Data & Spreadsheets

BiznTools

A collection of browser tools for business calculations, inventory planning, quotes, invoices, PDF tasks and data conversion, with explanations of methods and limits.

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What you can use it for

  • Pricing and profit calculations
  • Inventory planning
  • Quotes and invoices
  • PDF and data preparation

Before you choose

Only one profit-margin calculation was tested. Other calculators, file processing, PDF/CSV exports and optional saved drafts were not tested. Results depend on the entered cost scope and each tool's assumptions; this is not an accounting system or a verification of omitted costs.

About this listing

Tested for this task
Official sources reviewed on . The test notes below describe the scope of our check.

Test notes

2026-10-08: Opened Profit Margin Calculator without an account, entered fictional revenue 100 and included costs 80, then selected Calculate margin. The result showed profit $20.00 and margin 20.00%, matching (100-80)/100. This single calculation does not validate the other tools or all boundary cases. No private business data was supplied. On 2026-10-22 the direct official calculator source URL was reviewed and attached. The calculation test above remains dated 2026-10-08; no new calculation test was performed.

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