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.
✨ 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.
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.