Free calculators

Finance calculators

Loans, interest, savings and payoff schedules.

Guides for running the business

15 calculators

Loan Calculator

Works a loan payment, where the term changes the total far more than it changes the payment..

Mortgage Calculator

Works a mortgage payment, where principal and interest is only part of it..

Payment Calculator

Works a periodic payment, where the frequency affects the total..

Amortization Calculator

Builds an amortisation schedule, which shows where the money actually goes..

Compound Interest Calculator

Works compound interest, where time matters more than rate..

Simple Interest Calculator

Works simple interest, which applies to the principal only..

Investment Calculator

Projects an investment balance from assumptions you supply, not a forecast..

Savings Calculator

Projects savings growth, where inflation decides what the balance buys..

Retirement Calculator

Projects a retirement balance, where the assumptions carry almost all of the result..

Credit Card Payoff Calculator

Works credit card payoff, where paying the minimum is the expensive path..

Debt Payoff Calculator

Plans a debt payoff, where two orderings trade interest against momentum..

APR Calculator

Works APR, which includes certain fees and is therefore the comparable figure..

Interest Rate Calculator

Solves for the rate, where the result depends on which rate is meant..

Inflation Calculator

Works purchasing power over time, where the index matters..

Currency Converter

Converts currency, where the rate you get is not the rate you see..

Beyond the numbers

Tools that produce something you can send

Invoice Generator

Build a clean, itemised invoice and print it to PDF.

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Estimate Generator

Turn a scope of work into a priced estimate the customer can approve.

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Work Order Generator

Write the job down before the technician leaves: what, where, who, and what they need to take with them..

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