Geometry & Formula Calculator
A teaching-style geometry and math calculator that shows its work — available on the Apple App Store.
Every result walks you through the formula, the substitution, the intermediate step, and the final answer — the same way a teacher writes it on the board. Built for students, parents helping with homework, and anyone who’d rather understand the answer than just see it.
What you can calculate
- Shapes — 17 shapes across 2D and 3D (circle, square, rectangle, triangle, right triangle, trapezoid, parallelogram, regular polygon, ellipse; cube, rectangular prism, sphere, cylinder, cone, square pyramid, triangular prism, triangular pyramid). Perimeter, area, surface area, volume, diagonal, slant height — whichever applies. Many shapes are bidirectional: enter the area, get the side.
- Unit Converter — 12 categories: length, mass, area, volume, capacity (cooking: tsp, tbsp, cups, mL, L…), temperature, time, speed, pressure, energy, power, angle. Every conversion shows the factor and the multiplication.
- Physics Formulas — 10 staples with N-1 / N solving: Ohm’s Law, Electric Power, Newton’s Second Law, Work, Pressure, Distance/Speed/Time, Wave Speed, Density, Concentration, Pythagorean Theorem. Enter any two of three variables; the third is solved for you, with full show-work.
- Coordinate Geometry — four operations on two points: distance, midpoint, line equation from two points, and line equation from a slope and a point. Each draws an auto-scaled coordinate plane with the points plotted.
Designed for learning
- Show-work on every result: formula → substitution → step → answer
- Custom in-app keypad with π, ±, decimal, and a clear key in the same place on every screen
- Visual diagrams that morph to fit your input
- Tap any field to type into it — multi-field shapes auto-fill what they can derive
- Help screens on every tab — a quick “?” in the corner explains what each operation needs and what you get back
- Remembers your last tab and last unit selections between launches
- Universal: iPhone + iPad, optimized for both
No tracking, no ads, no subscription
Pay once, use forever. No accounts, no analytics, no third-party SDKs.
This universal iOS app runs on all devices running iOS 26.2 or above. From the maker of Fraction Calculator with Work.
We value your feedback. Please email comments and questions to support@haidar-apps.com.