EVE Reaction Planning Guide
Reaction work converts raw and intermediate materials into higher value products. It feels like chemistry because every job has reagents, outputs, time, and losses. This calculator helps you plan that chain before you start a job. You can enter a preset, edit every quantity, or build a custom recipe. Then it estimates material needs, output value, fees, and profit.
Choosing Inputs
Good reaction planning begins with accurate input data. Enter each material name, quantity per run, available stock, and unit price. The calculator multiplies those values by your planned runs. It also applies the material modifier. Rounded quantities help prevent shortages. Stock checks show whether your hangar can cover the plan. This is useful when you buy materials in batches.
Cost and Profit Review
Profit depends on more than recipe cost. Facility fees, fuel, taxes, and market charges can turn a good looking job into a weak one. The calculator separates material cost from operating cost. It also shows gross revenue, net profit, margin, return on cost, and break even output price. These numbers help compare several reaction plans quickly. Hourly profit is useful when jobs compete for limited slots.
Production Decisions
A strong plan also considers volume and timing. Long cycles tie up slots. Heavy inputs may increase hauling risk. Expensive outputs may need slower selling. Compare several run counts before committing. Check whether extra runs improve hourly return. Sometimes a smaller batch is safer. Sometimes steady daily work beats a large speculative job. The best plan matches wallet size, storage space, and market demand. Add notes for trade hubs, hauling routes, and structure access. These details explain why two pilots may see different profits from one recipe. Review assumptions weekly to keep margins practical and production stable.
Using Results Wisely
Treat every price as a planning estimate. Market orders move, hauling costs change, and taxes may differ by structure. Presets are starting points. Always update recipe amounts when game balance changes. You should also include safety stock for missed rounding, price spread, and hauling errors. A small buffer can prevent stopped production lines. Save the CSV or PDF report when you want a record. It helps review old jobs and improve future industry decisions.