Education
Calculators for students: grades, weighted average, final exam grade needed and more.
Tools in this category
Area and perimeter calculator Compute the area and perimeter of squares, rectangles, circles, triangles and trapezoids: enter the dimensions and get exact results instantly, free. Fraction calculator (with steps) Add, subtract, multiply, and divide fractions with steps: LCM of denominators, GCD simplification, mixed numbers, negatives, and the exact decimal. Logarithm calculator Compute the base-10 logarithm, the natural log (ln) and the logarithm in any custom base of a number instantly, shown with 6 significant figures. Final grade calculator Find out exactly what score you need on your final exam to pass or hit your goal grade: enter your current grade and the exam weight. Free and instant. Ratio and proportion calculator Solve proportions A:B = C:D for the missing term by cross multiplication and reduce ratios to lowest terms with the GCD, plus their decimal value. Combinations and permutations calculator Compute combinations C(n,r), permutations P(n,r) and the factorial n! with exact BigInt precision. Learn when order matters. Free, no sign-up. Number base converter Number base converter: change integers between binary, octal, decimal, hexadecimal and any base from 2 to 36 instantly. Free, client-side, no sign-up. Standard deviation calculator Get population and sample standard deviation with every step shown: mean, deviation table, sum of squares, variance and coefficient of variation. Quadratic equation solver Solve quadratic equations ax²+bx+c=0 with the general formula: real or complex roots, plus the discriminant and vertex computed instantly. Free, no sign-up. Prime factorization calculator Break a positive integer (2 to 10^12) into its prime factors with exponents, e.g. 360 = 2^3 x 3^2 x 5, and find out if it is prime. Free, in your browser. Fraction to decimal (and back) Convert a fraction to a decimal and a decimal back to a fraction: spot repeating decimals like 1/3 = 0.(3) and simplify with the GCD. Free, no sign-up. GCF and LCM calculator Find the GCF (greatest common factor) and LCM (least common multiple) of two or more numbers using the Euclidean algorithm, shown step by step. Free. Mean, median and mode calculator Paste your numbers and get the mean, median, mode, range, sum, count and standard deviation (population and sample) at once. Free, no sign-up. What do I need on the final exam Find the score you need on your final exam to pass: enter your current average and the exam weight. Includes scales for Mexico, Chile, Peru and Spain. Scientific notation converter Convert between decimal, scientific, engineering and E notation. Type 0.00042 or 4.2e-4 and get every equivalent form instantly. Free, no sign-up. Weighted average calculator Compute your weighted average using weights or credits: add grade-and-weight rows and see the result and total weight update live. Free, no sign-up. System of equations solver (2x2) Solve a 2x2 linear system with Cramer’s rule: enter a1, b1, c1, a2, b2, c2 and get x, y, the determinant and the full step-by-step. Free, no sign-up. Pythagorean theorem calculator Solve the Pythagorean theorem a²+b²=c²: enter two sides to get the third, plus the right triangle area and perimeter. Free, instant, no sign-up.