All tools (35)

Browse the complete EasyMath index — every tool, A to Z.

A1 tools
Most popular tools

Average Calculator

Mean, median, mode, sum, range — instant statistics for any list of numbers.

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B1 tools

Basic Calculator

Simple four-function calculator — add, subtract, multiply & divide.

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C2 tools

Circle Calculator

Area, circumference, diameter — and 90° arc & sector — from radius.

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Confidence Interval Calculator

Compute confidence intervals for means — 95%, 99% or custom.

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D2 tools

Date Difference Calculator

Days, weeks, months & years between two dates — instant.

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Density Calculator

Solve density, mass or volume — ρ = m / V — for any two knowns.

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E1 tools

Exponential Growth Calculator

A = P · e^(rt) — population, bacteria, compound growth.

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F1 tools

Fibonacci Generator

Generate the first N Fibonacci numbers — arbitrary precision.

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G3 tools

GPA Calculator

Compute your grade point average on a 4.0 scale, weighted by credits.

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GCF & LCM Calculator

Greatest common factor and least common multiple of any integers.

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Grade Calculator

Weighted class grade from assignments, exams and categories.

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L1 tools

Linear Regression Calculator

Fit y = mx + b to (x, y) data points — with R² correlation.

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M3 tools

Molar Mass Calculator

Compute the molar mass of any chemical formula — H₂O, NaCl, C₆H₁₂O₆…

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Matrix Calculator

Add, subtract, multiply and find determinants of 2×2 and 3×3 matrices.

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Multiplication Table Generator

Generate an N×N multiplication table — with hover highlight & CSV.

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O1 tools

Ohm's Law Calculator

Solve V = I × R for any one variable — voltage, current or resistance.

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P11 tools

Percentage Calculator

Three common percentage calculations — instant & private.

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Projectile Motion Calculator

Range, max height, time of flight — for any launch angle and velocity.

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Percentage Change Calculator

Percent increase or decrease between two values — with multiplier.

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Pythagorean Theorem Calculator

a² + b² = c² — solve for any side of a right triangle.

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Permutation & Combination Calculator

Compute nPr and nCr — order matters, or it doesn't.

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Probability Calculator

P(A), P(A∪B), P(A∩B) — single and joint event probability.

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Prime Number Checker

Is a number prime? Instant yes/no with factor if composite.

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Prime Number Generator

List the first N primes — or primes up to a limit.

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Prime Factorization Calculator

Break any integer into its prime factors — 2² × 3 × 5, etc.

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pH Calculator

pH from [H⁺] and reverse — with pOH, [OH⁻] and temperature.

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Pearson Correlation Calculator

Measure linear correlation between two variables — r from −1 to +1.

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Q1 tools

Quadratic Equation Solver

Solve ax² + bx + c = 0 — real and complex roots, with discriminant.

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R2 tools

Ratio Calculator

Solve the missing side of a ratio, or simplify it with GCD.

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Resistor Color Code Calculator

Decode 4-band resistors from colors — and reverse value → colors.

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S2 tools

Scientific Calculator

A real working calculator: functions, constants, memory & percent.

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Statistics Calculator

Mean, median, mode, std deviation & more from a list of numbers.

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T1 tools

Triangle Calculator

Area (Heron's), perimeter and angles from three sides.

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V1 tools

Variance & Standard Deviation Calculator

Compute variance and standard deviation — population & sample.

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Z1 tools

Z-Score Calculator

z = (x − μ) / σ — with percentile and tail probability.

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