DonutSMP Kelp Farm — Profit Calculator & ROI Analysis
DonutSMP kelp farm full profit analysis — input costs, output revenue, ROI math.
Kelp farms convert bones + blaze rods into kelp/dried kelp at scale. The economics depend entirely on your input costs. Here's the full math.
What a kelp farm does
Standard DonutSMP kelp farm:
- Smokers convert raw kelp → dried kelp
- Bones used to grow kelp faster (bone meal effect)
- Blaze rods used as smoker fuel
- Output: dried kelp blocks, sold on /order
Typical farm specs:
- 1,080 smokers parallel
- 2,160 bones consumed per second
- 720 dried kelp blocks per second output
- 2.59M dried kelp blocks per hour
The economics
| Per hour | Output / Cost |
|---|---|
| Dried kelp blocks produced | 2.59M |
| Sells on /order at | ~525 each |
| Gross revenue | 1.36B coins |
| Bones consumed | 7.77M |
| Bones cost (at 170 each) | 1.32B coins |
| Blaze rods consumed | ~30k |
| Blaze rod cost (at 150 each) | 4.5M coins |
| Net profit | ~38M coins/hour |
Where the leverage is
At standard input prices, kelp farm produces ~38M coins/hour. But the bone cost dominates (97% of input cost).
If you can source bones cheaper:
| Bone price | Net profit/hour | Daily potential |
|---|---|---|
| 170 each | 38M | 912M |
| 150 each | 192M | 4.6B |
| 130 each | 348M | 8.4B |
| Free (own spawner) | 1.36B | 32.6B = $3,260 retail |
Free bones = the farm prints money. That's why kelp farms are most useful when paired with skeleton spawners.
The kelp farm pricing
Most DonutSMP kelp farms sell for $30-40. Sample listing might be "Kelp Farm V2 1080 Smokers, ~63M coins/hr" for $35.
At your bone cost (170 each):
- Profit: 38M/hr (after fuel)
- ROI: 24 hours of operation = $30-40 farm pays itself off
If you don't have spawners: marginal. If you have spawners: huge.
When to buy a kelp farm
Buy if:
- ✅ You own 2+ skeleton spawners (free bones)
- ✅ You can babysit AFK delivery 8+ hours/day
- ✅ Your store has 50+ daily orders so you can sell coins faster than the farm produces them
Don't buy yet if:
- ❌ You're paying 170+ per bone (margins razor thin)
- ❌ You can't keep alts online 24/7
- ❌ You don't have 5M+ coins for setup
The hidden cost
Babysitting. The farm needs:
- An online alt to load chunks
- Constant fuel replenishment (smokers + bones)
- Selling output (block dumps on /order)
Estimate 30-60 min/day of active management.
Comparison: kelp farm vs spawner
| Iron Golem Spawner ($3) | Kelp Farm ($35) | |
|---|---|---|
| Input | None (mob spawn) | Bones + blaze rods |
| Output | 10M/hr | 38M/hr at expensive bones |
| Setup | Place + collect | Build + fuel ongoing |
| Babysitting | Light | Heavy |
| ROI | 3-6 hours | 1-2 days (if bones bought) |
For 90% of players: spawner is better. Kelp farm is for vertical-integration players with multiple income streams.
Frequently Asked
Can I run a kelp farm without any spawner? Yes but the margins are tight. You're effectively a fuel-buying middleman. Profitable but not great per hour.
What if I rent a spawner from another player? Some players rent bone supply at 100-140 each. Better margins than retail but pricier than owning.
Can the farm get griefed? Yes — that's the seller's "12-hour insurance" claim. Hide it well, don't tell people the coords.
Is the location really secure? "Permanent safety can't be guaranteed" — read the listing carefully. Bring backup capital for relocation.
Skip the farm — buy coins direct → · Money-making strategies →
Published at May 21, 2026
