DonutSMP Zombie Spawner Calculator
Estimate rotten flesh per minute, hour and day for any spawner count - with DonutSMP's diminishing returns built in.
Zombie spawners are the budget entry into DonutSMP spawner farming: the spawners themselves trade cheaply, and rotten flesh piles up fast while you AFK. Like every spawner type on DonutSMP, though, stacking more spawners gives diminishing returns per spawner.
Enter your zombie spawner count below to estimate rotten flesh per minute, per hour, and per day. The numbers use the diminishing-returns curve measured on DonutSMP skeleton spawners (credit: 3706), applied here as an approximation - the server throttles all spawner types with the same mechanic, but zombie drop yields were not separately measured.
Zombie Spawner Count
Estimated production for 1 zombie spawner
Estimate only: production times the latest average rotten flesh price recorded by our tracker. Auction prices move constantly.
Current Rotten Flesh Price on DonutSMP
$444.11per rotten fleshlatest daily average (past 30 days), as of Jul 2, 2026
Full rotten flesh price historyHow to use the zombie spawner calculator
- Enter your spawner count. Type the number of zombie spawners in your farm into the calculator - from a single spawner up to a full warehouse.
- Read the production estimate. The calculator applies DonutSMP's diminishing-returns spawner curve and shows the estimated rotten flesh per minute, per hour, and per day.
- Check the income estimate. When recent rotten flesh price data is available, the calculator also multiplies production by the latest average auction price to estimate income per hour and per day.
About the production curve
The formula behind this calculator was fitted by DonutSMP community member 3706 from real measurements of skeleton spawners: bones collected per minute across a range of spawner counts. It captures DonutSMP's diminishing returns - each additional spawner adds less than the one before it. DonutSMP applies the same stacking throttle to every spawner type, so this page applies the same curve to zombie spawners as an approximation - per-mob drop yields were not separately measured, so treat the numbers as estimates.
What rotten flesh are used for
Rotten flesh is a pure bulk commodity: it moves in large stacks at low unit prices, so zombie farm income lives or dies on volume. Check the live rotten flesh price before sizing a farm around it.
Frequently asked questions
How many rotten flesh does a zombie spawner produce on DonutSMP?
Production does not scale linearly on DonutSMP: a handful of spawners each produce roughly two drops per minute, but the server throttles output as you stack more, so per-spawner yield keeps falling. Enter your exact spawner count in the calculator above - it applies the diminishing-returns curve community member 3706 measured on DonutSMP skeleton spawners, applied to zombie spawners as an approximation and shows estimated rotten flesh per minute, hour, and day.
Do spawners have diminishing returns on DonutSMP?
Yes. The more spawners you run, the less each individual spawner produces. The curve used by this calculator was fitted from real measurements on DonutSMP (credit: 3706): per-spawner output starts near two drops per minute and decays toward roughly 0.064 drops per minute per spawner at very large counts. That is why doubling your spawners does not double your income.
How much money do zombie spawners make per hour on DonutSMP?
That depends on the current auction price of rotten flesh. When recent price data is available, this page multiplies the estimated rotten flesh per hour by the latest average rotten flesh price recorded by our DonutSMP price tracker and shows the result next to the production numbers. Prices move constantly, so treat it as a snapshot and check the live rotten flesh price page before you commit to a build.
Is a zombie spawner farm worth building on DonutSMP?
Zombie spawners are usually the cheapest spawner type to buy, which makes them a common first farm. Rotten flesh sells at low unit prices though, so the farm's value depends entirely on volume and the current market. Use the calculator to estimate your hourly output, then check the live rotten flesh price page to see what that volume is actually worth today.
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