About OmniCalcs

OmniCalcs started with a simple frustration: reliable online calculators are usually buried behind sign-ups, paywalls or cluttered, ad-heavy pages. We believe that a mortgage estimate, a BMI check, or a unit conversion should take five seconds — not five forms.

So we built the hub we always wanted: 100% free, no registration, no apps to install, and every formula shown right on the page so you can verify the math yourself.

• 100+ tools across eight categories — finance, health, math, conversions, date & time, text, developer and everyday extras.
• Private by design — every tool runs in your browser. Your inputs never leave your device.
• Fast and mobile-first — pages load quickly and work on phones, tablets and desktops.
• Transparent formulas — the math behind each result is published on the tool page.

• Accuracy first. We use standard, published formulas and check them carefully.
• Privacy always. No accounts, no tracking scripts reading your calculator inputs.
• Honesty over hype. Where a tool gives an estimate (never exact medical or legal advice), we say so clearly.

Found a bug, have an idea, or want to say hello? We'd love to hear from you. Reach us any time on the contact page.