Math Calculators
Free calculators for percentages, fractions, ratios, statistics, factorials, attendance, and scientific functions. Fast results for students and work.
EXPLORE TOOLS
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Scientific Calculator
Full-featured scientific calculator
Fraction Calculator
Add, subtract, multiply, divide fractions
Percentage Calculator
Calculate percentages and changes
Ratio Calculator
Simplify ratios and solve equivalent ratios
Permutation and Combination Calculator
Calculate permutations and combinations for n and r
Mean, Median & Mode Calculator
Find mean, median, mode, range, and sum of a dataset
Standard Deviation Calculator
Calculate population and sample standard deviation
CGPA to Percentage Calculator
Convert CGPA to percentage using common grading formulas
GPA Calculator
Calculate GPA from course grades and credit hours
Factorial Calculator
Calculate the factorial of a non-negative integer
Attendance Calculator
Calculate attendance percentage and future classes needed or available to miss
WHY USE CALCORA
From everyday numbers to advanced math.
Handle everyday math, ratios, permutations and combinations, statistics, GPA and CGPA conversions, or use the scientific calculator for more advanced calculations — all directly in your browser.