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Основен калкулатор

Standard arithmetic operations. Enter your values — see the result with formula, examples, and step-by-step working. Free.

Калкулатор за проценти

Calculate percentages, increases and decreases. Quick calculation with worked example and formula. Free everyday calculator.

Квадратна формула

Solve any quadratic equation ax²+bx+c=0. Enter coefficients — get all roots via quadratic formula, completing the square, and factorisation. Free.

Калкулатор за бакшиш

Calculate the tip amount for any restaurant bill. Enter the total and tip % — see tip per person, total including tip, and custom tip amounts. Free.

Калкулатор за отстъпка

Calculate Discount quickly and accurately. Enter your values — see the result with the formula, worked example, and unit options. Free.

Средна стойност, медиана и мода

Calculate mean, median, and mode of any dataset. Enter values — see all three averages, sorted data, frequency table, and range. Free.

Калкулатор за оценка на тест

Convert correct answers to percentage and letter grade. Fast and accurate result with formula, step-by-step method and unit overview. Free tool.

Генератор на случайни числа

Generate random numbers in any range with or without repetition. Enter min, max, and count — see your random numbers instantly. Free.

Калкулатор за оценки

Calculate Grade quickly and accurately. Enter your values — see the result with the formula, worked example, and unit options. Free.

Калкулатор за матрица 2×2

Determinant, inverse, addition and multiplication of 2×2 matrices. See formula, step-by-step solution and all rearrangements. Instant math solver.

Теорема на Питагор

Apply the Pythagorean theorem to find any side of a right triangle. Enter two sides — get the missing side with proof shown. Free.

Калкулатор за тригонометрични функции

Calculate trig function values for any angle. Enter degrees or radians — see sin, cos, tan, cot, sec, csc with unit circle position. Free.