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100+ Free Calculators

Free Online Calculators

Financial, Health, Math & more — instant results, no signup needed.

Frequently Asked Questions

What is the best free GPA calculator for students?

Megrix's GPA Calculator lets students add each course's grade and credit hours to instantly get their weighted GPA and letter grade — free, no signup.

How do I calculate my grade with weighted assignments?

Use the Grade Calculator: enter each assignment's score, total points, and weight percentage, and Megrix calculates your overall weighted grade and letter grade automatically.

What calculators are useful for math homework?

Megrix's Math category includes a Scientific Calculator, Fraction Calculator, Quadratic Formula, Pythagorean Theorem, Standard Deviation, and 25+ more tools built for schoolwork.

Are Megrix calculators free for students?

Yes, every calculator on Megrix — including GPA, Grade, Scientific and Percentage calculators — is 100% free with no signup or watermark.