P100 Coffee Grinder: What You Need to Know Before Buying

The P100 coffee grinder has been making rounds in specialty coffee circles, primarily because it offers a large flat burr set at a price point that would have been unthinkable a few years ago. If you're searching for it, you're probably either comparing it against a Niche Zero, a Lagom P64, or you've heard about it on a forum and want to know if the buzz is real.

Here's the direct answer: the P100 is a single-dose flat burr grinder with 98mm burrs. The burr size alone puts it in commercial territory. Whether it's worth the price depends on what kind of coffee you're making and how much you care about extraction consistency.

What Is the P100 and Who Makes It?

The P100 is made by Weber Workshops, a company founded by Matt Weber that focuses on precision coffee equipment. Weber entered the coffee hardware space with a reputation for machining quality, and the P100 reflects that orientation. The company is based in California, and the grinder is assembled with an emphasis on tight tolerances.

The "P" in P100 stands for Pistons, referring to a unique burr alignment system that uses three piston springs to achieve flat alignment of the burr faces. The "100" refers to the burr diameter: 98mm, which Weber rounds to 100mm in the product name.

Weber also makes the EG-1, which is a different workflow (hopper-based) and uses a different burr set. The P100 is specifically built around single-dose workflow.

The 98mm Flat Burrs: What They Actually Do

Bigger burrs produce more consistent particle size distribution. At 98mm, the P100's burrs are considerably larger than most home grinders (the Niche Zero uses 63mm conical, the Baratza Vario uses 54mm flat). More surface area means more cutting edges across the burr face, which means any given coffee particle gets cut and processed more times before exiting.

The burrs used in the P100 are available in two versions: the standard SSP-sourced burrs or the proprietary "Titanium Flat" burrs Weber developed in collaboration with SSP. The Titanium Flat burrs are a popular aftermarket upgrade if you want to push extraction even further, particularly for filter coffee.

Flat burrs at this diameter produce what specialty coffee people describe as "unimodal" grinds, meaning the particle size distribution is concentrated around one peak rather than spread across multiple peaks. In practice, this allows for higher extraction yields without the bitterness that typically comes with over-extraction using less consistent grinders.

You can pull filter coffee at 24-26% extraction with the P100 and have it taste clean and sweet rather than harsh. That's not achievable with most grinders in any price category.

Single-Dose Workflow

The P100 is built entirely for single-dosing. There's no hopper, just a small input chute where you pour your weighed beans before grinding. You dose the beans directly, grind, then collect everything from the output chute.

This workflow has real advantages for home coffee users. You never have stale beans sitting in a hopper. You can switch between different coffees without purging. You can weigh in and weigh out to track retention precisely.

The P100's retention is extremely low, typically 0.1-0.3g per grind depending on the setting. For a single dose of 15-20g, that means almost nothing is left behind. This is significantly better than most grinders, including the Niche Zero, which has slightly higher retention in some configurations.

The RDT trick (Ross Droplet Technique) works well with the P100. A single drop of water on the beans before grinding reduces static and improves grind distribution into the catch cup.

Grind Quality for Espresso vs. Filter

Espresso

The P100 pulls excellent espresso. The unimodal grind distribution means your shots extract evenly, which produces espresso with good clarity and balance. You can work with naturals, washed coffees, and lighter roasts that typically misbehave on less consistent grinders.

Dialing in espresso on the P100 takes patience because the grind adjustment is very sensitive at espresso settings. Small movements of the adjustment ring produce noticeable changes in shot time. This is a feature, not a bug, it means you have precise control, but it requires understanding how the adjustment works.

Filter Coffee

This is where the P100 genuinely stands apart. Filter coffee on the P100 is outstanding. The large burrs produce a grind with exceptional clarity that translates directly into cups with detailed flavor, clean finish, and the ability to taste things in coffee that you wouldn't notice on a standard grinder.

If you're a pour-over focused coffee person who wants a top-tier daily driver, the P100 justifies its price more clearly for filter work than for espresso (where other grinders close the gap).

Build Quality and Design

The P100 body is CNC-machined from solid aluminum. Everything is tight, nothing rattles, and the fit and finish is at a level I'd describe as jewelry-grade compared to most coffee grinders.

The grind adjustment uses a magnetic ring system. You rotate the outer ring to adjust, and the magnet holds the setting in place without drifting. This is a clever solution to the problem of adjustment rings that slowly migrate due to vibration.

The motor is a brushless DC motor rated for quiet operation. The P100 is noticeably quieter than most flat burr grinders at 75-80 dB, compared to the thwacking noise of commercial-style grinders.

One thing to know: the P100 runs at a low RPM (around 300-400 RPM). Slower RPM means less heat generation during grinding, which preserves volatile aromatic compounds. The practical result is that you need to be patient. It's not a fast grinder. A 20g espresso dose takes about 20-25 seconds, which feels slow if you're used to commercial grinders that spin fast.

How the P100 Compares to Alternatives

P100 vs. Niche Zero

The Niche Zero is the single-dosing grinder that defined the category. It uses 63mm conical burrs and has a reputation for ease of use, low retention, and consistent performance. The P100 is significantly more expensive and produces better results, particularly for filter coffee and lighter roast espresso.

If you want the easiest, most reliable single-dose experience at a lower price, the Niche is still excellent. If you want the best possible extraction quality in a home single-dose format, the P100 edges ahead.

P100 vs. Lagom P64

The Lagom P64 is another 64mm flat burr grinder popular in the prosumer space, typically around $600-700. It's smaller, lighter, and less expensive than the P100. The P64 with upgraded SSP burrs produces results that are close to the P100 for most use cases.

The P100's 98mm burrs are genuinely superior for high-extraction filter brewing. For everyday espresso and pour-over at home, the gap between P64 and P100 is real but not as dramatic as the price difference might suggest.

If you're still deciding which grinder tier makes sense for your situation, our Best Coffee Grinder and Top Coffee Grinder guides compare options across the full price spectrum.

Who Should Buy the P100

The P100 is a serious investment, typically $1,100-1,400 depending on configuration and where you buy. It makes sense if:

You brew filter coffee at a high standard and want to taste what high extraction actually means. You're a lighter-roast enthusiast who wants clean, detailed cups. You care deeply about grinder performance as a variable in your coffee quality. You've been through several mid-range grinders and want to stop thinking about upgrades.

It doesn't make sense if you're primarily making milk drinks (where grind consistency matters less in the final cup), if you're new to specialty coffee and still calibrating your palate, or if you brew mostly dark roasts where the roast character dominates.

FAQ

What burrs come with the P100?

The P100 ships with stainless steel flat burrs by default. Weber offers optional SSP Titanium Flat burrs as an upgrade. The stock burrs are excellent for espresso. The Titanium Flat burrs are optimized for high-clarity filter brewing and high-extraction espresso.

Is the P100 hard to clean?

Relatively easy for a high-end grinder. The top plate removes with a quarter-turn, giving you access to the burrs. The bean input chute detaches. Weber includes a cleaning brush. Full deep cleans with burr removal are less frequent because the low RPM and single-dose workflow reduce buildup.

Does the P100 work for espresso or is it mainly a filter grinder?

It works well for both. The single-dose design makes switching between espresso and filter settings practical. The grind adjustment ring has enough range to cover both methods, and the magnetic locking ring makes it easy to return to a saved setting.

How long do the burrs last?

Weber rates the stock burrs for approximately 300-500 kg of coffee. At 20g per day, that's 15,000-25,000 days of coffee. The burrs will last longer than almost any other component in your kitchen.

Bottom Line

The P100 delivers on its technical claims. The 98mm flat burrs, single-dose workflow, precise grind adjustment, and build quality all perform at a level that matches or exceeds the price. It's not the grinder for everyone, but for serious filter coffee brewers or espresso enthusiasts who've run out of other things to optimize, it's a legitimate top-tier choice.

Buy it for filter coffee clarity and single-dose convenience. Don't buy it expecting a dramatic espresso upgrade over a well-tuned mid-range grinder.