Tính toán thông minh hơn mỗi ngày

Máy tính Cơ bản

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

Máy tính Phần trăm

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

Công thức Bậc hai

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

Máy tính Tiền tip

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.

Máy tính Giảm giá

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

Trung bình, Trung vị và Mode

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

Máy tính Điểm bài thi

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

Sinh số ngẫu nhiên

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

Máy tính Điểm số

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

Máy tính Ma trận 2×2

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

Định lý Pythagoras

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

Máy tính Hàm Lượng giác

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