CalcCommonsEducation & Math Calculators
Find the right approach for grades, arithmetic, algebra, and descriptive statistics.
Grades & GPA
Use Grade Calculator to combine assignment scores, Final Grade to work backward from a target, and GPA to weight grade points by credits. These calculations answer different questions; check which grading policy applies before entering your values.
Grade Calculator
Calculate your class grade from points or weighted assignments, or find a test grade from questions missed.
Final Grade Calculator
Find the final exam score you need from percentage or letter-grade goals.
GPA Calculator
Calculate term, cumulative or full-year GPA. Combine completed terms by GPA credits and plan your next goal.
Fractions & percentages
Use fractions when exact ratios matter. Percentages express a ratio per hundred and help compare changes. Long division shows where quotient digits and remainders come from. Percent Error compares a measurement with a reference in the same unit.
Fraction Calculator
Add, subtract, multiply, divide, and convert fractions, mixed numbers, and decimals.
Percentage Calculator
Solve percent-of, percentage change, reverse percentage, and percentage difference problems.
Long Division Calculator
Divide nonnegative whole numbers with a quotient, remainder, and generated division steps.
Percent Error Calculator
Compare a measured value with a reference value and find absolute percentage error, signed difference and direction.
Algebra & geometry
Factor integers or rational quadratics, convert powers of ten, and solve the dimensions of a right triangle. Each tool states the types of expressions and inputs it supports. LCM finds the smallest shared multiple; Quadratic Formula finds real or complex roots beyond rational factorization.
Scientific Notation Calculator
Convert standard and scientific notation and calculate with positive or negative exponents.
Factoring Calculator
Find integer factors, greatest common factors, and rational factors of quadratic trinomials.
Right Triangle Calculator
Solve a right triangle from two sides or one side and an acute angle.
LCM Calculator
Find the least common multiple of two or more integers, with exact answers and Euclidean-algorithm steps.
Quadratic Formula Calculator
Solve ax² + bx + c = 0 for real or complex roots, with the discriminant, vertex and a curve preview.
Statistics basics
Average focuses on the arithmetic mean and totals. Mean Median Mode compares measures of center and shows frequency ties. Neither tool makes assumptions about a population from your sample.