Satisfactory Calculator
Satisfactory calculator works out Output per machine and Machines needed (exact) from What to work out, Target output rate and Items produced per craft. The default figures on this page give machines to build of 4; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
4 steps
- Crafts per minute per machine = 60 / 4 × 100% = 15.
- Output per machine = 1 per craft × 15 crafts/min = 15 items/min.
- Machines needed = 60 ÷ 15 = 4, so build 4.
- Iron Ore: 1 per craft × 15 crafts/min × 4 machines = 60 items/min.
Input rates requiredtable
Its 6 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
1 source
What the satisfactory calculator calculates
Works out how many machines a target output rate needs, what input rate that consumes, and how a belt divides across several outputs, from a recipe you enter from the game — the rate arithmetic behind any factory-building game planner.
How to use this satisfactory calculator
Enter What to work out, Target output rate, Items produced per craft and Seconds per craft. Output per machine updates as you type, and “Use a worked example” loads checked figures you can adjust. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Output per machine, Machines needed (exact) and Machines to build.
The method follows Rate balancing is elementary proportional reasoning: OpenStax, Elementary Algebra 2e, chapter 6 (ratios, rates and proportions).
Target 60/min from a 4-second recipe making one item example
With What to work out: production, Target output rate: 60, Items produced per craft: 1, Seconds per craft: 4, the calculator returns Crafts per minute per machine: 15, Output per machine: 15, Machines to build: 4. This example is checked against an independent source in the test suite.
What you can compare
Change one input at a time to see how it affects Output per machine, Machines needed (exact) and Machines to build. The inputs you can vary are What to work out, Target output rate, Items produced per craft, Seconds per craft, Machine speed and Ingredients per craft.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
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Frequently asked questions
What information do I need for the satisfactory calculator?
You need What to work out, Target output rate, Items produced per craft, Seconds per craft, Machine speed, Ingredients per craft, Rate arriving at the splitter and Number of outputs. The page opens with default figures that give machines to build of 4, so you can see the scale before entering your own.
What does this satisfactory calculator show?
It shows Output per machine, Machines needed (exact), Machines to build, Actual output of that many machines, Surplus over the target, Crafts per minute per machine, Input rates required and Rate on each output, with the working and any warnings for your entries.
Can I check how the satisfactory calculator result was calculated?
Yes. The “How this is worked out” section shows the calculation steps, and the sources section identifies the references used for the method.