7 free online calculators with step-by-step solutions
Pick the right tool for your problem — 2D shapes, 3D solids, proofs, or composite figures.
Start with these essential advanced & general calculators
The advanced category gathers calculators that don't fit neatly into a single shape family: Heron's formula (triangle area from three sides only — no height needed), geometric sequence and series (aₙ = a·rⁿ⁻¹, Sₙ = a(1 − rⁿ)/(1 − r)), the Pythagorean theorem in general and 3D form, special right-triangle ratios (30-60-90 and 45-45-90), isosceles triangle theorem applications, and compound-figure decomposition. These tools target high-school competition and SAT/ACT problem patterns where the standard "plug into formula" approach fails — they walk through the algebraic setup. Each calculator pairs with a worked example showing how to recognise the problem type from exam wording, useful for self-study and tutoring contexts.
This collection has 7 advanced geometry calculators: 4 are tagged Most Popular, 2 are supporting tools, and 1 are advanced calculators for derivations and proofs. The most-used tools include Law of Sines Calculator, Law of Cosines Calculator, Geometric Sequence Calculator.
1 of these calculators support AI Vision: upload a photo of your problem (handwritten, textbook, or whiteboard) and the AI returns the full step-by-step solution. Vision-enabled tools in this category include Composite Figure Calculator.