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 electricity rate, your dog's weight — 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: a salary into federal, Social Security, Medicare, state and local tax with the bands it came from; a graphics card's bill into gaming and idle hours; a power supply into processor, card and the rest of the system. The assumptions behind each one are stated on the page, and most of them are inputs you can change.

Honest about limits

These are estimates, and the Disclaimer and the Methodology name what each engine models and what it leaves out, rather than hiding behind a generic waiver. Knowing that tax credits are excluded, or that a GPU's rated power is a ceiling rather than an average, is more useful than a vague warning that results "may vary".

How the numbers are produced

No figure on this site is typed in by hand. Each calculator runs on a versioned dataset compiled from primary sources — IRS revenue procedures and each state's department of revenue for tax, the US Energy Information Administration for electricity and fuel prices, the EPA for EV efficiency, manufacturer specifications for graphics cards, processors and AI accelerators, American Kennel Club breed standards, and national grading regulations — with the source recorded alongside the data it supports.

Two automated gates run before anything is published:

• A dataset audit. The tax data, for example, is checked for tax bands that are ordered and complete, for take-home pay that never falls as gross pay rises anywhere in the country, for filing jointly never costing more than filing single on the same income, and for zero income producing zero tax in all 51 jurisdictions.
• A cross-implementation check, for every calculator. Each 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 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.

The formulas, default assumptions and sources for each calculator are written out on the Methodology page.

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 rules are complicated or have 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 4 of the 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

10 calculator categories, each held to the same bar: derived from primary sources, checked before publication, instant to use, and explicit about its assumptions.

• US Salary After Tax — Federal, FICA, state and city tax for all 50 states plus DC.
• Payment Processing Fees — What Stripe and PayPal actually keep, per currency and amount.
• EV Charging Cost — Cost to charge any EV at home or on a fast charger, in every state.
• GPU Power & Running Cost — Real power draw and running cost of any graphics card, by state.
• Dog Weight & Nutrition — Ideal weight range and daily calories for 274 breeds.
• Self-Employed & 1099 Tax — What a contractor really keeps, and the rate that matches a salary.
• Local LLM VRAM — Which open models your GPU or Mac can actually run, and at what context.
• PSU Wattage — What power supply a build needs, sized on the CPU’s real ceiling rather than its TDP.
• GTA 6 Running Cost — What the consoles it launches on cost to run, and what is actually known about a PC version.
• GPA & Grade Conversion — Convert grades from 56 national scales to a US 4.0 GPA.

Who runs it

CalcuGrid is the name of this website, not a company. It is built and run by Efe Arda Ergez, an individual based in Türkiye, who maintains the calculators and the datasets behind them.

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.