Pour Over Coffee Ratio: The 1:15 to 1:17 Rule Explained Simply

The pour over ratio is the weight of coffee to the weight of water. It is the secret behind the cleanest, brightest cup of coffee you can make at home. Most pour over recipes use a 1:15 to 1:17 range, but the details matter more than the number. This guide breaks down the ratio for V60, Chemex, and Kalita Wave, plus the exact bloom timing and pulse pour schedule you need.

By Saran Reddy | Published: 22 April 2026 | Last updated: 6 October 2026. Every ratio and gram figure re-checked that day.

What Is the Best Pour Over Ratio?

The best pour over ratio to start with is 1:16. That is 15 grams of coffee for every 240 grams of water. This gives you a clean, balanced cup with good clarity. Use 1:15 for a stronger cup and 1:17 for a lighter one. Then adjust for your beans.

How does this compare with the experts? The Specialty Coffee Association tests home coffee brewers at 55 grams of coffee per 1 kilogram of water (SCA Standard 310-2021). That is about 1:18. Coffee expert James Hoffmann uses 60 grams per litre in his V60 method, which is about 1:17 (1:16.7). He says 55 to 70 grams per litre is a matter of taste, not right or wrong (Hoffmann, The Ultimate V60 Technique). So 1:15 to 1:17 sits on the stronger side of that range.

The 1:15 to 1:17 range covers nearly every pour over style:

Dripper	Ratio	Coffee	Water	Grind	Brew Time
Hario V60	1:16	15g	240g	Medium-fine	2:30-3:00
Chemex	1:17	30g	510g	Medium-coarse	3:30-4:30
Kalita Wave	1:16	20g	320g	Medium	3:00-4:00

Want it stronger? Drop to 1:15. Want it lighter and more tea-like? Go to 1:17. Each point changes the flavor more than you expect.

How Much Water for 15g of Coffee? 1:15, 1:16 and 1:17 in Grams

For 15 grams of coffee, use 225 grams of water at 1:15, 240 grams at 1:16, or 255 grams at 1:17. To find the water, multiply the coffee weight by the second number of the ratio. For example, 15 x 16 = 240. On a scale, 1 gram of water is about 1 ml.

Coffee	1:15 ratio (stronger)	1:16 ratio (balanced)	1:17 ratio (lighter)
12g	180g water	192g water	204g water
15g	225g water	240g water	255g water
20g	300g water	320g water	340g water
30g	450g water	480g water	510g water

A 1:15 ratio means 1 gram of coffee for every 15 grams of water. A 1:17 ratio means 1 gram of coffee for every 17 grams of water. The bigger the second number, the weaker the cup. For other brew methods, see our coffee to water ratio chart.

What Is the Bloom and Why Does It Matter?

The bloom is the first pour that releases trapped CO2 gas from fresh coffee grounds. Without it, gas bubbles push water away and block even extraction.

Here is how to bloom properly:

1. Place your dripper on the scale with the filter and grounds inside.
2. Press tare to zero the display.
3. Start the timer on your scale.
4. Pour water equal to 2 times the coffee weight. For 15g of coffee, pour 30g of water.
5. Make sure all the grounds are wet. Give a gentle swirl if needed.
6. Wait 30 to 45 seconds. You will see the grounds puff up and bubble. That is CO2 escaping. James Hoffmann waits up to 45 seconds and no longer.
7. After the bloom time, start your main pour.

A big, bubbly bloom means your coffee still holds a lot of gas, which is a sign of fresh beans. A flat bloom with few bubbles usually means the beans have lost most of their gas, often because they are old or were ground long ago. The bloom affects every pour over method, from V60 to Chemex to Kalita Wave. Read more in our guide to coffee bloom timing.

How Do You Do the Pulse Pour Technique?

Pulse pouring means adding water in small batches (about 50g at a time) with pauses between each pour. This gives the water time to drain through the coffee bed before the next batch arrives. Here is the full schedule for a 15g/240g V60 brew (1:16):

Time	Action	Total Water (g)
0:00	Bloom pour -- add 30g water	30g
0:45	First pour -- add 70g water in circles	100g
1:15	Second pour -- add 50g water	150g
1:45	Third pour -- add 50g water	200g
2:15	Final pour -- add 40g water	240g
2:30-3:00	Let it drain completely	Done

A coffee scale with a built-in timer, like the InstaCuppa Rechargeable Coffee Scale, shows weight and time on the same screen. You can watch grams climb while tracking your pour intervals.

How Does the Chemex Ratio Differ from V60?

Chemex recipes often use a weaker ratio (1:17) and a coarser grind because its thick paper filter slows drainage. The V60 has a thin filter and a large drain hole, so water flows through fast. The Chemex bonded filter is folded so that three layers sit over the pouring spout. Chemex says the filter removes fats and sediments that other filters leave behind (Chemex). The result is a very clean cup, and many people like it a little lighter.

The ratio sets strength. The grind sets how fast the water drains. If a Chemex brew takes much longer than 5 minutes and tastes bitter, grind coarser. A medium-coarse grind usually lands near 4 minutes. You can brew a Chemex at 1:16 or 1:17. Pick the strength you like.

What Is the James Hoffmann V60 Technique?

James Hoffmann uses 60 grams of coffee per litre of water, about 1:17, and pours the water in two quick phases after a short bloom. In his video he brews 30 grams of coffee with 500 grams of water, enough for two people (Hoffmann, The Ultimate V60 Technique).

His key steps for 30 grams of coffee and 500 grams of water:

1. Bloom with 2 grams of water per gram of coffee: 60 grams of water. He says never use more than 3 to 1.
2. Swirl the brewer until the slurry looks even. Let it bloom for up to 45 seconds.
3. Pour to 60% of the water, 300 grams in total, by 1:15 on the timer.
4. Pour gently to 100%, 500 grams, by 1:45.
5. Stir once each way with a spoon, let it drain a little, then give one final swirl so the coffee bed ends flat.

He uses water as hot as possible for light roasts. For dark roasts he says it is fine to wait 15 to 25 seconds after the boil. He does not change the ratio to fix taste. He changes the grind: go finer if the cup tastes hollow or sour, and come back a little coarser once it turns bitter or harsh.

Both pulse and continuous techniques work well. Many people find pulse pours easier to control. Try both and see which you prefer.

How Do You Adjust the Pour Over Ratio for Taste?

Change the coffee amount while keeping the water the same. Here is a quick guide:

Taste Goal	Ratio	Coffee for 250g Water
Bold and intense	1:15	17g (16.7g)
Balanced (start here)	1:16	16g (15.6g)
Light and clean	1:17	15g (14.7g)

If adjusting the ratio does not fix the taste, check your grind size (see our pour over grinder guide). Too fine and the coffee drains slowly, making it bitter. Too coarse and it drains fast, making it sour and watery.

What Mistakes Do Beginners Make with Pour Over?

Five common mistakes ruin most pour over brews. Here is each one and the fix:

• Pouring too fast. Dumping all the water at once floods the coffee bed and creates channels. Slow down. Use a gooseneck kettle for control.
• Skipping the bloom. If you pour all the water without blooming first, CO2 gas pushes water away from the grounds. You get an uneven, weak cup.
• Not using a scale. Guessing the coffee and water amounts leads to a different cup every morning. Weigh both for the same great taste each time.
• Getting the water temperature wrong. Water that is too cool pulls too little flavor, so the cup tastes thin. The SCA home brewer standard asks for 90 to 96 degrees Celsius. For light roasts, water just off the boil works well. For dark roasts, let the kettle sit for 15 to 25 seconds after boiling.
• Wrong grind size for your dripper. V60 needs medium-fine. Chemex needs medium-coarse. Using French press grind in a V60 gives you weak, watery coffee.

Does Water Temperature Affect the Pour Over Ratio?

Water temperature changes how much flavor the water pulls out, not the ratio itself. Hotter water extracts faster. The SCA home brewer standard asks for the coffee and water to stay between 90 and 96 degrees Celsius. In that range, the standard 1:16 ratio works well (SCA Standard 310-2021).

Light roasts are dense and harder to extract, so they like the hottest water. Dark roasts extract easily, so slightly cooler water is fine. James Hoffmann brewed the same coffee side by side at 95 and 85 degrees. The cooler brew took 30 seconds longer to drain and tasted worse (Hoffmann).

The ratio and temperature work together. If the cup still tastes off at the right temperature, change the grind first, then the ratio.

How Do You Make Pour Over for Two People?

Double everything. Use 30g of coffee and 480g of water at 1:16, or 510g at 1:17. A larger V60 (size 02 or 03) handles this volume well. A Chemex suits bigger batches. The 6-cup Chemex holds 30 ounces, about 890 ml, and the 8-cup holds 40 ounces, about 1.2 litres (Chemex 6-cup, Chemex 8-cup).

When brewing more coffee, the total brew time gets longer. For 30g in a V60, expect 3:00 to 4:00 instead of 2:30 to 3:00. You may need to grind slightly coarser to keep the brew time in range. If it takes longer than 4:00, the coffee will taste bitter. Keep notes on your timing so you can repeat what works.

Here is a quick scaling table at 1:16 (coffee x 16 = water):

People	Coffee	Water	Dripper Size
1	15g	240g	V60 01 or 02
2	30g	480g	V60 02 or Chemex
3-4	45-60g	720-960g	Chemex 6-cup or 8-cup

Frequently Asked Questions

What is the best pour over ratio for beginners?

Start with 1:16 (15g coffee to 240g water). It is the most balanced and forgiving ratio for any dripper.

What does a 1:15 or 1:17 coffee ratio mean?

A 1:15 ratio means 1 gram of coffee for every 15 grams of water, so 15g of coffee needs 225g of water. A 1:17 ratio means 15g of coffee needs 255g of water. 1:15 makes a stronger cup and 1:17 a lighter one.

Do I need a gooseneck kettle for pour over?

No, but it helps. A gooseneck kettle gives you better control over pour speed and placement. James Hoffmann says a regular electric kettle is absolutely fine for his V60 method. Just pour slowly. See our gooseneck kettle price guide if you want one.

How long should pour over coffee take?

A common target is 2:30 to 3:30 for a V60 with 15g of coffee. Chemex often takes 3:30 to 4:30. If it takes longer, grind coarser. If shorter, grind finer.

Why does my pour over taste weak?

Common causes: too coarse a grind, not enough coffee (ratio above 1:17), or water temperature too low (below 90 degrees).

Can I use the same ratio for hot and iced pour over?

Keep the same total, but swap part of the hot water for ice. Place the ice in the server and brew hot coffee directly onto it (the Japanese method). For example, for 30g of coffee at 1:16 (480g total), brew with 300g of hot water onto 180g of ice. The hot part alone is strong, about 1:10, and the melting ice brings it close to 1:16.

Related reads:

• Coffee to Water Ratio Chart: Exact Grams for Every Brewing Method
• Coffee Bloom: What It Is, Why It Matters, and How to Time It
• Coffee Scale for Pour Over: Why Precision Weighing Matters