About this toolkit

Business calculations,
without the jargon.

Small Business Tools for Dummies is a free, independent collection of practical calculators. It is built for owners who want a straightforward answer and an explanation they can follow.

What you can do

Estimate a cost-based selling price, compare margin and markup, calculate break-even sales, explore a discount and prepare a printable quotation. Every calculator includes a worked example and explains its assumptions.

How results are calculated

Calculations run in your browser using the inputs you provide. Pricing includes the entered labour, batch costs and fee assumptions. Break-even uses a constant contribution per item. Quotation line totals, discounts and tax round to two decimals. Currency choices format amounts; they do not perform conversion.

Use results thoughtfully

These tools provide estimates for the scenarios you enter. They do not predict demand, provide a complete accounting record or determine legal and tax requirements. Missing costs will affect the answer. Check significant decisions against your actual records and relevant professional advice.

Five tools. No account.

All 55 tools are free to use. Optional quotation drafts are stored on your device, and you can download a backup.