All Online Calculators
Explore verified, fast, client-side online calculators across finance, mathematics, real estate, engineering, healthcare, and everyday calculations.
Percentage Calculator
Calculate what X% of Y is, percentage relationships, and parts of a whole with step-by-step breakdown.
Percentage Increase Calculator
Calculate the new value after increasing an initial number by a specified percentage.
Percentage Change Calculator
Calculate the percentage change (growth or decline) between an old value and a new value.
Fraction Calculator
Add, subtract, multiply, and divide two fractions with automatic reduction and decimal conversion.
Ratio Calculator
Solve proportions A : B = C : D and simplify arbitrary numerical ratios into lowest integers.
Average Calculator
Calculate the arithmetic mean, median, range, and sum of comma-separated numbers.
Exponent Calculator (Powers)
Calculate base raised to any integer or fractional power with scientific notation formatting.
Square Root & Nth Root Calculator
Calculate the square root, cube root, or any nth root of a positive real number.
GCD / HCF Calculator
Find the Greatest Common Divisor (GCD) / Highest Common Factor (HCF) of two positive integers.
LCM Calculator
Calculate the Least Common Multiple (LCM) of two positive integers.
Basic Calculator
Perform standard addition, subtraction, multiplication, and division arithmetic.
Scientific Calculator
Calculate trigonometric functions (sin, cos, tan), natural and base-10 logarithms, and exponentials.
Standard Deviation & Variance Calculator
Compute sample and population standard deviation, variance, mean, and sum of squares for any data set.
Probability Calculator (Permutations & Combinations)
Calculate permutations nPr and combinations nCr for choosing r items out of n possibilities.
Random Number Generator
Generate pseudo-random integers uniformly distributed within any defined minimum and maximum range.
Quadratic Equation Solver
Solve ax² + bx + c = 0 to find real or complex roots and discriminant.
Linear Equation Solver (ax + b = c)
Solve simple single-variable linear equations ax + b = c instantly.
System of 2 Linear Equations Solver
Solve system of two linear equations: a₁x + b₁y = c₁ and a₂x + b₂y = c₂ via Cramer's rule.
Arithmetic Sequence Calculator
Calculate the nth term and the sum of the first n terms of an arithmetic progression.
Geometric Sequence Calculator
Calculate the nth term and sum of terms of a geometric progression.
Fibonacci Sequence Calculator
Calculate the nth Fibonacci number F(n) using Binet's golden ratio formula.
Golden Ratio Calculator
Calculate golden ratio dimensions (A : B = 1.618033...) for art, design, and architecture.
Factorial Calculator (n!)
Calculate factorial n! and Stirling's approximation for large integers.
Prime Number Checker & Factorizer
Test whether a number is prime and compute its smallest divisor.
2x2 Matrix Determinant Calculator
Calculate determinant det(A) = ad - bc of a 2×2 matrix.
2D Vector Dot Product Calculator
Calculate dot product u·v = u₁v₁ + u₂v₂ and angle between two 2D vectors.
Z-Score Calculator
Compute Z = (X − μ) / σ to evaluate standard deviations from the mean.
Confidence Interval Calculator
Calculate 95% confidence interval for sample mean X̄ ± 1.96(s/√n).
Pearson Correlation (r) Quick Estimator
Estimate linear correlation strength between variables X and Y.
Polynomial Term Evaluator
Evaluate polynomial term c × x^p for any coefficient c, variable x, and power p.
Modulo & Remainder Calculator
Calculate integer quotient, remainder, and modular congruence of a divided by b.
Circle Area
Calculate the surface area of a circle from its radius.
Circle Circumference
Calculate the perimeter (circumference) of a circle from its radius or diameter.
Rectangle Area & Perimeter
Calculate the area, perimeter, and diagonal length of a rectangle.
Triangle Area (Base & Height)
Calculate triangle area from known base and perpendicular height.
Triangle Area (Heron's Formula)
Calculate triangle area from the lengths of its three sides a, b, and c.
Trapezoid Area
Calculate the area of a trapezoid (trapezium) from parallel bases and height.
Ellipse Area & Perimeter
Calculate area and Ramanujan perimeter of an ellipse from semi-major and semi-minor axes.
Cylinder Volume & Surface Area
Calculate volume and total surface area of a circular cylinder.
Sphere Volume & Surface Area
Calculate the volume and outer surface area of a sphere.
Cone Volume & Slant Height
Calculate cone volume, slant height s = √(r² + h²), and total surface area.
Pyramid Volume (Square Base)
Calculate the volume and lateral surface area of a square-based pyramid.
Regular Polygon Calculator
Calculate the area, perimeter, apothem, and interior angle of any regular n-sided polygon from 3 to 100 sides.
2D Coordinate Distance & Midpoint Calculator
Calculate Euclidean distance, midpoint coordinates, slope, and line equation between two points (x₁, y₁) and (x₂, y₂).
Compound Interest Calculator
Calculate future investment growth, interest earned, and compound compounding frequency breakdown.
Simple Interest Calculator
Calculate simple interest, maturity amount, and daily/monthly interest accrual.
SIP Calculator (Systematic Investment Plan)
Estimate long-term wealth created through monthly disciplined mutual fund SIP investments.
Lumpsum Investment Calculator
Calculate wealth gain on a one-time lump-sum mutual fund or equity investment.