Free · no sign-up
Free Coffee Brewing Tools
Three tools that work in your own grinder's numbers: convert a whole recipe, move one setting between grinders, or work out dose and water. No account needed.
Recipe Converter
Paste a recipe written for someone else’s grinder — dose, water, grind setting, time — and get it back in your own numbers, rescaled to the dose you are brewing.
Open Tool →Grind Size Converter
Translate grind settings between 78 popular grinders instantly. Switch from a Comandante to a 1Zpresso, Baratza to a Fellow Ode — no guesswork.
Open Tool →Brew Ratio Calculator
Calculate the perfect coffee-to-water ratio for any brew method. Dial in V60, Chemex, AeroPress, French press, espresso, and cold brew.
Open Tool →Everything you need to brew better
Recipe Converter
- Reads a whole recipe, not one field at a time
- Converts the grind setting onto your grinder’s dial
- Rescales the ratio to whatever dose you are actually using
- Says when a recipe is ambiguous instead of guessing
Grind Size Converter
- Covers 78 grinders from Baratza, Comandante, 1Zpresso, Fellow, and more
- Convert from any grinder or from brew method (espresso, pour over, French press)
- Visual grind scale showing fine to coarse on a 0–100 index
- Quick reference table comparing all grinders at once
Brew Ratio Calculator
- Pre-set ratios for 7 popular brew methods
- Adjustable ratio slider for fine-tuning (1:15 to 1:18)
- Instant results: dose, water, grind index, and brew time
- Brew method reference guide with recommended parameters
Built for coffee people, by coffee people
No sign-up required
Every tool works instantly in your browser. No account, no paywall, no ads.
Real calibration data
Grind conversions are based on actual grinder measurements — not rough estimates from forums.
Works on any device
Fully responsive. Use at the kitchen counter, coffee bar, or anywhere you brew.
Frequently asked questions
Are these coffee tools really free?
Yes — every tool is free and none of them ask you to make an account. They run on the same anchor curves as the 78 grinder charts, so the number you get here is the number on the page for your model.
How does the grind size converter work?
Our grind converter uses a universal 0–100 grind index that maps every grinder's settings to a shared scale. We've calibrated 78 grinders by mapping their espresso, filter, and coarse anchor points. Select your source grinder and setting, choose a target grinder, and get an instant conversion.
What brew ratios should I use?
It depends on the method. Pour over and drip typically use 1:15 to 1:17 (coffee to water by weight). Espresso runs around 1:2. French press is usually 1:15. Cold brew concentrate goes as strong as 1:5. Our brew calculator has pre-set ratios for each method that you can fine-tune.
Can I use these tools on my phone?
Absolutely. Every tool is fully responsive and works on any device. For the best experience, download the BrewMark app — it has every tool built in plus AI-powered recipe adaptation for your exact equipment.
How accurate is the grind size conversion?
Our conversions are based on real calibration data from each grinder, mapped to anchor points (espresso, filter, coarse). Results are a reliable starting point — you may need to adjust by one or two clicks depending on your beans, altitude, and water chemistry.
Hear about new grinders and guides
Occasional notes when we add grinders, guides or tools. No promises about what is coming next.
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All tools built into the app
The BrewMark app has every tool built in — plus AI-powered brew recipes tailored to your exact grinder and taste preferences.