Math Calculators
These math calculators cover school, work, and everyday arithmetic: adding and simplifying fractions, finding percentages and percentage change, statistics like standard deviation and probability, and a full scientific calculator with trigonometry and logarithms. For students, the Grade Calculator works out the score you need on a final exam, and the GPA Calculator handles weighted, unweighted, and cumulative GPA.
The Fraction Calculator handles mixed numbers and converts decimals to fractions, the Percentage Calculator covers percent-of, percentage change, and adding or subtracting a percentage, and the Standard Deviation Calculator gives both the sample and population results. Each page also explains the formula behind the answer, so you can check homework or follow the method.
- Fraction Calculator
Add, subtract, multiply, or divide fractions, and convert decimals to fractions.
- Scientific Calculator
A full scientific calculator with trig, logs, exponents, and memory.
- Standard Deviation Calculator
Calculate mean, variance, and sample or population standard deviation.
- Probability Calculator
Calculate the probability of single, combined, and conditional events.
- Grade Calculator
Find out what score you need on your final, or calculate a weighted average.
- GPA Calculator
Calculate your GPA — weighted and unweighted, with cumulative terms rolled in.
- Percentage Calculator
Calculate percentages, percentage change, and add or subtract a percentage.
- Average Calculator
Find the mean, median, mode, and range of a list of numbers, plus weighted averages.
- Random Number Generator
Pick random numbers in any range, draw names from a list, roll dice, or flip a coin.