3D Topology Explorer
Interactive 3D Surface Grapher. Visualize Paraboloids, Hyperboloids, Torus knots, and Spheres in real-time.
✨ New Tool
3D Topology Explorer
Visualize complex geometries like Paraboloids, Toroids, and Spheres in real-time with our new 3D engine.
Launch Calculator →The Open Source Calculation Library
CalcFoundry provides high-performance, privacy-focused calculators for Finance, Engineering, and Mathematics. Our tools are free, open-source, and run 100% locally in your browser—ensuring instant results with zero data tracking.
Polynomial Grapher
Plot and analyze Quadratic, Cubic, and Quartic functions. Automatically calculates vertex and roots for parabolas.
Australia Crypto Tax Calculator
Estimate your Capital Gains Tax (CGT) on cryptocurrency trades in Australia. Includes 2024-2025 tax brackets and the 50% long-term holding discount.
Retirement Planning Calculator
Calculate the future value of your retirement savings with a crucial twist: see both your projected account balance AND its actual purchasing power after inflation.
ShadowStats Inflation Calculator
Compare Official US CPI inflation against the ShadowStats (1980-based) true inflation. See how much the methodology changes affect your wallet.
True Rating Calculator (Wilson Score)
Calculate the true statistical accuracy of a rating or conversion rate using the Wilson Score Interval.