# How WAC Coffee Dose Changed from 2009 to 2025 Canonical: https://brew.supply/learn/world-aeropress-championship-dose-history Description: See the WAC podium-dose timeline from 2009–2025, including the 2019 30–35 g podium, the 2021 18 g reset, rule evidence, and limits. World AeroPress Championship podium doses changed in stages, not along one steady rise or fall. Available 2009–2015 recipes had a median dose of 17.75 g. The 2016–2019 median rose to 30 g, with all three 2019 podium recipes at 30–35 g. When the championship returned in 2021 under a confirmed 18 g maximum, all three podium recipes used 18 g; the 2021–2025 median remained 18 g. These are descriptive podium records, not proof that dose caused placement or that one period discovered a better recipe. Scope: The historical archive has 46 available podium recipes across 49 indexed positions. Dose is usable for n=45; one available 2009 recipe states a range and stays outside single-value summaries. There was no 2020 championship. Frozen annual rule text was not recovered for every historical year, so observed podium doses and documented maximums remain separate evidence types. ## Key definitions ### Dose entering the brewer Dry coffee placed in the AeroPress chamber. It is not the same as beans weighed before sifting when a recipe removes particles before brewing. ### Observed podium range The smallest and largest documented doses among available placed recipes in a year or period. It does not establish a formal rule minimum or maximum. ### Confirmed dose maximum A competition cap supported by rule or format evidence. A maximum is a ceiling competitors may brew below, as the 16 g third-place recipe did in 2025. ### Historical podium archive Placed recipes from many editions and coffees. It answers what appeared on the podium, not how common a method was among every entrant or finalist. ## The archive shows three dose stages The most useful summary is a low-to-moderate early spread, a high-dose concentrate period, and a rule-bounded modern period—not a single trend line. From 2009–2015, 18 of 19 available recipes have one usable dose. The median is 17.75 g and the observed range is 12–22.5 g. Those podium recipes used many water, grind, temperature, orientation, agitation, press, and service choices, so the dose summary does not make the period one coherent brewing style. From 2016–2019, all 12 available recipes have a usable dose. The median is 30 g and the range is 20–35 g. Ten of the twelve recipes are coded as high-dose concentrate plus bypass, which makes dose part of a broader water-allocation system rather than an isolated number. From 2021–2025, all 15 podium recipes have a usable dose. The median is 18 g and the range narrows to 16–18 g under the confirmed 18 g maximum. Water architecture and execution remained diverse even after the dose ceiling compressed one input. ## 2009–2015 did not have one standard championship dose The early podium archive clusters around the high teens, but the usable records span 12–22.5 g and one ranged dose remains excluded. The available early recipes resist a tidy rule story. The dataset records observed recipe values, while formal annual dose rules were not located for those editions. A 20 g podium dose therefore proves that 20 g appeared in that competition context; it does not prove 20 g was the maximum or required dose. The single missing point matters. The 2009 winner source gives a range rather than one defensible chamber dose, so Brew Supply leaves it out of the median instead of selecting a midpoint. That makes the early dose denominator n=18 even though 19 podium recipes are available in the period. Dose also does not describe the cup by itself. Early recipes often put more of their stated water through the brewing stage, while later high-dose recipes commonly produced a concentrate and added bypass. Comparing 18 g in 2012 with 18 g in 2024 without the water and method fields would erase most of the recipe architecture. ## 2016–2019 made 30 g-class concentrate recipes visible The period median rose to 30 g, while small coffee-contact water amounts and post-brew dilution often carried much of the structural work. The high-dose period includes doses from 20 to 35 g, but the median alone hides how concentrated the cluster became. Nine of the twelve podium recipes used at least 29.5 g. That pattern is a useful description of podium practice, not an experiment comparing dose while holding the coffee and method constant. A large dose was frequently paired with a small brew-water stage and substantial bypass. In that system, more coffee can create a concentrated intermediate brew while dilution, cooling, and final service determine the cup presented to judges. Copying only the dose discards the reason it may have fit the complete method—and can waste coffee without reproducing the intended beverage. The archive also cannot assign one cause to the high-dose period. Coffees, rules, recipe conventions, grinders, filtration, temperature strategy, judging conditions, and documentation changed together. Brew Supply treats the period as a real chronological pattern with multiple plausible influences, not proof that competitors steadily optimized toward 30 g. ## 2019 to 2021 is a discontinuity, not a gradual decline The last pre-hiatus podium used 30 g, 35 g, and 30 g; the first post-hiatus podium used 18 g, 18 g, and 18 g. The 2019 first-, second-, and third-place recipes form the clearest high-dose snapshot in the archive. The official recipe archive documents all three values, along with concentrate-and-bypass methods. Those recipes show what reached the podium under the 2019 context; the highest observed value must not be relabeled as a 35 g formal cap without separate rule evidence. There was no 2020 championship. When the World Final resumed in 2021, the competition introduced a confirmed maximum of 18 g and every podium recipe used that amount. The archive provides no intervening event-year recipe sequence, so the shift should be described as a reset across the hiatus, not a smooth year-by-year fall. The rule change is a strong boundary on what competitors could choose, but it still does not explain every modern recipe decision. At most, the chronology supports that the ceiling removed the earlier 30–35 g option from 2021–2025. It does not prove why a particular competitor chose a water split, grinder setting, filter system, or service routine within that ceiling. ## 2021–2025 compressed dose while the rest of the recipe stayed open Fourteen of fifteen modern podium recipes used 18 g, while the 2025 third-place recipe used 16 g and demonstrates that a cap is not a required target. All podium recipes from 2021 through 2024 used 18 g. In 2025, first and second also used 18 g, while third used 16 g. The period median and maximum therefore both equal 18 g, but the 16 g record preserves the distinction between a rule ceiling and competitor choice. The separate 2025 finalist audit reports exact primary dose values for n=21 of 25 available recipes from 66 official finalists. Its primary range is 16–18 g with an 18 g median. Those broader finalist records answer a different prevalence question and are not pooled into the historical podium timeline. Narrow dose does not mean narrow recipes. Modern podium methods still varied in brew water, bypass amount and timing, particle preparation, temperature, filters, orientation, agitation, pressing, cooling, and service. Dose history owns one axis of change; the report and recipe records are where that axis rejoins the complete system. ## Rules have to stay attached to their year The 18 g maximum belongs to 2021–2025; the current 2026 maximum is 20 g and must not be projected backward into the historical summaries. The source-of-truth rule timeline records a confirmed 18 g maximum from 2021 through 2025. Frozen annual rule pages were not recovered for every one of those years, so the page states that limitation even though competition-format evidence and the uninterrupted podium pattern strongly support the cap. The official 2026 rules now allow up to 20 g, require at least 150 g of brewed coffee, and set a 5-minute preparation, brewing, and presentation window. Those current constraints are useful for present-day preparation, but they do not rewrite what was allowed or observed in 2019, 2021, or 2025. Where a formal historical rule was not located, this page reports observed podium values rather than inventing a cap. Where a cap is documented, it is described as a maximum rather than an optimum. That evidence discipline is more useful than a seamless story because it tells a brewer exactly which claims are strong enough to carry into practice. ## Use dose history to frame a test, not to choose a winner's number Dose is a capacity and recipe-architecture decision before it is a taste claim; translate the full system and change one bounded question at a time. If you want to rebrew a historical recipe, start with the complete official instructions and record every substitution. Preserve the distinction between coffee weighed before preparation and coffee entering the chamber. Sifting or removing fines can make those values differ, and a grinder label or click count does not transfer cleanly across burrs and calibrations. For a dose comparison at home, hold coffee, final beverage target, water composition, broad contact-water ratio, temperature, agitation, filtration, press schedule, and tasting temperature as stable as practical. Compare a modest dose change, then adjust grind or water allocation in a separate round. If several controls move together, the result cannot tell you which choice changed the cup. Brew Supply's judgment is to read 30–35 g historical recipes as complete concentrate systems and 18 g modern recipes as methods designed inside a ceiling. Neither number deserves default status outside its coffee, rules, and workflow. The transferable lesson is to make dose explicit, explain what else changed with it, and measure the final drink rather than borrowing podium authority. - Record coffee entering the chamber, not only beans weighed before sifting. - Keep brew water, bypass, total stated water, output, and final beverage mass separate. - Attach every historical dose to its year and evidence status. - Treat a rule maximum as a ceiling, never as a taste recommendation. - Use podium recipes to generate testable questions, not claims of superiority. ## Related research and guides - [WAC press-timing history](/learn/world-aeropress-championship-pressing-history): See how press start, duration, and total time changed beside the dose and water-architecture shifts. - [WAC bypass history](/learn/world-aeropress-championship-bypass-history): See how separate-water use changed alongside dose, with positive ranges, exact amounts, zeroes, and unresolved records separated. - [Explore Brew Supply](/explore): Browse the complete research, guide, app, and tool directory. - [Complete WAC recipe-evolution report](/world-aeropress-championship-recipe-evolution): Inspect all available podium recipes, the interactive dose chart, exact methods, sources, missingness, and rule timeline. - [WAC recipe ratios by era](/learn/world-aeropress-championship-recipe-ratios): See how brew-water and total-water structures changed alongside dose without collapsing the denominators. - [Audited WAC 2025 finalist report](/wac-2025-recipe-analysis-report): Inspect the separate 25-recipe finalist sample, including n=21 exact primary dose values and variable-level missingness. - [Compare the 2025 podium recipes](/learn/wac-2025-podium-recipes-compared): Compare the two 18 g recipes and one 16 g recipe as complete systems under the same-coffee final. - [Why championship recipes look different](/learn/why-aeropress-championship-recipes-are-different): Put unusual doses and methods back inside their coffee, rules, judging, workflow, and service context. - [Championship-prep framework](/learn/aeropress-championship-prep): Turn a dose question into a bounded practice block with explicit controls and decision rules. - [AeroDial brew workspace](/apps/aerodial): Log dose, water stages, output, final mass, and cup direction without treating the app as a predictor. ## FAQ ### Why did old AeroPress championship recipes use 30 g or more? Many 2016–2019 podium recipes used large doses with small coffee-contact water amounts to make a concentrate, then added bypass. The archive shows that system was common on the podium, but it cannot isolate one cause or prove the dose itself created a better cup. ### When did the WAC introduce the 18 g maximum? The corrected historical timeline places the 18 g maximum at the resumed 2021 World Final. All three 2021 podium recipes used 18 g, and the maximum continued through 2025. Frozen annual rule text was not recovered for every year, so that source limitation remains visible. ### Did every 2021–2025 podium recipe use 18 g? No. Fourteen of fifteen used 18 g. Dharun Vyas's third-place 2025 recipe used 16 g, which shows the 18 g rule was a maximum rather than a required dose. ### What is the current WAC coffee-dose limit? The official 2026 rules allow up to 20 g. That current maximum is separate from the 18 g maximum used from 2021 through 2025 and must not be projected backward. ### Does a higher historical dose mean a stronger final cup? Not necessarily. High-dose recipes often diluted a concentrated brew, and final beverage mass was not always documented. Dose alone does not determine final strength, extraction, or sensory quality. ### Is 18 g the best AeroPress dose? The archive cannot establish that. Eighteen grams was a competition ceiling in 2021–2025 and the most common modern podium dose, but the records are not controlled dose experiments and do not prove an optimum for another coffee or workflow. ## Sources - [Historical WAC recipe-evolution report](/world-aeropress-championship-recipe-evolution): Brew Supply analysis of 46 available podium recipes across 49 indexed positions, with exact records and missingness. - [Historical WAC research workbook](https://docs.google.com/spreadsheets/d/1WqjWHa-fiAkpLW8h79keAeowB5_XnfhEBj0DqrXpyHI/edit?gid=429606889#gid=429606889): Versioned normalized records, evidence notes, dose fields, rule timeline, and period classifications behind this page. - [Official World AeroPress Championship recipe archive](https://worldaeropresschampionship.com/pages/recipes): Publisher archive used to verify podium recipe wording, including the 2019 and modern dose records. - [Official World AeroPress Championship rules](https://worldaeropresschampionship.com/pages/rules): Current 2026 maximum, minimum served amount, and time window; historical rules remain attached to their year. - [Audited WAC 2025 finalist report](/wac-2025-recipe-analysis-report): Separate analysis 2.0.0-rc.1 covering 25 available recipes from 66 finalists; its n=21 exact dose summary is not pooled with podium history. Data and copy reviewed: 15 August 2026.