Charcoal farms on Donut SMP are not free money. They work, but only when the numbers are right. We tested a large spruce-log charcoal setup with bulk inputs, hopper minecarts, furnace arrays, and AFK selling. The farm produced money, but the real profit depended heavily on spruce log cost and charcoal sell price.

If you build this blind, you can waste millions. If you build it with the right ratios and market checks, it becomes a solid AFK income farm.

• Donut SMP Charcoal Farm Basics
• Real Test Numbers: Cost, Output, and Profit
• Materials You Actually Need
• Best Location for a Donut SMP Charcoal Farm
• Build Order: Fast and Clean
• 1. Dig the Full Area First
• 2. Build the Furnace Array
• 3. Install Hopper Minecarts
• 4. Connect Storage and Selling
• Fuel Ratio and Log Loading
• Profit Formula Before You Run It
• Best Market Conditions for Charcoal Profit
• When to Scale the Farm
• Scale If:
• Do Not Scale If:
• Common Problems and Fast Fixes
• AFK Selling Setup
• FAQ
• Is a charcoal farm worth it on Donut SMP?
• How much money does this charcoal farm make?
• How many hopper minecarts do I need?
• Why is my charcoal farm making less profit?
• Should I add more furnaces?
• Summary

↖ Donut SMP Charcoal Farm Basics

This farm turns spruce logs into charcoal, then sells the charcoal for money.

The loop is simple:

1. Spruce logs enter the farm

2. Logs spread into furnaces through water streams and hoppers

3. Furnaces smelt logs into charcoal

4. Part of the charcoal fuels the farm

5. The rest goes into storage or an AFK sell setup

The best part is the fuel loop. Once started, the farm can use its own charcoal to keep running. That cuts fuel management down hard.

The weak point is the market. If everyone is building charcoal farms, spruce logs rise and charcoal drops. That kills profit fast.

↖ Real Test Numbers: Cost, Output, and Profit

Here are the tested numbers from a large run.

This is the part most players ignore: 32.5M revenue is not 32.5M profit.

The logs cost 27.6M. After costs, the farm made around 5M profit.

That is still useful. But it is not instant billions unless the market is much better or the farm is scaled heavily.

↖ Materials You Actually Need

Exact block counts depend on your layout or schematic, but these are the parts that matter.

Do not waste money on decoration at the start. Use cheap blocks first. Upgrade the look after the farm pays for itself.

↖ Best Location for a Donut SMP Charcoal Farm

Build far away. Not a little hidden. Actually hidden.

Look for:

• No nearby tunnels
• No abandoned farms
• No exposed cave systems
• No common travel paths
• Enough room to expand
• Safe AFK position for your main or alt

If you find griefed farms nearby, leave. That area has traffic. Traffic gets farms raided.

A charcoal farm is not tiny. Once built, it is expensive to move. Pick the location properly before placing hopper minecarts.

↖ Build Order: Fast and Clean

Follow this order. It saves time and prevents ugly rebuilds.

↖ 1. Dig the Full Area First

Do not build in a cramped hole.

Leave space for:

• Furnace array
• Hopper lines
• Minecart rails
• Water streams
• Output chests
• Maintenance access

If you need to fix the farm later, you will be glad you left room.

↖ 2. Build the Furnace Array

Each furnace needs three paths:

• Input: spruce logs
• Fuel: charcoal or starter fuel
• Output: finished charcoal

If some furnaces stay empty, your distribution is bad. Fix the input before scaling.

↖ 3. Install Hopper Minecarts

Large versions may need around 67 hopper minecarts.

Bring spares. One missing minecart can leave part of the farm dead.

After placing them, test with a small log batch. Do not dump hundreds of thousands of logs into an untested system.

↖ 4. Connect Storage and Selling

All charcoal should end in one controlled output.

Use:

• One main chest for short runs
• Multiple double chests for longer AFK
• Shulker loaders if scaling hard
• AFK sell axe setup if you want passive selling

If charcoal backs up, your storage or sell speed is the bottleneck.

↖ Fuel Ratio and Log Loading

For a large one-session run, the tested input was:

Use shulker boxes. Do not manually feed loose stacks unless you enjoy pain.

Best loading method:

1. Fill shulkers with logs only

2. Keep fuel-side and smelting-side supply separate

3. Drop logs into the correct input

4. Watch the first few minutes

5. Confirm every furnace is working

If random items enter the system, they can clog hoppers or filters. Keep inputs clean.

↖ Profit Formula Before You Run It

Use this before buying logs.

``text

Profit = Charcoal Revenue - Spruce Log Cost

`

More useful version:

`text

Profit = (Charcoal Sold × Charcoal Price) - (Logs Bought × Log Price)

``

Example using tested prices:

That matches the real result: about 5M profit.

This is why market checking matters. The farm design can be perfect, but bad prices still ruin the margin.

↖ Best Market Conditions for Charcoal Profit

Charcoal farms are economy-sensitive.

If charcoal is high and logs are cheap, run the farm hard.

If charcoal crashes and logs spike, pause. Buying logs in a bad market locks your money into weak profit.

↖ When to Scale the Farm

Only scale when the current farm has a real bottleneck.

↖ Scale If:

• Logs are sitting in input too long
• Every furnace is constantly active
• Charcoal price is strong
• Spruce logs are cheap
• Storage has room
• Your sell setup keeps up

More furnaces help only if smelting speed is the problem.

↖ Do Not Scale If:

• Charcoal is already backing up
• Some furnaces are empty
• Spruce logs are overpriced
• Charcoal price is falling
• You are barely breaking even

Scaling a broken or low-margin farm just makes the mistake more expensive.

↖ Common Problems and Fast Fixes

Watch the farm for 10–15 minutes after starting. Most failures show up early.

↖ AFK Selling Setup

For long runs, storage alone is not enough. You need a clean sell system.

Best options:

If the sell axe cannot process fast enough, charcoal stacks up. Once storage fills, the farm slows or stops.

Before going AFK, check:

• Fuel line works
• Logs are feeding evenly
• Output reaches the chest
• Sell axe is positioned correctly
• Storage has extra room
• AFK spot is hidden and safe

↖ FAQ

↖ Is a charcoal farm worth it on Donut SMP?

Yes, but only with decent prices. If charcoal sells high and spruce logs are cheap, it is a strong AFK money farm. If the market flips, profit drops fast.

↖ How much money does this charcoal farm make?

In the tested run, it sold about 32.5M worth of charcoal and made around 5M real profit after log costs. Better market prices can push that much higher.

↖ How many hopper minecarts do I need?

A large build may need about 67 hopper minecarts. Bring extras. Missing one can break furnace distribution.

↖ Why is my charcoal farm making less profit?

Usually because of market prices. If spruce logs cost too much or charcoal sells too low, your revenue looks good but your actual profit is weak.

↖ Should I add more furnaces?

Add more furnaces only if logs are waiting in the input and all current furnaces are working. If output storage is full or furnaces are empty, fix the bottleneck first.

↖ Summary

The Donut SMP charcoal farm is a solid AFK money method, not a guaranteed money printer.

The tested large run used 277,200 spruce logs, cost about 27.6M, sold 32.5M in charcoal, and cleared roughly 5M profit. That proves the farm works, but it also proves the margin depends on the market.

Build it hidden. Use cheap blocks. Test before full loading. Track spruce log price and charcoal sell price before every run. Scale only when your furnace array, storage, and sell setup can all keep up.