Pi Lab

Discover π beyond 3.14. Pi Lab combines a guided learning experience, practical calculation tools and interactive mathematical experiments in one polished app. Explore the history and properties of π, understand the formulas behind it, and apply those ideas to geometry, engineering, waves, probability and astronomy. LEARN • Follow the story of π across cultures and centuries • Understand irrationality, transcendence, radians and essential identities • Distinguish proven mathematical facts from open questions • Refer to a searchable library of formulas, definitions and trusted sources CALCULATE Use 15 focused tools covering: • Circles, arcs, sectors, circular segments and annuli • Spheres, cylinders, cones, frustums, tori, pipes and tanks • Rotation, RPM, angles, waves and harmonic motion • Normal distribution and astronomy Each calculator presents formulas, units, results and transparent working steps. Compare circles visually, save reusable presets, favourite tools and keep a local calculation history. EXPLORE • Search and inspect the first 2,000 digits of π • Change a circle and watch its relationships update • Approximate π with polygons • Run Monte Carlo and Buffon's Needle experiments • Compare infinite-series convergence PRACTISE AND TRACK PROGRESS Build quizzes from 24 explained questions across foundations, history, geometry, applications and experiments. Track completed lessons, quiz accuracy, study streaks and achievements directly on your device. SAVE AND EXPORT Save calculations, add titles and notes, mark favourites, and export selected results as a formatted PDF report or CSV file for Numbers, Excel and other data tools. PRIVATE BY DESIGN Pi Lab requires no account and contains no advertising or third-party analytics. Learning progress, preferences and saved calculations remain locally on your device. Sharing or exporting occurs only when you choose it. Pi Lab is designed for education and general calculation. Independently verify results, units, assumptions and tolerances before safety-critical engineering use.