Check /ah or /orders in-game · leave blank to skip profit
Spawner Cost ($ each) optional
Used for ROI / breakeven calc
AFK Hours / Day
Leave blank to assume 24h / day
S3 // Production Output
Bones / Min
—
Bones / Hour
—
Bones / Day
—
Spawners
—
bpm = 2.03 × n^0.984
S4 // Revenue & Profit
Revenue / Hour
—
Revenue / Day
—
ROI Breakeven
—
REVENUE / DAY
—
REVENUE / MONTH (30 days)
—
S5 // Spawner Purchase Calculator
Required
Price Per Spawner
Choose One
How Many Spawners
I know the quantity I want
OR
My Budget
How many can I afford?
Optional — unlocks payback & revenue
Bone Sell Price ($ per bone)
Defaults to $170/bone if left blank
Total Cost
—
Spawners
—
Cost Per Spawner
—
Bones Per Day (BPD)
—
PAYBACK TIME
—
REVENUE / DAY (24H)
—
Revenue / Hour
—
Revenue / Month
—
Cost Per Bone Produced*
—
*amortised over 30 days
⬡ About Donut Investing
Donut Investing is a community tool built for DonutSMP players to make smarter economy decisions.
Spawner prices are automatically pulled from Discord trading channels daily and updated here — so the numbers you see reflect real current market rates.
Kelp farm data is sourced from community-verified farm builds. All calculations run in your browser.
Auto price updatesCommunity dataNo accounts · No tracking
📐 Spawner Formula
Formula reverse-engineered from donutstats.net/prices/calculator (credit: 3706).
bpm = 2.03 × n^0.98427
Slightly sub-linear power law — each additional spawner contributes marginally less than the last.