About These Calculators
Free math calculators for algebra, geometry, trigonometry, and pre-calculus. Solve quadratic equations, graph linear functions, factor polynomials, evaluate trig functions, and more. Each tool shows the formulas and steps so you build real understanding, not just get answers.
High School Math Calculators
60 toolsSlope Calculator
Calculate the slope between two points with rise over run breakdown
Slope-Intercept Form Calculator
Find the equation of a line in y = mx + b form from two points
Point-Slope Form Calculator
Convert point and slope to point-slope, slope-intercept, and standard form
X and Y Intercept Finder
Find x-intercept and y-intercept of a linear equation in standard form
Midpoint Calculator
Find the midpoint and distance between two points on a coordinate plane
Parallel & Perpendicular Line Calculator
Find parallel or perpendicular line equations through a given point
Linear Equation Solver
Solve one-variable linear equations step by step (ax + b = c)
Graphing Linear Equations Calculator
Generate key points and intercepts for graphing a linear equation
Systems of Equations Solver (2×2)
Solve a system of two linear equations using elimination or substitution
Systems of Equations Solver (3×3)
Solve a system of three equations with three unknowns step by step
Linear Inequality Solver
Solve linear inequalities and express the answer in interval notation
FOIL Method Calculator
Multiply two binomials using the FOIL method with step-by-step work
Polynomial Multiplication Calculator
Multiply two trinomials and combine like terms step by step
Factoring Trinomials Calculator
Factor quadratic trinomials ax² + bx + c into two binomials
GCF Polynomial Calculator
Find the greatest common factor of polynomial terms and factor it out
Difference of Squares Calculator
Factor and expand expressions using the difference of squares pattern
Polynomial Long Division Calculator
Divide a quadratic polynomial by a linear divisor using long division
Synthetic Division Calculator
Divide a cubic polynomial by (x - c) using synthetic division
Polynomial Addition Calculator
Add two polynomials by combining like terms step by step
Quadratic Formula Calculator
Solve any quadratic equation using the quadratic formula with step-by-step work
Completing the Square Calculator
Convert a quadratic from standard form to vertex form by completing the square
Vertex Form Converter
Convert quadratic equations between standard form and vertex form
Discriminant Calculator
Calculate the discriminant to determine the number and type of solutions
Quadratic Vertex Calculator
Find the vertex, axis of symmetry, and direction of a parabola
Exponent Rules Calculator
Apply exponent rules for multiplication, division, and power of a power
Simplify Radicals Calculator
Simplify square roots by extracting perfect square factors
Cube Root Calculator
Calculate cube roots and determine if a number is a perfect cube
Rational Exponents Calculator
Convert between rational exponents and radical form and evaluate
Negative Exponents Calculator
Evaluate negative exponents and convert to fraction form
Exponential Equation Solver
Solve exponential equations of the form base^x = result using logarithms
Compound Inequality Solver
Solve compound inequalities (AND/OR) with interval notation
Absolute Value Equation Solver
Solve absolute value equations |ax + b| = c with both solutions shown
Absolute Value Inequality Solver
Solve absolute value inequalities and express in interval notation
Inequality Graphing Calculator
Determine boundary, shading, and test points for graphing linear inequalities
Domain and Range Finder
Find the domain and range of common function types
Function Composition Calculator
Calculate f(g(x)) and g(f(x)) for linear and quadratic functions
Inverse Function Calculator
Find the inverse of a linear function f(x) = ax + b
Arithmetic Sequence Calculator
Find the nth term and sum of an arithmetic sequence
Geometric Sequence Calculator
Find the nth term and sum of a geometric sequence
Direct & Inverse Variation Calculator
Find unknown values using direct or inverse variation relationships
Triangle Solver
Solve any triangle by entering sides and angles using SSS, SAS, ASA, or AAS methods
Special Right Triangles Calculator
Quickly find all sides of 45-45-90 and 30-60-90 special right triangles from any known side
Triangle Inequality Checker
Check if three side lengths can form a valid triangle and identify its type (scalene, isosceles, equilateral)
Heron's Formula Calculator
Calculate triangle area from three side lengths using Heron's formula with semi-perimeter
Triangle Angle Sum Calculator
Find the missing angle of a triangle given two angles and classify the triangle type
SOH CAH TOA Calculator
Calculate sine, cosine, and tangent ratios for right triangles using SOH CAH TOA
Inverse Trig Calculator
Calculate arcsin, arccos, and arctan to find angles from trigonometric ratios in degrees and radians
Trig Function Evaluator
Evaluate all six trigonometric functions (sin, cos, tan, csc, sec, cot) for any angle
Degrees to Radians Converter
Convert between degrees and radians with exact pi-form results for common angles
Law of Sines Calculator
Solve triangles using the Law of Sines: find missing sides and angles from angle-side pairs
Law of Cosines Calculator
Find unknown sides and angles of any triangle using the Law of Cosines generalization of the Pythagorean theorem
Unit Circle Calculator
Find exact sine, cosine, and tangent values for any angle on the unit circle with quadrant identification
Right Triangle Solver
Solve any right triangle completely by entering two known measurements (sides or angle)
Equation of a Circle Calculator
Generate the standard and general form equations of a circle from center coordinates and radius
Arc Length Calculator
Calculate the arc length and sector area for a given radius and central angle in degrees or radians
Sector Area Calculator
Calculate the area of a circular sector and its arc length from radius and central angle
Circle Properties from Equation
Extract the center, radius, area, and circumference from any circle equation in general form x² + y² + Dx + Ey + F = 0
Logarithm Calculator
Calculate logarithms of any base including natural log (ln), common log (log10), and custom bases with change of base
Exponential Growth & Decay Calculator
Calculate exponential growth or decay with final amount, doubling time, and half-life from initial value, rate, and time
Combinations & Permutations Calculator
Calculate combinations (nCr) and permutations (nPr) with step-by-step factorial breakdowns
Frequently Asked Questions
Are these high school math calculators free?
Yes, all 60 calculators are completely free with no signup required. They run entirely in your browser — no data is sent to any server.
How accurate are these calculators?
Our calculators use industry-standard formulas and are regularly updated. However, they provide estimates — always verify critical calculations with a professional in the relevant field.
Can I use these calculators on my phone?
Yes, all calculators are mobile-responsive and work on any device with a web browser. No app download needed.
Do you save my calculations?
No. All calculations happen in your browser. We don't store any of your inputs or results. Your data stays on your device.
Can I embed these calculators on my website?
Select calculators offer embed codes that you can copy and paste into your website or blog. Look for the "Embed This Calculator" section on individual tool pages.