Empowering Smarter Decisions with Verifiable Math
Calculas is an open computation platform engineered to replace opaque, ad-heavy web tools with instant, mathematically verified, and privacy-preserving calculation engines.
Why We Built Calculas
Most online calculators are black boxes. They take sensitive financial or health numbers, run hidden scripts on remote servers, and offer zero mathematical accountability. Users are left wondering whether the calculation rounded properly or accounted for statutory tax brackets.
We built Calculas to bring rigor, radical transparency, and modern web speed to everyday computations. Every tool displays its exact formula derivation, variable definitions, and stepwise examples.
The 100% Client-Side Engine
When you calculate a mortgage payment, retirement projection, or severance package on Calculas, your data never leaves your browser.
Our reactive computation engines run locally in JavaScript/WebAssembly. That means zero latency, offline capability, and absolute privacy. You can calculate sensitive personal numbers with total peace of mind.
Our Core Principles
Verified Formulas
Every calculator is verified against established statutory benchmarks (IRS, SEC, IEEE 754, WHO, NIST).
Complete Proofs
No guesswork. Step-by-step mathematical proofs and interactive breakdowns are included with every calculation.
Stateful Sharing
Share scenario URLs or download publication-grade PDF and Excel reports with a single click.
Free Embeds
Educators, publishers, and developers can embed responsive calculator widgets into any website.
Editorial & Quality Assurance Standards
Before any calculator goes live on Calculas, it passes automated regression test suites covering boundary values, negative numbers, extreme inputs, and localized tax/currency conventions:
- IEEE 754 floating-point correction and Banker's Rounding verification
- Statutory tax bracket alignment (e.g., Spain IRPF/RETA, Turkey SGK/Gelir Vergisi)
- Peer-reviewed health formulations (Mifflin-St Jeor, Katch-McArdle, WHO BMI)
- Continuous unit testing across edge cases and multi-currency formats
Contact & Continuous Feedback
Notice an edge case or have a specialized formula recommendation? We welcome feedback from mathematicians, financial analysts, engineers, and everyday users.