Calculate Anything.

Precise Calculators is an online hub of free calculators designed to simplify everyday tasks. Whether you’re checking your BMI, splitting a restaurant bill, estimating square footage for a home project or computing the return on an investment, the site’s mission is to provide free, precise and easy‑to‑use calculators for everything from daily math to complex finance, fitness tracking and scientific equations.

No. One of the platform’s core principles is that tools for making decisions should be available to everyone, not hidden behind paywalls. All calculators are completely free to use; there are no registrations or subscription fees.

The site is built with a privacy‑first approach. Calculations run entirely in your browser, meaning your inputs (such as birthdays or financial figures) are not sent to or stored on the server. The privacy policy confirms that log files and cookies are used only to operate and improve the site, while personal data you enter into calculators remains on your device.

Each calculator relies on industry‑standard formulas. For example, financial calculators use standard banking equations, and health tools like the BMI calculator follow guidelines from bodies such as the World Health Organization. However, the terms of use note that outputs are estimates, not guarantees, because real‑world variables can differ. Use the results as a guide, and consult a professional for major health or financial decisions.

The site hosts tools across numerous categories. Examples include health (BMI, BMR, calorie and due date calculators), finance (ROI, pay‑raise, discount and overtime calculators), math/statistics (percentage, rounding, fraction, mean/median/mode and factoring calculators) and home or construction calculations (square footage, staircase and asphalt estimators). In total, there are dozens of calculators covering daily math, complex finance, fitness tracking and scientific equations.

Yes. The platform is fully responsive, so it looks and works great on smartphones, tablets and desktop computers. After the site loads, many calculators continue to function even if your internet connection temporarily drops, because the logic runs in your browser.

Many calculators already offer unit toggles—such as metric versus imperial for height and weight. The team is actively working on localization and accessibility, including support for more currencies, measurement systems and languages. This ensures calculators remain relevant around the world.

The site provides estimates for planning purposes. Health metrics like BMI and calorie burn are general averages and cannot replace a consultation with a doctor or dietitian. Likewise, financial calculators offer theoretical figures; actual rates and returns depend on your lender or market conditions. Always verify critical decisions with a qualified professional.

The team welcomes feedback. In the contact form, you can choose “General Feedback,” “Report a Bug / Error” or “Suggest a New Calculator”. You’ll need to provide your name, email and a message, and they’ll respond as soon as possible. You can also reach out via email as listed in the terms and privacy pages.

Precise Calculators was founded to democratize accurate calculation, because the creators were frustrated with confusing tools, hidden fees and intrusive advertising. Their goal is to build transparent, user‑friendly calculators backed by trusted sources (such as the CDC and WHO) for health tools and widely accepted banking formulas for finance. They continue to expand the site with more specialized calculators, educational content and localization features, guided by the belief that reliable tools should be accessible to everyone.