About ChargeCalcs

Who builds ChargeCalcs

ChargeCalcs is built and maintained by Dan Dadovic, based in Northumberland in the north-east of England. My working background is split between commercial strategy and applied research. My day role is Commercial Director, and I am currently completing a PhD in Information Sciences — which shapes how I approach every calculator on this site: define the problem precisely, cite the data source, verify against a reference, document the method, and review periodically.

I drive an electric vehicle, and the reason this site exists is that the tools I wanted when I first started home charging, planning road trips, and tracking cost per mile did not exist in one place. I also work at Ezoic, an ad technology and digital publishing platform, which gives me a working view of web performance, analytics, and content quality at scale.

ChargeCalcs is not an isolated project. It is part of a portfolio of niche utility websites I build and operate under the Site Factory framework — a documented methodology for producing accurate, well-sourced calculator sites. The portfolio includes PrinterTools, VoltCalcs, HardHatCalc, PeakCalcs, CookCalcs, and CritterCalcs. The shared framework means every new site inherits quality gates, testing infrastructure, and institutional lessons learned across prior projects.

Why this site exists

Existing EV calculators fall into predictable categories. Manufacturer tools only work for one brand. News-article calculators are usually embedded afterthoughts with no methodology. Independent tools tend to be thin widgets that ignore the charging curve, skip worked examples, and rarely cite a source. Some are outright wrong — during the build process for this site I found and replaced 19 broken or fabricated source links from competing tools that were used as starting references.

ChargeCalcs is the site I wanted to use when I first owned an EV. Every calculator works with any vehicle in the database, models the real charging curve (not a constant-speed approximation), includes worked examples with step-by-step numbers, and cites the published formula it is built on. The positioning is honest: I am not an automotive engineer, a battery scientist, or an electrician. I am a data analyst and web developer who owns an EV and got frustrated by the quality of the existing tools. The credibility here comes from transparent sourcing, not from professional credentials in the field.

How the calculators are built

Every calculator follows the same pipeline. First, the formula is identified from a published, verifiable source — SAE International standards for charging power, Idaho National Laboratory test data for DC fast charging, research papers for battery degradation, regulator filings for electricity rate structures. The source is cited on the calculator page and can be checked independently.

Second, the vehicle database is sourced from the EPA Fuel Economy Guide (fueleconomy.gov) for US-market vehicles, WLTP test data for models sold primarily outside the US, and manufacturer specification sheets where neither standardised source is available. Each of the 20-plus EV models in the database carries its own source citation. Electricity rates come from the US Energy Information Administration, the UK Ofgem price cap, the Ontario Energy Board and BC Hydro for Canada, and the Australian Energy Regulator. Fuel prices come from AAA in the US and RAC Fuel Watch in the UK.

Third, every calculate function is paired with automated tests that verify output against hand-calculated expected values — one primary scenario and at least one edge case. The full test suite contains more than 600 automated checks covering formula accuracy, schema validation, content quality, internal link topology, accessibility, and AI-phrasing detection. A calculator without passing tests cannot be published.

Fourth, the data is reviewed on a schedule. Vehicle specifications are checked quarterly to catch new model years and mid-cycle updates. Electricity and fuel rates are refreshed quarterly. Financial calculators carry a six-month cost-data expiry that triggers a forced review when it passes. The methodology page documents the full process in detail, including the Stage 2b formula accuracy audit that web-searches every cited source and verifies every worked example against the live calculator output.

Calculator methodology is independently reviewed by power-engineering academics at FERIT Osijek: Doc. dr. sc. Danijel Jerković-Štil (power electronics, chargers, BMS, motor control) and Doc. dr. sc. Damir Topić (photovoltaic systems, battery storage). Full bios, scope, and faculty links are on the reviewers page; the per-reviewer split is also summarised on the methodology page.

The portfolio behind it

ChargeCalcs is one of seven live sites in the Site Factory portfolio. The framework itself was distilled from 222 pages of documented lessons across three earlier projects, 27 specific mistakes catalogued in the institutional-knowledge document, and the data gathered from operating CalculatorCorp — a 4,300-page calculator site that earns roughly $600 per month via display advertising and serves as the live laboratory for identifying which calculator niches deserve dedicated treatment.

Each site in the portfolio targets a specific niche: VoltCalcs covers general electrical calculations for home and professional use, HardHatCalc covers construction and trades, PeakCalcs covers fitness and body composition, CookCalcs covers recipe scaling and conversions, CritterCalcs covers pet-care calculations, and PrinterTools covers 3D printing. ChargeCalcs is the dedicated EV site because EV ownership questions deserve their own data sources, their own methodology, and their own depth of coverage — not a handful of generic widgets buried inside a broader calculator directory.

Contact and transparency

For corrections, data subject requests, or general enquiries: contact@chargecalcs.com. Every calculator on this site produces estimates, not professional advice. For major decisions — a home charger installation, a vehicle purchase, a cross-country trip in a region you do not know — verify critical numbers with a qualified electrician, automotive technician, or financial advisor. The terms page covers the full disclaimer. The goal here is to be useful and transparent, not to claim false precision.