Terms of Use

Last updated: June 2026

By using WattCost.org, you agree to these Terms of Use. If you do not agree, please do not use the site.

Informational estimates only

WattCost.org provides electricity, appliance, EV charging, fuel-comparison, and emissions estimates for general informational purposes only. Results are estimates and may differ from your actual costs, usage, savings, charging speed, or emissions.

User responsibility

You are responsible for verifying all inputs, including appliance wattage, usage hours, electricity rates, taxes, fees, tariff structure, EV battery size, charging efficiency, fuel prices, vehicle efficiency, and any other assumptions. Do not rely on WattCost.org as the sole basis for financial, electrical, installation, purchasing, safety, or energy-efficiency decisions.

Accuracy disclaimer

Actual costs depend on many factors, including your specific appliance or vehicle model, operating cycle, climate, usage pattern, utility tariff, time-of-use pricing, demand charges, taxes, delivery fees, fuel prices, charger type, battery temperature, and other local conditions. WattCost.org makes no warranty that any calculation, rate, wattage, price, comparison, or estimate is accurate, complete, current, or applicable to your situation.

No professional advice

Content on this site does not constitute professional electrical, financial, tax, legal, engineering, construction, automotive, environmental, or energy-efficiency advice. Always consult a qualified professional, licensed electrician, installer, utility provider, vehicle manufacturer, or relevant authority before making significant decisions or electrical changes.

No guarantee of savings

Any estimated savings, payback period, EV-versus-fuel comparison, appliance cost comparison, or efficiency comparison is illustrative only. Actual results may vary materially and are not guaranteed.

Electrical and installation safety

WattCost.org does not provide wiring, electrical installation, breaker-panel, EV charger installation, building-code, permitting, or safety instructions. Do not install, modify, repair, or operate electrical equipment based solely on this site.

EV charging disclaimer

EV charging estimates are approximate. Charging time, cost, range gained, and efficiency vary by vehicle, battery size, state of charge, charger rating, charging curve, battery temperature, public charging provider, energy losses, and local energy prices.

Carbon and emissions disclaimer

CO₂ and emissions estimates are approximate and based on generalized assumptions or published grid-intensity data. They are not official emissions accounting and may vary by utility, region, time of day, renewable-energy contract, and methodology.

Data sources and updates

Electricity rates, appliance wattages, fuel prices, EV assumptions, emissions factors, and other reference values may be based on public datasets, third-party sources, estimates, or typical values. We may update, correct, replace, or remove data at any time, but we do not guarantee that information is complete, current, or error-free.

Affiliate links and advertising

Some links on this site may be affiliate links. WattCost.org may earn a commission if you purchase through these links at no additional cost to you. The site may also display advertisements. Affiliate relationships and advertisements do not influence calculator formulas or results.

Third-party links and services

The site may link to third-party websites, products, services, advertisers, data sources, or tools. We are not responsible for third-party content, claims, prices, availability, products, services, privacy practices, or policies.

Limitation of liability

To the fullest extent permitted by law, WattCost.org and its owners, operators, contributors, affiliates, and service providers are not liable for any direct, indirect, incidental, consequential, special, exemplary, or punitive damages arising from your use of the site, calculator results, estimates, content, advertisements, affiliate links, third-party links, or reliance on any information provided.

Changes to the site

We may update, modify, suspend, or discontinue any calculator, content, feature, rate table, data source, or policy at any time without notice.

Intellectual property

All content on WattCost.org is owned by or licensed to WattCost.org unless otherwise stated. You may not reproduce, republish, or redistribute site content without permission, except for ordinary personal use and linking to the site.

Governing law

These terms are governed by the laws of the jurisdiction where the site operator is established, without regard to conflict-of-law rules, unless a mandatory consumer protection law provides otherwise.