Calculators & Math
Calculators & Math Tools
Percentage Calculator
Calculate percentage changes, differences, and fractions.
CGPA Calculator
Calculate Cumulative Grade Point Average across semesters.
CGPA to Percentage Converter
Convert university CGPA scores to equivalent percentage marks.
GPA Calculator (4.0 Scale)
Calculate high school and college GPA with weighted credit hours.
Date Difference Calculator
Calculate exact days, weeks, months between two dates.
Mode & Frequency Calculator
Find statistical mode and value frequencies in data sets.
Standard Deviation Calculator
Calculate population and sample standard deviation and variance.
Probability Calculator
Calculate single event chances, joint probabilities, and odds.
Permutations & Combinations (nPr / nCr)
Calculate factorial permutations and combinations.
Factorial Calculator (n!)
Compute exact factorials for large integer numbers.
Matrix Arithmetic & Determinant Solver
Perform matrix addition, multiplication, transpose, and determinant.
Quadratic Formula Equation Solver
Solve quadratic equations ax² + bx + c = 0 with step explanation.
Fraction to Decimal Converter
Convert proper, improper, and mixed fractions to decimals.
Ratio & Proportion Calculator
Solve missing proportions a:b = c:d and ratio splits.
Geometry Area & Perimeter Calculator
Calculate area and perimeter for circles, triangles, rectangles.
Local-first by design
Every tool on this page runs entirely in your browser. Your files and data never leave your device — no uploads, no server processing, no tracking. Works offline after first load.