Calculators

Calculate percentages, percentage change, and find what percent one number is of another.

Calculate the exact number of days, weeks, months, and years between two dates.

Calculate your exact age in years, months, and days from your birthdate.

Calculate your Body Mass Index (BMI) with metric or imperial units.

Calculate tip amount, total bill, and split between multiple people.

Calculate weighted GPA on a 4.0 scale from your course grades and credit hours.

Scientific calculator with trigonometry, logarithms, exponents, and memory functions.

Generate cryptographically secure random numbers within any range — unique or with repeats.

Add, subtract, multiply, and divide fractions. Shows simplified result, mixed number, and decimal.

Calculate mean, median, mode, range, variance, and standard deviation from a list of numbers.

Solve any quadratic equation ax² + bx + c = 0. Shows real and complex roots, discriminant, and vertex.

Solve any triangle from three known values. Computes sides, angles, area, perimeter, and height. Supports SSS, SAS, ASA, AAS, and SSA cases.

Calculate radius, diameter, circumference, and area of a circle from any one known value. Also computes sphere surface area and volume.

Solve proportions (A:B = C:D) for any missing value. Simplify ratios, scale ratios, and convert ratios to fractions, decimals, and percentages.