StarRupture: Understand Recipe Ratios Before Scaling a Plan

Worked StarRupture ratios: combine two targets, then subtract stock once

The selected Fabricator recipe consumes 15 Wolfram Bar per minute and outputs 30 Wolfram Wire. Its direct material ratio is 15 ÷ 30 = 0.5 bar per wire. The included machine-tier comparison shows why a different machine may change that ratio.

Combine both targets before using the same 10 stored Titanium Ore. The combined titanium demand is 53.333; stock used once is 10; the remaining theoretical demand is 43.333. Round that final remaining amount up once to gather 44. The displayed decimals are shortened for reading; calculations preserve the underlying proportions.

Open the combined-target example →

Opening an example replaces the plan saved in this browser with an editable snapshot. Export your current plan first if you want to keep it. Copies do not synchronize.

Calculated from Update 2 · Quality of Life, retrieved 2026-10-30, using the first included default recipe for every output. Examples use the pinned Update 2 default recipes. Update 3 Public Test Branch switches for building, crafting and unlocking costs are not modeled; corporation-difficulty percentages are not material-cost multipliers. Official public-test announcement. These are material ratios, not discrete craft batches, building construction costs, or completion times. Read the reviewed version status.

Next: assign this combined budget to two crewmates.

Convert rates into proportions

The imported dataset expresses recipe inputs and outputs as amounts per minute. Divide an input rate by the output rate to obtain that ingredient's theoretical cost per output item. For an illustrative recipe consuming 30 units per minute and producing 10, the ratio is three input units per output. These example numbers explain the calculation; they are not an additional game recipe.

Expand the chain consistently

Multiply each required output quantity by its ingredient ratios, then repeat for ingredients that must also be produced. Combine shared demands and allocate inventory once across the plan. When alternative recipes exist, keep the selection explicit because a different route changes upstream requirements. Do not silently switch routes between branches or assume that every listed recipe is currently available to your character.

Know what rates cannot prove

A ratio does not reveal an exact manufacturing batch size, startup delay, transport limit, or end-to-end completion time. Rounding every intermediate line upward can overstate demand, while rounding too early can hide accumulated fractions. Preserve the theoretical result and label any practical allowance separately. Check the recipe version and an example in the game before committing a large collection trip.

Compare the same target before changing the recipe

The Stator and Electromagnet cases hold the total finished-item goal and first default recipe selections fixed. The only difference between each pair of snapshots is the listed inventory. This isolates the effect of stored finished parts, intermediate components and raw resources; it is not a machine-tier optimization or a measured factory speed-up.

• Finish an 18-Stator stock check: inventory and before/after gathering budget
• Build an 8-Electromagnet reserve: inventory and before/after gathering budget

Trace a stocked branch instead of rounding every line

Read the case’s starting inventory and compare both theoretical amounts and rounded gathering values. Smaller theoretical demand can sometimes leave the same rounded gathering amount; that is a rounding boundary, not proof the stored component had no effect.

1. Open the no-stock case and inspect its terminal material budget.
2. Open the matching stocked copy, keeping the same target quantity and default recipes.
3. Read Production steps to find finished or intermediate quantities covered by stock before their ingredients expand.
4. Compare the same terminal resource across the two case columns; fractions remain in the theoretical values.
5. Round only the final terminal shortfall for gathering. Do not round every intermediate recipe line up and then expand those rounded values.
6. If the in-game recipe or custom costs differ, stop treating this default-baseline example as that game setting; review Data & sources and the in-game recipe.

• Finish an 18-Stator stock check: inventory and before/after gathering budget
• Build an 8-Electromagnet reserve: inventory and before/after gathering budget

An owned amount is not a delivery schedule

Enter only usable stock. A future delivery, a teammate’s unconfirmed promise, a completed-looking checkbox or a different local copy is not additional inventory. A shared snapshot preserves the amounts when its link was created; it does not keep the chest total current. The cases compare material proportions, not exact batches, completion times, unlocks or gathering locations.

Try the complete inventory workflow

These runs include partially completed targets, intermediate components and raw resources. Keep the total target unchanged when opening the stocked copy; the finished inventory is already included.