These math calculators show the working, not just the answer, so they double as a way to check your method. The percentage calculator handles all three standard percentage problems, the fraction calculator adds, subtracts, multiplies and divides fractions with a step-by-step solution, and the average calculator returns mean, median, mode and range from any list.
Math & Academic
Math & Academic Calculators
8 free math & academic calculators — each with its own page, the formula explained, a worked example and FAQs.
All Math Calculators
Percentage Calculator
Percentage of a number, increase and decrease
GPA Calculator
Calculate cumulative GPA on the 4.0 scale
Grade Calculator
What score do you need on your final exam?
Average Calculator
Mean, median, mode and range of numbers
Fraction Calculator
Add, subtract, multiply and divide fractions
Ratio Calculator
Simplify ratios and solve proportions
Probability Calculator
Calculate probability for single and multiple events
Scientific Notation Calculator
Convert numbers to and from scientific notation
How to choose the right calculator
For students, the GPA calculator computes a weighted grade point average across unlimited courses on the 4.0 scale, and the grade calculator tells you exactly what score you need on a final exam to reach a target. The ratio calculator and probability calculator round out the set for proportion and chance problems. Check your units and input format before relying on any result for an exam or assignment.
Frequently Asked Questions
Yes. Enter credit hours for each course to get a weighted GPA on the 4.0 scale. Leave credit hours equal for a simple unweighted average.
Yes. It has three modes: what is X% of Y, X is what percent of Y, and the percentage change between two numbers.
The fraction, ratio and scientific-notation calculators show the full working. Others show the formula used plus a worked example on the page.