Calculators
Free online calculators for students, teachers, parents and listeners. Pick a tool below. Everything runs in your browser and nothing you type is stored.
Audiobook Speed Calculator
See how long an audiobook takes at different playback speeds and how much listening time you save at 1.25x, 1.5x or 2x.
Open calculator →GPA & CGPA Calculator
Work out your semester GPA and your cumulative CGPA from course grades and credit hours.
Open calculator →Test Grade Calculator
Turn the number of correct or wrong answers on a test into a percentage score and letter grade.
Open calculator →Percentage Calculator
Find a percentage of a number, percent increase or decrease, marks percentage, and convert between percent, decimal and fraction.
Open calculator →About QuickGrade calculators
QuickGrade is a collection of simple, fast calculators built for real classrooms and everyday use. They work on phones, tablets, Chromebooks and laptops, load quickly, and need no account.
Results are for guidance. Please confirm official grades and GPA rules with your school, college or university.
Frequently asked questions
Are these calculators free?
Yes. All QuickGrade calculators are free, need no signup, and have no usage limits.
Do the calculators work on mobile?
Yes. They are built mobile-first and work on any phone or tablet without installing anything.
Does QuickGrade store my data?
No. Calculations run in your browser and nothing you type is uploaded, saved or shared.
Can I suggest a new calculator?
Yes. Send us your idea from the Contact page.