About MapleKit
MapleKit is a collection of fast, free, and privacy-friendly online tools designed to solve everyday problems—instantly. We built this site because we were tired of calculators that required signups, buried results in ads, or sent your data to servers. Our goal is simple: give you accurate, useful calculations when you need them, with no barriers and no tracking.
Our Mission
We believe tools should be simple, transparent, and accessible to everyone. Whether you're checking your BMI, comparing loan options, or converting units, you shouldn't have to create an account or worry about who sees your numbers. MapleKit is built around three principles: free access (no paywalls or premium tiers), privacy by design (calculations run in your browser; we don't store your inputs or results), and clarity (we explain how our tools work and when to seek professional advice).
What We Offer
Our catalog includes more than 20 calculators across health, finance, business, and everyday utility. Health tools help you estimate BMI, BMR, TDEE, calorie needs, body fat, and ideal weight—all with clear explanations and disclaimers that these are for general guidance, not medical diagnosis. Financial tools cover loans, mortgages, compound interest, retirement savings, inflation, and credit card payoff. We also offer salary and tax estimators, unit converters, age and time-duration calculators, and specialized tools like our quadratic equation solver and standard deviation calculator. Every tool is available without registration and works entirely in your browser.
How We Build Our Tools
We use established, well-documented formulas—such as the standard BMI formula, Mifflin-St Jeor for BMR, and standard amortization for loans—so you can trust the math. We're transparent about limitations: for example, BMI doesn't account for muscle mass, and financial projections assume conditions that may not hold in real life. We document this in our Accuracy and limitations page and encourage users to treat results as estimates. For more on our approach, see How we built MapleKit.
Trust and Privacy
For a full explanation of how we ensure accuracy, protect your data, and when we recommend professional advice, see our Why trust MapleKit page. We don't sell your data because we don't collect it in the first place. All calculations run locally in your device; your height, weight, loan amount, or any other input never gets sent to our servers. We don't require signup, and we don't use your inputs for advertising or analytics. Optional analytics (if enabled) are limited to aggregate usage to improve the site—never tied to individual calculations. You can read the full details in our Privacy Policy.
Our Team
MapleKit is built and maintained by a small, focused team of engineers and product people who care about useful, honest tools. We're not a large corporation; we're a small group that prioritizes clarity, accuracy, and user trust. We don't have investors pushing us to monetize your data—we'd rather keep the site free and private.
Get in Touch
Questions, feedback, or spotted an error? We'd love to hear from you. Use our Contact page to reach us. We aim to respond to genuine inquiries within a few business days. We don't offer professional medical or financial advice through the site—our tools are for education and planning, and we always recommend consulting qualified professionals for important health or money decisions.