Math
Math calculators
Calculators for percentages, proportions, geometry and everyday math problems.
Percentage calculator
Calculate percentages, discounts, increases and changes between values instantly.
Use ->Rule of three calculator
Solve direct and inverse proportions with step-by-step work and verification.
Use ->GCD and LCM calculator
Calculate the greatest common divisor and least common multiple with steps and prime factors.
Use ->Quadratic equation calculator
Solve quadratic equations with the discriminant, real or complex roots, vertex and steps.
Use ->2x2 system of equations calculator
Solve a 2x2 linear system with determinants, Cramer's rule and verification.
Use ->Basic statistics calculator
Calculate mean, median, mode, range and frequencies for a list of numbers.
Use ->Grade average and GPA calculator
Calculate simple and weighted averages, approximate GPA and the grade needed for a target.
Use ->Minimum grade calculator
Calculate the grade needed on a pending assessment to pass or reach a target.
Use ->Weighted grade calculator
Calculate accumulated and projected grades from weighted assessments and a target.
Use ->Study hours calculator
Calculate daily study hours, sessions and a weekly plan before a deadline.
Use ->School attendance percentage calculator
Calculate attendance percentage, available absences and classes needed to meet a minimum.
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