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Caffeine Blog

Why One Size Doesn’t Fit All: Understanding Coffee Machine Capacity

  • March 3, 2026
  • Machines, Products, Uncategorised

When choosing a coffee machine, one of the first specifications people look at is “daily output”.

But here’s the truth:

A drink is not just a drink.

And capacity is not as simple as a number.

If you’re choosing between machines like the Schaerer Soul, Skye, Club or WMF 950 S, understanding what capacity actually means could save you from over- or under-specifying your equipment.

Let’s break it down.


What Does “Daily Capacity” Actually Mean?

When manufacturers state a machine can produce:

  • 200 drinks per day
  • 300 drinks per day
  • or 500 drinks per day

They are not counting cups the way you might expect.

Bean-to-cup machines calculate capacity based on:

  • Water throughput
  • Milk system output
  • Boiler recovery
  • Grinder performance
  • And total millilitres produced

In simple terms:
Capacity is based on volume – not on “a drink”.

And that’s where it gets interesting.


A 6oz Drink Is Not a 16oz Drink

Let’s take a simple example.

  • 6oz = 180ml
  • 12oz = 350ml
  • 16oz = 480ml

If your business serves:

  • Flat whites in 6oz cups → you’ll get far more drinks per day
  • Large 16oz lattes → your total output drops significantly

The machine hasn’t changed.

The volume has.

This is why capacity can vary dramatically depending on your menu and your customer expectations.


Why We Use 12oz as the Industry Standard

At Caffeine Limited, we’ve supplied and serviced machines for over two decades.

Across foodservice environments – garden centres, contract catering, hospitality retail, forecourts – we consistently see:

12oz (350ml) as the golden standard for milk-based drinks.

Could we calculate capacity based on 6oz and make the numbers look bigger?

Yes.

But that wouldn’t be honest.

Most modern foodservice operations are not serving 6oz drinks as their primary volume. Customers expect larger formats.

So in our brochures, when you see capacity, it is:

*Based on a 12oz (350ml) milk-based beverage.

And we clearly reference that with an asterisk, because transparency matters.


Real Output Comparison by Drink Size

Here’s what output actually looks like across machines when adjusted for cup size:

Daily Output – Milk-Based Drinks by Drink Size

Drink SizeShaerer SoulShaerer SkyeShaerer ClubWMF 950 S
6 oz (180 ml)250–300130–150100–12040–50
8 oz (240 ml)220–250110–13080–9035–45
10 oz (300 ml)200–25090–11060–7030–40
12 oz (350 ml)180–22075–9050–6025–35
14 oz (420 ml)150–18060–7540–5020–30
16 oz (480 ml)130–16045–6030–4015–25

1-Hour Milk Drink Output by Drink Size

Drink SizeShaerer SoulShaerer SkyeShaerer ClubWMF 950 S
6 oz120–14070–8035–4520–25
8 oz100–12060–7030–4018–22
10 oz90–11050–6025–3515–20
12 oz75–9545–5520–3012–18
14 oz60–8035–4515–2510–15
16 oz50–7030–4012–208–12

(Based on milk-based beverage output under typical foodservice conditions.)


How to Choose the Right Machine for Your Business

Instead of asking:

“How many drinks per day can this machine do?”

Ask:

  1. What is our average cup size?
  2. What percentage of drinks are milk-based?
  3. What are our peak hours?
  4. Are we planning to grow volume?

You can back-engineer the decision.

For example:

If you expect:

  • 200 drinks per day
  • 80% milk-based
  • 12oz average size

Then you can align your needs directly with the output table above.

That’s when machine selection becomes strategic – not guesswork.


Why One Size Doesn’t Fit All

A machine that works perfectly in:

  • A 40-seat café

May fail in:

  • A high-volume garden centre

And a machine that is ideal for:

  • 12oz latte-driven foodservice

May be overkill for:

  • A small office serving 6oz flat whites

Capacity, workflow, menu style and customer behaviour all matter.

This is exactly why we don’t believe in “one machine fits everyone”.

We believe in:

Understanding your drink size
Understanding your peak flow
Understanding your growth plans
And matching machinery to real-life usage


Final Thought

Coffee machine capacity isn’t about the biggest number.

It’s about the right number for your business.

And getting that right means better workflow, better drink consistency, and better long-term performance.

If you’re unsure which machine fits your operation, fill this for and speak to our team – we’ll help you reverse engineer it properly.

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CAFFEINE LIMITED
3 LITTLE MUNDELLS
WELWYN GARDEN CITY
HERTFORDSHIRE
AL7 1EW

T. 01707 278 400

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