Pour Over Coffee Ratio Calculator

Calculator

Calculation mode

Main input value

Use total water, coffee grams, or desired yield.

Water ratio per 1 g coffee

Example: enter 16 for a 1:16 recipe.

Servings

Cup size in grams or ml

Bypass water in grams or ml

Bloom multiplier

Common bloom water is two to three times coffee dose.

Absorption rate

Use grams of water held per gram of coffee.

Extra dripper retention loss

Extraction yield percent

Scale rounding step

Dripper or brewer note

Output units

Example Data Table

Use case	Coffee	Brew water	Ratio	Bloom	Estimated yield
Single cup	15 g	240 g/ml	1:16	45 g/ml	208.5 g/ml
Large mug	20 g	320 g/ml	1:16	60 g/ml	278 g/ml
Two cups	30 g	500 g/ml	1:16.67	90 g/ml	437 g/ml
Strong brew	25 g	375 g/ml	1:15	75 g/ml	322.5 g/ml

Formula Used

Brew water = coffee dose x ratio.

Coffee dose from water = brew water / ratio.

Desired yield mode = coffee dose x (ratio - absorption rate) + bypass water - retention loss.

Coffee dose from desired yield = (desired yield - bypass water + retention loss) / (ratio - absorption rate).

Bloom water = coffee dose x bloom multiplier.

Main pour water = brew water - bloom water.

Expected beverage yield = total water - absorbed water - retention loss.

Estimated TDS = dissolved coffee solids / beverage yield x 100.

How To Use This Calculator

Choose the calculation mode that matches your starting point.
Enter the main value in grams or milliliters.
Set your preferred water ratio per gram of coffee.
Add serving details when using serving based planning.
Adjust bloom, bypass, absorption, and retention options.
Press Calculate to view results above the form.
Use CSV or PDF buttons to save the recipe.

Better Pour Over Planning

A pour over recipe looks simple. Coffee, water, time, and grind meet in one dripper. Yet small ratio changes can shift body, sweetness, and clarity. This calculator turns those changes into measured grams. It helps you plan one cup, a carafe, or a test batch.

Why Ratio Matters

The brew ratio compares water to dry coffee. A 1:16 recipe uses sixteen water grams per coffee gram. Lower ratios taste heavier. Higher ratios taste lighter. The best setting depends on roast level and taste. Filter style matters as well. Light roasts may need more water or finer grinding. Dark roasts may taste better with less water.

Advanced Recipe Control

Good recipes also include bloom water and expected yield. Bloom water wets fresh grounds first. It helps release trapped gas. Bypass water is added after brewing. It can soften strength without extending contact time. Absorption loss matters too. Grounds hold some water after draining. This tool estimates that loss with a grams per gram setting.

Reading The Output

The result shows coffee dose, brew water, total water, bloom amount, main pour water, expected beverage yield, and estimated strength. These values make a recipe easier to repeat. They also help you compare several ratios before wasting beans. Export buttons let you save the current plan for notes, guides, or training sheets.

Practical Brewing Notes

Use filtered water when possible. Weigh the coffee and water. Start with a medium grind. Pour slowly, and keep the bed level. If the cup tastes sour, grind finer or use hotter water. If it tastes harsh, grind coarser or use less water. Change one variable at a time. Keep notes after every brew. Better coffee comes from steady records and calm tasting.

Common Adjustments

Use a tighter ratio for milk drinks. Use a wider ratio for delicate flavors. Raise bloom water for very fresh beans. Lower it when the dripper stalls. Increase absorption for coarse beds and deep filters. Reduce it for fast draining flat brewers. Small entries can reveal clear brewing patterns.

Testing With Examples

Try the sample table first. It shows common ratios and cup sizes. Then copy one row into the form. This step checks your settings before your first brew.

FAQs

What is a good pour over coffee ratio?

A common starting ratio is 1:16. That means one gram of coffee for sixteen grams of water. Use 1:15 for a stronger cup. Use 1:17 for a lighter cup.

Should I measure water in grams or milliliters?

For brewing, grams and milliliters are close enough for water. A scale gives better repeatability. Use grams for both coffee and water when possible.

What does bloom multiplier mean?

Bloom multiplier sets the first pour amount. A value of three uses three grams of bloom water for each gram of coffee. Fresh coffee often benefits from a larger bloom.

Why is expected yield lower than total water?

Ground coffee holds water after brewing. Filters and drippers may also retain some liquid. The calculator subtracts absorption and retention to estimate drinkable coffee.

Can I use this for a Chemex recipe?

Yes. Enter Chemex as the dripper note. Use your preferred ratio and serving size. Larger brewers may need a coarser grind and a slower pouring plan.

What is bypass water?

Bypass water is added after brewing. It dilutes the finished cup without running through the coffee bed. It can help control strength and bitterness.

What extraction yield should I enter?

Many pour over recipes sit near eighteen to twenty two percent. Use twenty percent as a practical estimate. Change it if you have refractometer data.

Can I download my results?

Yes. Use the CSV button for spreadsheet records. Use the PDF button for a simple printable recipe sheet. Both downloads use the current form values.