Skip to content

Free tools

Financial calculators

Quick answers with the working shown. Every calculator explains its formula, its assumptions and its limits — and links to the lesson where you build it yourself.

10 calculators, all free

Time value & loans

Grow, discount and repay money over time.

Investment appraisal

Decide whether a project earns more than it costs.

Cost of capital & valuation

Discount rates and the value of a whole business.

Company analysis

Read a company's statements and unit economics.