Math calculators

Solve equations, convert units, and summarize data sets.

Quadratic equation solver

Solve ax² + bx + c = 0 for real or complex roots.

a

b

c

Roots

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Enter coefficients a, b, c.

Mean & median calculator

Paste a list of numbers separated by commas to get quick statistics.

Numbers (comma-separated)

Summary

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Enter a list of numbers.

GPA calculator

Enter letter grades and credit hours for up to 6 courses to get your weighted GPA.

Grade

Credit hours

Grade

Credit hours

Grade

Credit hours

Grade

Credit hours

Weighted GPA

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Enter grades and credit hours above.

Percentage-to-letter-grade converter

Convert a numeric score to a standard US letter grade.

Score (%)

Letter grade

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Enter a score between 0 and 100.

Scientific calculator

Basic operations, powers, and square roots.

0

Frequently asked questions

What does the quadratic solver do with complex roots?

When the discriminant (b²-4ac) is negative, the equation has no real solutions. The calculator shows the complex roots in the form a ± bi.

Is the GPA calculator based on a 4.0 scale?

Yes, it uses the standard US 4.0 unweighted scale. Some schools use different scales or weight honors/AP courses differently — check with your institution for official calculations.