Is JustPercentage free to use?

Yes. The calculators and guides on JustPercentage are free to use without creating an account.

How are the formulas checked?

Each page is built around standard percentage formulas and then reviewed against worked examples to make sure the outputs match the explanation on the page.

Can I rely on the site for professional advice?

The site is designed for education and quick reference. For legal, tax, or financial decisions, it is still wise to verify the numbers with an appropriate professional.

About

Our Mission

JustPercentage provides free, accurate, and easy-to-use tools and information to help people make better decisions. We provide free percentage calculators, tax estimators, GPA calculators, and other mathematical tools along with educational content explaining the concepts behind each calculation.

We believe essential information and practical tools should be accessible to everyone, regardless of budget. That is why every tool and resource on justpercentage.com is completely free to use, with no registration, no hidden fees, and no paywalls.

How We Stay Free

This site is supported by advertising through Google AdSense and affiliate partnerships through the Amazon Associates Program. These revenue sources allow us to maintain and improve the site without charging users. Advertising and affiliate relationships never influence the accuracy of our tools or the objectivity of our content. When we link to products on Amazon, we earn a small commission at no additional cost to you.

Content Quality

All content on JustPercentage is original, researched, and regularly reviewed for accuracy. Our tools are built with careful attention to established standards, formulas, and data sources. When we present data, we draw from government agencies, academic research, industry reports, and other authoritative sources. We update our content regularly to ensure it reflects current information.

Accuracy Commitment

While we strive for accuracy in all our tools and content, we encourage users to verify critical information independently. Our tools are designed for general reference and educational purposes. For decisions with significant financial, legal, or health implications, we recommend consulting with qualified professionals who can consider your specific circumstances.

Part of the PinworthyTools Network

JustPercentage is part of the PinworthyTools network of free utility websites. The network includes tools for calculations, conversions, planning, and reference across a wide range of everyday needs. Each site in the network is built with the same commitment to quality, accessibility, and user privacy.

Contact

We welcome feedback, suggestions, and corrections. If you find an error, have a feature request, or want to get in touch, please reach out through our site. We read every message and use your feedback to improve the site.

How We Build Percentage Tools

Each calculator is designed around a specific real-world question rather than a generic math widget. That means the wording, examples, and result labels are written to help people double-check restaurant tips, classroom grades, sale prices, markups, and tax-inclusive totals quickly. We intentionally keep the interface lightweight so the site loads fast on phones, works without signing in, and remains usable with keyboard navigation and screen readers.

Editorial Standards

When we publish percentage guides, we try to explain the formula in plain English and then back it up with an example someone can verify with a basic calculator. We would rather be practical than clever. If a page can help a shopper avoid a pricing mistake, a student sanity-check a grade target, or a freelancer confirm tax math before sending an invoice, then it is doing its job.