The AeroPress Coffee Calculator determines the optimal coffee-to-water ratio, grind size, water temperature, and brew time for any AeroPress recipe. Covers standard and inverted methods with dose scaling — helping you dial in the perfect AeroPress brew every time.
90
ml
45
sec
20
sec
81
ml
185
°F
65
sec
90
ml
45
sec
20
sec
81
ml
185
°F
65
sec
The calculator for AeroPress coffee brewing determines the optimal coffee dose, water volume, grind size, water temperature, and brew time for any AeroPress method. The AeroPress, designed by Alan Adler and launched in 2005, uses air pressure to produce a concentrated, smooth, low-acidity brew in under 2 minutes — and its flexibility makes precise ratios more important than with almost any other brewing method.
The AeroPress World Championship has produced a remarkably consistent set of winning parameters that define the "standard" approach:
The coffee-to-water ratio calculator applies these ratios to any brew method; the AeroPress calculator optimizes them specifically for pressure-assisted extraction.
The AeroPress can be used in two orientations, each producing different extraction characteristics:
The inverted method dominates AeroPress competition because it gives complete control over steep time. However, it requires care when flipping the device — use a stable, heat-resistant cup. Use this online calculator to generate optimized parameters for either method based on your preferred strength and cup size.
Grind size is the primary variable controlling extraction rate in AeroPress brewing. Finer grinds extract faster (and can over-extract into bitterness); coarser grinds extract slower (and can under-extract into sourness). The pressure from the AeroPress plunger accelerates extraction compared to drip brewing, which is why AeroPress grind size sits between filter and espresso:
The coffee grind size calculator provides grind recommendations across all brewing methods. The espresso extraction calculator covers the fine-end extreme of coffee grind spectrum.
AeroPress performs unusually well at lower water temperatures (80–85°C) compared to most brewing methods that require 90–96°C. The pressure-assisted extraction compensates for reduced thermal energy, and the lower temperature produces a naturally sweeter, less bitter cup — an advantage when working with darker roasts or lower-quality beans. Cold brew concentrate can even be made in the AeroPress by extending steep time to 10–20 minutes at room temperature. The cold brew ratio calculator and coffee calculators category cover the full spectrum of coffee brewing optimization.
The calculator maps each recipe style to predefined ratios and timing benchmarks. Water = Coffee (g) × Ratio. Brew time and press duration are provided as baseline targets from specialty coffee best practices and World AeroPress Championship recipes. Yield is estimated at 90% of water volume (accounting for ~10% absorbed by grounds). Water temperature is user-selected and carried through directly.
For espresso-style results: use a fine grind and press hard and fast. For filter style: use medium grind and slow, gentle pressure. If the press requires excessive force, grind coarser. If coffee drips through before you press (standard method), add more coffee to create better seal resistance, or use the inverted method. Brew time targets are starting points — the World AeroPress Championship features wildly varied recipes from 45 seconds to 3+ minutes.
Inputs
Results
15g coffee × 12 ratio = 180ml water at 85°C. Add water, stir 10 seconds, wait 80 seconds total, press gently for 30 seconds. Yield: ~162ml. Drink as-is or dilute with 60–80ml hot water.
Inputs
Results
18g coffee, inverted AeroPress, add 216ml water at 80°C. Steep 90 seconds with gentle stir. Flip carefully onto cup and press over 30 seconds. Produces ~194ml of smooth, low-acidity coffee.
The AeroPress uses manual air pressure to accelerate extraction, producing a concentrated, low-acidity cup in under 2 minutes. It is also extremely versatile — it can mimic espresso, pour over, and cold brew (with cold water and long steep) styles. Cleanup takes about 15 seconds.
This is highly debatable. James Hoffmann recommends 85–95°C for most beans. Some AeroPress enthusiasts use boiling water. Lower temperatures (70–80°C) produce sweeter, more mellow cups. Experiment across the range — the AeroPress is very forgiving of temperature variation.
For the standard method, a medium-fine grind (between espresso and drip) is a good starting point. Finer for espresso-style, medium for filter style. The inverted method often uses a medium grind. Adjust based on brew time and taste.
In the inverted method, the AeroPress is flipped with the plunger at the bottom (not in the brewing position) during steeping. This prevents any liquid from dripping through until you flip and press. It gives you precise control over steep time and tends to produce a slightly fuller extraction.
Yes — with fine-ground coffee, cold water, and an extended steep time of 12–24 hours (without pressing), the AeroPress can make cold brew. Press gently when ready. The yield is small but intense, and the method is convenient for single servings.
Leaks are usually caused by a worn or misaligned rubber seal. Wet the rubber seal slightly with water before inserting it into the chamber. If the seal is visibly damaged, AeroPress replacement seals are inexpensive and widely available.
A standard AeroPress recipe with 15–20g of coffee typically contains 100–150mg of caffeine, depending on roast level and bean variety. Espresso-style recipes using more coffee per unit of water may contain slightly more caffeine per serving.
Yes — a brief stir (about 10 seconds) after adding water ensures all grounds are wetted evenly. Some recipes call for multiple stirs. Over-stirring can increase extraction and may introduce bitterness, so keep stirs gentle.
Yes. Add loose-leaf tea to the AeroPress, pour hot water at the appropriate temperature for your tea type, steep for the desired time, and press. The filter prevents leaves from passing through, making it a clean and convenient tea brewer.
The standard paper micro-filters produce a clean, bright cup with minimal sediment. Metal reusable filters let more oils and fine particles through, producing a fuller-bodied cup similar to French press. Some brewers use both — a metal filter plus a paper filter for a balance of body and clarity.
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