About EveryCalc

What EveryCalc is

EveryCalc started with a simple frustration: the most important money decisions most people ever make, buying a home, refinancing a loan, planning for retirement, come down to a handful of well-known formulas, yet the tools that compute them are either buried inside bank websites designed to sell you something, or locked behind signups and paywalls.

So we built the alternative: a collection of free online calculators that run entirely in your browser, show their work, and explain what the numbers mean. Every tool is free with no signup and no usage limits. The numbers you type never leave your device, because every calculation happens locally in JavaScript. We keep the lights on with advertising, which is why you will see ads on our pages, never pop-ups that block the tools, and never paywalled results.

What we cover

EveryCalc is organized into three branches, each with its own section of the site:

Finance. The core collection: mortgage, refinance, and home affordability calculators, auto and personal loan tools, compound interest projections, and everyday math like percentages, tips, and salary conversions. These answer questions like "what will this actually cost me?" and "which option leaves me better off?"

Military. Calculators built for service members and veterans: military pay by rank and years of service, VA disability rating math, retirement comparisons, fitness test scoring, and GI Bill benefit estimates. Military life comes with its own financial rulebook, and these tools speak its language.

School. Calculators for students and families: GPA, final exam grade targets, student loan payoff, and college return-on-investment. Education is one of the biggest investments a family makes, and it deserves the same rigorous math as a mortgage.

Alongside the tools, our guides explain the thinking behind the numbers: the 28/36 rule lenders use, how Roth and traditional retirement accounts actually compare, which debt payoff strategy fits your situation, and more. Each guide pairs with a calculator, so you can read the explanation and then run your own figures.

How our calculators work

Every calculator on this site uses standard, published formulas, the same math banks, lenders, and institutions use. Loan and mortgage payments use the standard amortization formula, where each fixed payment is split between interest on the remaining balance and principal reduction. Compound growth uses the standard future-value formulas with the compounding frequency stated on the page. There is no proprietary magic and nothing to take on faith: each calculator page shows the formula it uses and a worked example with real numbers, so you can verify every result by hand.

A note on accuracy

Our calculators use standard financial formulas, but results are estimates for planning purposes. A lender's final figures may differ slightly due to fees, rounding, exact day-count conventions, and product features our simplified models do not capture (such as adjustable rates). Nothing on this site is financial advice; for big decisions, talk to a qualified professional.

Editorial standards

EveryCalc provides practical online calculators designed to make everyday calculations easier to understand and use.

Calculation methodology: Our calculators use documented formulas, defined assumptions, and appropriate rounding methods. Where relevant, individual calculator pages explain the methodology and provide worked examples.

Sources and references: Where calculations depend on financial rules, published rates, or other external information, we aim to identify relevant authoritative sources and explain applicable assumptions and limitations.

Accuracy and maintenance: We review calculator functionality and reported issues and make corrections when errors are identified. Calculation methods and explanations may be updated as requirements change.

Corrections and feedback: Users can contact EveryCalc to report calculation errors, outdated information, or other concerns. Reports are reviewed and addressed as appropriate.

Editor: The EveryCalc blog and calculators are edited by Tom Beckett.

Full methodology: Our data sources, update schedule, and verification process are documented in detail on our data methodology and sources page.

Our priority is to provide useful, understandable, and reliable calculation tools.

Where we are headed

We add calculators and guides steadily, guided by what visitors actually ask for. If a tool you need does not exist yet, or an existing one could explain itself better, we want to hear about it: get in touch. We read everything, and the best ideas for new calculators have come from readers.

Support EveryCalc

EveryCalc is free for everyone, with no accounts and no paywalls, and it stays that way whether or not anyone contributes. If a calculator here saved you time, money, or a headache, you can help cover the hosting and development costs by leaving a one-time tip on Ko-fi. It is entirely optional, and the calculators work exactly the same either way. The other support that genuinely moves the needle: tell someone who is wrestling with the same math.