TOOLS
Free financial tools for entrepreneurs
4 engineering-economics calculators. No sign-up. Instant results. Based on Blank & Tarquin methodology.
Break-even Calculator
How many units you need to sell to stop losing money. 3 inputs, 1 result.
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NPV Calculator
Whether your project creates or destroys value in today's money. The #1 indicator to decide whether to invest.
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IRR Calculator
Your project's real rate of return, comparable with a fixed deposit or a bond.
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Payback Calculator
How many years until you recover the investment. The faster, the less risk.
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What is engineering economics for entrepreneurs?
Engineering economics is the discipline that turns intuition into numbers: NPV, IRR, Payback and Break-even are the four basic metrics any investor, bank or partner will ask for before putting money into your business.
Each calculator in this section answers one concrete question — is it worth it? how long until I recover? how risky is it? — using the same formulas taught in industrial engineering programs and finance graduate schools. No opinion, no marketing: pure math applied to your case.
If you already know the concepts, use the calculator directly. If not, each one links to the blog article that explains it from scratch, with numeric examples and no jargon.
Want all of it in a single analysis?
The full dashboard computes the 4 metrics + sensitivity + discounted payback + industry benchmarks — all in one run.