extraction during the long steep time and makes filtering easier. Using a fine grind produces a murky, bitter result.
How long does cold brew keep in the fridge?
Properly filtered cold brew keeps for 7–14 days in a sealed container in the refrigerator. Cold brew concentrate keeps slightly longer due to its lower water activity. Always strain thoroughly — coffee grounds left in the liquid accelerate deterioration.
Quick answers

Frequently Asked Questions

What is the best ratio for cold brew coffee?

The standard cold brew ratio is 1:8 — 1 part coffee to 8 parts cold water by weight (e.g. 100 g coffee + 800 g / 800 ml water). This produces a ready-to-drink cold brew of normal strength. For a concentrate intended to be diluted before serving, use 1:4 (100 g coffee + 400 ml water).

How long do you steep cold brew?

At room temperature (18–22°C): 12–16 hours. In the refrigerator (4°C): 18–24 hours. Steeping longer produces a stronger, more bitter concentrate; less time gives a lighter result. Cold brew should always be strained before serving.

Is cold brew the same as Italian caffè freddo?

No. Italian caffè freddo (cold coffee) is typically a hot espresso that has been chilled or a shakerato — espresso shaken with ice until frothy and served over ice. Cold brew is a fundamentally different method: coffee is never heated and is steeped in cold water for hours. Cold brew is a more recent trend in Italian bars, though caffè shakerato has been a summer staple for decades.

What grind size should I use for cold brew?

Cold brew requires a very coarse grind — similar to coarsely ground sea salt. An extra-coarse grind (900–1200 microns) prevents over-extraction during the long steep time and makes filtering easier. Using a fine grind produces a murky, bitter result.

How long does cold brew keep in the fridge?

Properly filtered cold brew keeps for 7–14 days in a sealed container in the refrigerator. Cold brew concentrate keeps slightly longer due to its lower water activity. Always strain thoroughly — coffee grounds left in the liquid accelerate deterioration.

Italian version: Calcola cold brew

Cold brew recipe

Coffee100 g
Cold water1,000 ml
Ratio1:10
ConcentrationMedio concentrato (diluire 1:0.5)
Steeping hours16 h
Extraction noteTempo ottimale

Cold brew: coarse ground coffee (1000+ μm) + cold water 12-24 h in the fridge. Filter with paper or cloth. The 1:8 concentrate keeps 7 days in the fridge and can be diluted on demand with water, ice or milk.

323 persone trovano utile questo calcolatore

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