About CalcuGrid

Why this exists

Search for something as ordinary as "$85,000 after tax in Georgia" and you will mostly find pages that make you work for the answer: an email gate, a multi-step wizard, a full page reload between every input, a number with no explanation of how it was reached, or a quote form for a financial adviser you did not ask for.

CalcuGrid was built on the opposite premise. You arrive, the answer is already on screen, and you can change any input and watch every figure update as you type. That is the entire product.

What we optimise for

Instant

The answer for the page's headline figure is in the HTML before any JavaScript runs, so it is readable the moment the page paints — and readable even if scripts never load. After that, a full recalculation and screen update takes well under a millisecond, which is why dragging a slider feels like moving a physical dial rather than filling in a form.

Client-side and private

Every calculation runs in your browser. Your salary, your filing status, your contributions — none of it is transmitted anywhere, because there is nothing to transmit it to. The site is static files on a CDN with no backend and no database. We could not look up what you calculated if we wanted to. There is no account to create and no email address to hand over.

Shows its working

A number with no derivation is not much use. Every result is broken down line by line — federal, Social Security, Medicare, state, local, payroll levies — with the effective and marginal rates alongside, and the tax bands the figure came from published on the same page. If you disagree with the answer, you can see exactly where we disagree.

Honest about limits

These are estimates, and the Disclaimer names specifically what the engine models and what it omits, rather than hiding behind a generic waiver. Knowing that credits and itemised deductions are excluded is more useful than a vague warning that results "may vary".

How the numbers are produced

The tax data is not typed into the site by hand. It lives in a versioned dataset compiled from primary sources — IRS revenue procedures and each state's own department of revenue — with a citation recorded against every jurisdiction. That dataset is what generates the 1,377 salary pages currently published for tax year 2026.

Two automated gates run before anything is published:

• An arithmetic audit. It checks that tax bands are ordered and complete, that take-home pay never falls as gross pay rises anywhere in the country, that filing jointly never costs more than filing single on the same income, and that zero income produces zero tax in all 51 jurisdictions.
• A cross-implementation check. The calculation exists twice — once as the reference implementation used to build the pages, once as the code that runs in your browser. Both must agree to the cent on a fixed set of test cases, or the build fails. This is what guarantees the number in the page you were served and the number you get after changing an input come from the same maths.

None of that makes the figures a substitute for professional advice. It does mean that when they are wrong, they are wrong because the underlying law is complicated or has just changed — not because of a typo.

The data is public

The datasets underneath these calculators are published openly under CC BY 4.0, so anyone can check them, use them or correct them: github.com/bigfe-efe/calcugrid-open-data.

That is 274 AKC breed standards in metric, 51 sets of state tax brackets for 2026, 56 national grading scales with their local classifications, plus GPU power figures and EV efficiency ratings. Each file ships with the caveat that would otherwise catch someone out — that the dog weights are kilograms rather than pounds, that four grading scales run backwards, that a US GPA equivalent is a convention and not an official conversion. A dependency-free script in the repository re-runs those checks, so none of it has to be taken on trust.

Publishing it is partly self-interested: data that other people can check is data we are more careful with. If you find something wrong, an issue on that repository is the fastest way to get it fixed everywhere at once.

How it is funded

Advertising, and nothing else. There is no paid tier, no affiliate placement inside the calculators, and no lead sold to a third party. Ad slots reserve their exact space before they load, so an arriving advert never pushes the answer you were reading down the page. If ads are blocked, everything still works.

What is here, and what is coming

US salary after tax is live for all 51 jurisdictions with 26 dedicated salary pages each. Payment processing fees, EV charging costs, GPU running costs, dog weight and nutrition, and international GPA conversion are in build. Each new calculator has to clear the same bar: derived from primary sources, audited before publication, instant to use, and explicit about its assumptions.

Get in touch

Corrections are the most welcome kind of message — if a figure looks wrong, tell us and we will trace it. Suggestions for calculators worth building are a close second. Write to contact@calcugrid.com or use the contact page.