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Economic Order Quantity Calculator
Estimate classical EOQ, annual costs and an optional deterministic reorder point.
Annual demand (units), Cost per order, Annual holding cost per unit, Operating days per year, Lead time (operating days), Extra safety stock (units)
JSON
Browser only
Runs locally in your browser. Your files, pasted content and generated output are not uploaded. Reset clears this tool’s working data.
This tool needs JavaScript. If it does not load, refresh the page and try again.
How to use this tool
- Enter the labelled values and use the displayed units.
- Choose Calculate result and inspect the full report, assumptions and undefined/no-solution status.
- Choose Download result to save the complete JSON. Reset clears results and restores the example controls.
Examples
Annual demand (units): 10000
Cost per order: 50
Annual holding cost per unit: 2
Operating days per year: 250
Lead time (operating days): 5
Extra safety stock (units): 20
Limitations
- Positive annual demand,order cost,annual holding cost per unit; days/year positive,lead time days and safety stock nonnegative. Constant deterministic demand,no shortages/discounts; continuous EOQ with adjacent integer cost comparison. No live demand forecast. Operating days/year must not exceed366.
- Scalar numeric inputs use explicit decimal syntax and IEEE-754 arithmetic; unless a tighter bound is stated, positive values are 1e-12–1e12 and nonnegative values 0–1e12. Derived inventory counts above 1 billion and nonfinite results are refused. Combined input limit400,000 UTF-8 bytes;complete JSON output limit4MiB. Numeric/code input controls allow128 characters. All processing stays in your browser.
- Whole purchasing/layout counts use exact entered decimal quantities for rational formulas; circular geometry remains floating-point.
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