64 interactive math tools for grades K–12 — all free, all in one place!
Showing 64 of 64 tools
Visual Object Counter
Click objects to build addition equations
Number Line Plotter
Plot and compare integers, decimals & fractions
Addition & Subtraction Steps
Column method with regrouping, step by step
Skip Counting Animator
Animate number lines by 2s, 5s, 10s & more
Place Value Explorer
Break numbers into Hundreds, Tens & Ones blocks
Multiplication Grid
See multiplication as a grid of squares
Long Division Walkthrough
Step-by-step division: Divide, Multiply, Subtract
Factors, GCF & LCM
Find all factors, GCF and LCM for any numbers
Rounding & Estimation
See on a number line why numbers round up or down
Measurement Unit Converter
Length, weight, volume & temperature conversions
Scientific Notation
Convert & calculate in scientific notation
Fraction Pie & Bar
See fractions as shaded circles and bars
Fraction Simplifier
Reduce fractions to simplest form step by step
Mixed Number Converter
Switch between mixed numbers and improper fractions
Unlike Fraction Solver
Add & subtract fractions with different denominators
Fraction Multiply & Divide
Step-by-step fraction multiplication and division
Fraction ↔ Decimal ↔ %
Convert between fractions, decimals and percents
Percent Calculator
Find % of a number, what % is, and percent change
Unit Rate & Ratio Solver
Solve proportions and find unit rates instantly
Perimeter & Area
Area and perimeter for every 2D shape
Circle Calculator
Radius, diameter, circumference and area all linked
Polygon Angle Explorer
Interior & exterior angles for any regular polygon
Angle Relationships
Complementary, supplementary & vertical angles
Surface Area & Volume
3D shapes: outer surface and inner capacity
Arc Length & Sector Area
Calculate arc length and sector area from radius & angle
Pythagorean Theorem
Find any side of a right triangle with a² + b² = c²
Special Right Triangles
30-60-90 and 45-45-90 triangle side ratios solver
Distance & Midpoint
Straight-line distance and midpoint between points
Coordinate Transformations
Translate, reflect & rotate shapes on the coordinate plane
Trig Ratios (SOH‑CAH‑TOA)
Solve missing sides and angles with sin/cos/tan
Oblique Triangle Solver
Law of Sines and Cosines for non-right triangles
PEMDAS Step Solver
Evaluate expressions in the correct order of ops
Integer Sign Trainer
Add, subtract & multiply negative numbers visually
Exponent Rules
Six exponent laws with examples and a cheat sheet
Linear Equation Solver
Solve for x with step-by-step balance method
Inequality Solver
Solve linear inequalities and plot on a number line
Line Grapher (y = mx + b)
Plot any line — change slope and intercept live
Function Grapher
Plot any function — supports trig, sqrt, abs & more
Absolute Value Solver
Solve |ax+b| equations and inequalities with number line
Polynomial Calculator
Add, subtract & multiply polynomials step by step
System of Equations
Solve two simultaneous equations at once
Quadratic Formula Solver
Roots, vertex & axis of symmetry for ax²+bx+c
Matrix Calculator
Add, multiply 2×2 matrices and find determinants
Log & Exponent Evaluator
Solve log base 10, ln and custom-base equations
Sequence & Series
Arithmetic & geometric sequences with partial sums
Unit Circle Converter
Degrees ↔ Radians with trig values on the circle
Limit Simulator
Approach a point from both sides to find limits
Complex Number Calculator
Arithmetic on complex numbers with Argand diagram
Derivative Solver
Differentiate polynomials, trig & exponentials
Integral Evaluator
Definite and indefinite integrals step by step
Mean, Median & Mode
Find center, spread, range and outliers
Histogram Builder
Build a frequency table and histogram from your data
Box-and-Whisker Plotter
5-number summary with an accurate visual plot
Dice & Coin Simulator
Simulate probability experiments up to 1000 trials
Normal Distribution & Z-Score
Bell curve, z-scores and the 68–95–99.7 rule
Permutations & Combinations
Calculate nPr and nCr for counting problems
Regression & Best Fit Line
Scatter plot with line of best fit and R² value
Digital Wallet Simulator
Practice spending and making correct change
Grocery Unit Pricing
Compare products to find the true best value
Tip & Bill Splitter
Split a bill, pick a tip %, and divide per person
Compound Interest Predictor
Watch savings grow over 10, 20 and 40 years
Monthly Budget Tracker
Plan income vs expenses with a live spending chart
Loan Amortization
See how payments split between principal & interest
Tax & Take-Home Pay
Estimate tax brackets and net paycheck