Academic Calculators

GPA, CGPA, percentage, age and other academic calculators.

Age Calculator

Calculate your exact age in years, months, days, hours, and minutes.

Calculate your CGPA and convert it to percentage for all major grading systems.

Calculate your GPA on a 4.0 or 10-point scale from letter grades.

Calculate your overall grade from assignment, test, and exam scores with custom weights.

Convert marks to percentage and find the marks needed for a target percentage.

Solve any percentage problem — find %, find value, find whole, or percentage change.

Calculate the percentage error between an experimental and theoretical value.

Determine the minimum sample size needed for a statistically valid survey or study.

Full-featured scientific calculator with trig, log, exponents, and constants.

Add, subtract, or convert time between hours, minutes, seconds, and days.