Math calculators
Algebra, geometry, percentages, and 2×2 matrix tools.
Math calculators on pancalc cover algebra, geometry, calculus aids, number theory, and statistics-adjacent tools — each with step-by-step context and worked examples tied to the engine configuration.
Students and professionals use them to verify homework, explore how changing one variable affects another, and build intuition before opening heavier software.
Symbolic edge cases and domain restrictions (such as positive lengths or defined square roots) are noted on each page. Always check whether your problem meets the assumptions listed.
25 calculators
2×2 Matrix Determinant & Inverse
Find a 2×2 matrix determinant and inverse with clear steps, practical checks, and worked examples for linear transformations and systems.
3D Distance & Midpoint Calculator
Find the straight-line distance and midpoint between two 3D coordinates for modeling, mapping, geometry, and spatial analysis. Free browser tool.
Conic Sections Calculator
Area of a circle or ellipse from radii/semi-axes. Use the calculator above. Use the calculator above. Use the calculator above. Free browser tool.
Cross-Sectional Area Calculator
Area of circle, rectangle, or triangle cross-sections. Use the calculator above. Use the calculator above. Free browser tool. Free browser tool.
Cubic Equation Solver
Real root of depressed cubic x³ + px + q = 0 via Cardano formula. Use the calculator above. Use the calculator above. Free browser tool.
Euclid's Algorithm Calculator
Greatest common divisor and least common multiple of two integers. Use the calculator above. Use the calculator above. Free browser tool.
Fraction Calculator
Add two fractions and reduce to lowest terms. Use the calculator above. Use the calculator above. Use the calculator above. Free browser tool.
Function Plotter Table
Evaluate preset f(x) at x-min, x-max, and step for a value table. Use the calculator above. Use the calculator above. Free browser tool.
GCD & LCM Calculator
Calculate greatest common divisors, least common multiples, and a simple primality check for two integers with practical examples.
Gradient and Slope Calculator
Calculate grade percentage and slope angle from rise and horizontal run for ramps, roofs, trails, and engineering layouts. Free browser tool.
Long Division Calculator
Integer quotient and remainder from dividend and divisor. Use the calculator above. Use the calculator above. Free browser tool. Free browser tool.
Modulo Congruence Calculator
Find positive remainders and test modular congruence for integers, schedules, number theory, and programming examples. Free browser tool.
Numerical Integration Calculator
Trapezoidal rule estimate of ∫₀¹ x² dx or custom interval with f(x)=x². Use the calculator above. Use the calculator above. Free browser tool.
Percentage Change Calculator
Calculate percentage increase or decrease between two values, or solve for an original or new value with clear examples. Free browser tool.
Pi Approximation Explorer
Leibniz series partial sum for π/4 from term count. Runs in your browser. Runs in your browser. Runs in your browser. Runs in your browser.
Pi Digits Generator
Deterministic pseudo-digit block from index for educational demos. Use the calculator above. Use the calculator above. Free browser tool.
Pythagorean Theorem Calculator
Use the Pythagorean theorem to calculate a missing right-triangle side in metric or imperial units with worked practical examples.
Quadratic Formula Solver
Solve quadratic equations, inspect the discriminant, and understand real roots with clear formula steps and numerical examples. Free browser tool.
Rate of Change & FOIL Calculator
Slope between two points and FOIL expansion of (ax+b)(cx+d). Use the calculator above. Use the calculator above. Free browser tool.
Sequence & Series Calculator
Arithmetic and geometric series sums from first term, ratio/diff, and n terms. Use the calculator above. Free browser tool. Free browser tool.
Significant Figures Calculator
Round a number to a specified count of significant figures. Use the calculator above. Use the calculator above. Free browser tool.
Simple Scientific Calculator
Two-operand calculator with +, −, ×, ÷ and sqrt on operand A. Use the calculator above. Use the calculator above. Free browser tool.
Triangle Calculator
Calculate a valid triangle’s perimeter, Heron’s-formula area, and angle opposite side a from three side lengths. Free browser tool.
Vector Dot & Cross Product Calculator
Calculate 3D vector dot products, cross products, and angles with practical examples for geometry, physics, and computer graphics.
Word Problem Template (Distance–Rate–Time)
Solve distance = rate × time for any missing variable. Use the calculator above. Use the calculator above. Free browser tool. Free browser tool.