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 tools

Slope 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.