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Economic order quantity
How much to order at a time, when to order it, and how flat the answer is
It runs entirely in this browser tab: what you type is never uploaded, and the tool makes no network request while it works. Open your browser's network panel and try it — nothing leaves the page. There is no sign-up and no account.
Settings
- Service level
- How often you are willing to run out. It needs a spread in the demand to have anything to apply to. Choices: None, Ninety per cent, Ninety-five per cent, Ninety-nine per cent.
- Show the cost curve
- The curve is flat near the bottom: ordering half the optimum costs about a quarter more, not double.
How to use it
- Paste your text into the box above, or open a file.
- Adjust the settings beside it until the result is what you wanted.
- Copy the result, or save it as a file. The result updates as you type.
Questions
- Which currency are the answers in?
- Whichever one your numbers were in. No tool here names a currency anywhere, because it cannot know which one you meant and a wrong symbol beside a right number is worse than no symbol at all.
- Is there a benchmark to compare this with?
- Only the one you give. There is no table of industry figures here, because such a table is a different number in every source and quoting one would be inventing an authority. Where a tool takes a target, it is yours.
- Is tax taken into account?
- No. Rates, thresholds and what is deductible differ by country, by year and by transaction, and a calculator that guessed would be wrong for almost everybody while looking authoritative. Where a figure is affected by tax, the tool says so and takes the rate from you.
- Is what I type uploaded anywhere?
- No. This page carries the whole tool as WebAssembly and runs it on your own device. Nothing you type is sent anywhere, and there is no network request to make while it works.
Other tools for operations
Inventory turnover
How many times the stock turns, and what a week less would release
Shipping cost
Volumetric weight, chargeable weight, and why a box of pillows costs so much
Productivity
Output an hour and output a person, which are different questions
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