About Arithmora

Arithmora is a modern calculation platform designed to give you fast, accurate answers without the noise. No popups, no ads, no account walls — just clean tools that work the moment you need them.

Our Mission

We believe everyday calculations should be effortless. Whether you're converting months to hours for a project timeline, figuring out how many weeks are in a quarter, or planning around calendar-specific dates, you deserve a tool that respects your time and intelligence.

Arithmora exists to replace cluttered, ad-heavy calculator websites with something better: a focused, privacy-first utility platform that loads instantly and delivers precise results.

What Makes Us Different

Privacy by design. All calculations run entirely in your browser. We don't collect, store, or transmit your inputs. There are no analytics trackers, no cookies, and no third-party scripts watching what you calculate.
Scientifically accurate. Our time converters use the Gregorian calendar mean (365.2425 days/year) by default, with transparent assumptions you can inspect and switch. We show the formulas, not just the results.
Built for speed. Results appear as you type — no submit buttons, no loading spinners. The entire platform is statically generated and optimized for sub-second page loads.
Shareable state. Every tool syncs its state to the URL. Share a link with a colleague and they'll see the exact same calculation, pre-filled and ready.
Free forever. Arithmora is free to use with no signup required. We believe utility tools should be accessible to everyone.

Our Tools

We currently offer a suite of precision time converters, each built with multiple calculation modes (average, calendar, and custom), reverse conversion, downloadable results, and comprehensive reference tables. We're expanding our toolset carefully — quality over quantity.

Technology

Arithmora is built with Next.js, React, TypeScript, and Tailwind CSS. The platform is statically generated for maximum performance and deployed on modern edge infrastructure. All calculation logic is open, transparent, and runs client-side — your data never leaves your device.

Get in Touch

Have a suggestion, found a bug, or want to request a new tool? We'd love to hear from you. Reach us at [email protected].