V60 Brew Ratios - A Guide

V60 Brew Ratio Guide: Finding what works for you

Coffee is one of the most variable drinks you can make at home. Grind size, water temperature, pour technique - it all matters. But if there's one variable that has the most immediate, predictable impact on what ends up in your cup, it's brew ratio.

It is easy to follow a V60 recipe without ever questioning the ratio. Change that, and you unlock a level of control that makes every other adjustment easier to understand.

What is a brew ratio?

A brew ratio is simply the relationship between the amount of coffee you use and the amount of water you brew with, expressed as a ratio. When you see 1:16, it means one gram of coffee for every sixteen grams of water.

Water weight and volume are effectively the same at room temperature; one millilitre of water weighs one gram. Ratios are therefore often expressed in both grams and millilitres interchangeably. A 20g dose at 1:16 means 320ml of water.

Whatever your dose is, multiply it by the second number to get your water volume.

What does the SCA recommend?

The Specialty Coffee Association's Golden Cup standard recommends a brew ratio of around 55 grams of coffee per litre of water, which works out approximately 1:18. This was established as a baseline for producing a balanced, approachable cup that works across a wide range of coffees and brewing equipment.

It's a useful starting point, not a rule. Specialty cafés frequently brew stronger than the Golden Cup standard, and many competition brewers work well below 1:16 when showcasing high-quality beans. The SCA recommendation gives you a good starting point from which you can set a baseline and experiment.

How ratio affects flavour

Ratio is the primary dial for strength and body, and it interacts directly with extraction. Here's what each point on the spectrum tends to produce:

1:15 — Strong and dense. At this ratio you're brewing a concentrated cup with significant body. It can work beautifully with naturally processed coffees that have heavy, syrupy characteristics. The risk is that if your grind isn't well calibrated, any extraction imbalance becomes more obvious in the cup.

1:16 — Strong but balanced. This is the house ratio for many specialty coffee shops. It produces a cup with clear structure, sweetness, and enough concentration to let the coffee's character come through. A good default if you want something noticeably stronger.

1:17 — The SCA sweet spot. Clean, balanced, and approachable. This ratio tends to produce cups that are easy to evaluate. The flavours are present without being pushed, and the body is balanced. A reliable baseline for any new bean you're working with.

1:18 — Lighter and more delicate. This ratio opens up floral and citrus notes particularly well. If you're brewing a washed Ethiopian with jasmine and bergamot characteristics, a slightly higher ratio can bring out those aromatics. The cup will feel lighter in body, more tea-like in texture.

1:20 — Very light. This divides opinion. Some find it revelatory with exceptional light roasts, others find it thin and unsatisfying. Worth trying at least once if you're curious.

How to choose your ratio

There's no universal correct answer, but three questions will get you to a sensible starting point quickly.

First, how strong do you like your coffee? If you typically find filter coffee weak or watery, start at 1:15 or 1:16. If you find strong coffee bitter or heavy, start at 1:17 or 1:18.

Second, what roast level are you working with? Lighter roasts are denser and often need a bit more water to extract properly — a 1:17 or 1:18 frequently works better than 1:15 with a light roast. Darker roasts extract more readily and can handle a stronger ratio without becoming harsh.

Third, what does the roaster recommend? Many specialty roasters include brew guidance on their packaging or website. Their recommendation is based on how they've calibrated that specific coffee but remember that water matters too (where is the roaster based or are they using a water recipe?).

Once you have a starting point, change only the ratio between brews. Everything else grind stays the same. That's the only way to know what the ratio is actually doing.

A worked example

Say you're brewing with 20g of coffee and you want to try 1:16.

20 × 16 = 320ml of water total.

Account for approximately 2 – 2.2 of water absorption by the grounds and you'll have roughly 276-280ml in your cup. If you're brewing for two, scale up to 30g at 1:16 for 480ml of water and around 416ml yield.

The maths is simple but it's easy to lose track of mid-brew. If you want to skip the calculation entirely, the brew calculator in Coffee Rambler AI does it instantly. Enter your dose, select your ratio, and it shows you both the water volume and estimated cup yield before you start.

Common mistakes

Guessing instead of weighing. A tablespoon of coffee can vary by several grams depending on grind size and how it's scooped. Without a scale, your ratio is a guess.

Changing ratio and grind size simultaneously. If you adjust both at once you have no way of knowing which change produced the result. Always isolate variables.

Using the same ratio for every bean. A ratio that works for a washed Kenyan may not suit a natural Brazilian. Start with a baseline and move.

Finding your cup

There is no single correct V60 brew ratio. What there is, is a spectrum and understanding what each point on that spectrum does to flavour gives you control over what ends up in your cup.

Pick a starting point. Brew it three times with the same beans. Taste it honestly. Then move the ratio one step in whichever direction your palate is asking for.

Keep notes as you go. The difference between a 1:16 and a 1:17 can be subtle on paper and obvious in the cup but only if you're paying attention and recording what you find. That's exactly what Coffee Rambler AI is built for: tracking every brew, remembering your preferences, and helping you build genuine expertise one cup at a time. Read more about the Coffee Rambler app here (there is currently a discount for the Enthusiast tier that runs till 30th April 2026).

Try the free brew ratio calculator and diary at rambler.coffee