Reaction Profit Calculator (Daily)
Estimate your daily ISK profit for one reaction line. Enter your material costs, output price, and operating expenses.
Output & Throughput
Input Materials (per run)
Operating Costs & Market Fees
Tip: Set optional material quantities to 0 if your formula only uses two inputs.
How to Use This EVE Online Reaction Calculator
This tool helps you quickly estimate whether a reaction is worth running today. EVE markets move fast, and the spread between input moon materials and reaction outputs can change multiple times per day. Instead of guessing, use a simple daily model: Revenue - Input Costs - Fuel - Fees - Other Costs = Profit.
The calculator is intentionally flexible. You can use it for low-tier reactions, advanced composites, and custom scenarios where your buy orders, tax profile, and structure setup differ from other industrialists.
What Each Field Means
Output & Throughput
- Output Units per Run: How many finished units one reaction run produces.
- Runs per Day: Total completed runs in a 24-hour period (adjust down for downtime, hauling, or interruption).
- Output Sell Price: Your realistic net listing target before taxes and broker fee are applied by this tool.
Input Materials
- Enter each required material as quantity per run and ISK price per unit.
- Use your actual acquisition cost if you mine/harvest internally, not just current Jita sell.
- Optional fields let you model recipes with fewer or more components.
Operating Costs
- Fuel Blocks per Hour: Consumption allocated to your reaction setup.
- Fuel Block Price: Current price you pay per block.
- Installation Cost per Run: Job fee/installation cost per cycle.
- Sales Tax + Broker Fee: Your market character’s actual percentages.
- Other Daily Costs: Freighter contracts, collateral losses, opportunity overhead, etc.
Why Reaction Margins Can Look Good but Still Lose ISK
Many pilots only compare output value to input value and ignore everything else. In practice, your final number is often compressed by market friction and logistics.
- Ignoring broker fees can erase a thin margin.
- Fuel spikes can flip “profitable” reactions into break-even.
- Slow-moving sell orders tie up capital and reduce effective returns.
- Hauling risk and time cost are real—even if not always obvious in spreadsheets.
Practical Workflow for Better Industrial Decisions
- Pull current buy/sell data from your target market hub.
- Enter realistic, not optimistic, prices into the calculator.
- Run three scenarios: conservative, expected, and aggressive.
- Prioritize reactions with healthy margin and high daily ISK throughput.
- Re-check numbers before large reprocessing or restocking cycles.
Advanced Tips for Reaction Profitability
1) Track Break-Even Output Price
The calculator returns a break-even price per output unit. If market sell falls below this line, pause production or switch formulas.
2) Benchmark ISK per Hour, Not Just Margin %
A high-margin reaction with tiny volume can underperform a lower-margin, high-throughput line. Focus on total daily and hourly ISK.
3) Use Character Skills and Structures Wisely
Tax and broker optimization significantly affects final profit. Over large volumes, even a one-percent difference compounds fast.
Final Thoughts
Great EVE industry planning is less about one perfect formula and more about disciplined iteration. Use this reaction calculator daily, update prices often, and treat every run like a business decision. When your assumptions are consistent, your profitability becomes predictable—and that is how industrial empires are built.