Production Ratio Calculator
Set a target rate and get the build: how many machines at each step, what raw materials that consumes, how many belts the flow needs, and what it draws in power.
Data matches game version 2.1.12, updated 2026-08-04.
How this is calculated
Every step is the same piece of arithmetic. A recipe states how long one craft takes and how much it yields, so the number of crafts per second needed for a target rate is the rate divided by the yield. A machine gets through one craft in the recipe time divided by its crafting speed, so the machine count is crafts per second multiplied by that. Each ingredient demand then becomes the target rate for the step above it, and the same arithmetic repeats until the chain reaches something the game does not craft.
Where the numbers come from
Craft times, yields, ingredient lists, machine crafting speeds and power draw are read from the game's own published prototype definitions for version 2.1.12 — not transcribed from a wiki and not estimated. Belt throughput is derived from each belt's movement speed rather than hardcoded, which is why the tool reports the familiar 15, 30 and 45 items per second figures without those numbers appearing anywhere in the code.
Modules apply to one machine, not the whole chain
The module setting applies to the machine making the item you picked, not to every machine upstream. This matters more than it sounds: applying a productivity bonus at every depth compounds it down the tree and understates raw demand, because the bonus ends up feeding into itself. If you have modules in your smelters too, run the smelting step as its own query.
Applies when…
- Recipes are the standard Nauvis ones. Planet-specific routes such as casting on Vulcanus or scrap recycling on Fulgora are not substituted in.
- Fluids are treated as inputs and are not expanded further. Oil and chemical processing produce several outputs from one recipe, and splitting a cost across them needs an assumption we are not willing to bury inside a number.
- Machine counts are exact fractions. A result of 6.4 machines means six machines will fall short and seven will idle part of the time.
- Power figures cover machines actively crafting. Idle drain is not included, because the prototype data does not state a drain value for these machines.