Our math calculators go beyond just giving you an answer - they show their work. Whether you're simplifying fractions or figuring out the grade you need to hit your GPA target, each tool walks you through the calculation step by step so you actually understand the result.
Fractions trip up a lot of people because the rules differ by operation. Adding and subtracting requires a common denominator; multiplication is straightforward but easy to mis-simplify; division requires flipping the second fraction. Our fraction calculator handles all four operations and always reduces the result to its simplest form using the greatest common divisor (GCD).
The step-by-step breakdown shows exactly how the common denominator was found, how the numerators were combined, and how the result was simplified - making it useful both as a quick solver and as a learning tool.
The GPA calculator works in two modes. In Calculate GPA mode, you enter each course's credit hours and letter grade, and the calculator computes your weighted GPA on a 4.0 scale. In Required Grade mode, you enter your current GPA and credit hours plus an upcoming course, and the calculator tells you exactly what grade you need in that course to reach a target GPA.
It uses the standard 4.0 scale with plus/minus grades (A+ = 4.0, A = 4.0, A− = 3.7, B+ = 3.3, and so on down to F = 0.0), which is the scale used by most US colleges and universities.
GPA is a weighted average where heavier courses (more credit hours) count more toward the final number. The formula is:
GPA = Σ(grade points × credit hours) ÷ Σ(credit hours)
For example, an A (4.0) in a 3-credit course contributes 12 quality points, while a B (3.0) in a 4-credit course contributes 12 quality points as well - making them equal weight despite the different grades.
Yes. You can enter a whole number part alongside the numerator and denominator. The calculator converts the mixed number to an improper fraction before performing the operation, then converts the result back to a mixed number if applicable.
The standard US 4.0 scale with plus/minus grades. If your institution uses a different scale (such as 4.3 for A+), the results will differ slightly. Check your school's grading policy for exact grade point values.
Yes - simply add all courses from all semesters into the course table. The calculator treats the full list as one weighted average, which is exactly how cumulative GPA is computed.
Find the greatest common divisor (GCD) of the numerator and denominator, then divide both by it. For example, 8/12 has a GCD of 4, so 8÷4 = 2 and 12÷4 = 3, giving the simplified fraction 2/3.