Basic Math calculators
Percentages, averages, GPA and everyday arithmetic.
This category covers the arithmetic people actually reach for day to day — working out a percentage, averaging a set of numbers, simplifying a fraction, or converting a grade point average — rather than the symbolic algebra you'd use a scientific calculator for.
If you're doing calculus, matrix algebra, or trigonometry, the Scientific calculators are the better fit. Everything below is arithmetic you can check by hand if you wanted to — these tools just do it faster and show the working.
Percentage Calculator
Free Percentage Calculator online. Find percentages, percentage increase, percentage decrease, and percentage change quickly and accurately.
GPA Calculator
Free GPA Calculator to calculate your Grade Point Average online. Convert letter grades and credit hours instantly with accurate results.
Average Calculator
Free Average Calculator. Calculate the average (mean), median, and mode of any set of numbers quickly and accurately online.
LCM & GCF Calculator
Free LCM and GCF Calculator. Find the Least Common Multiple and Greatest Common Factor of two or more numbers instantly.
Fraction Calculator
Free Fraction Calculator to add, subtract, multiply, and divide fractions online, with results automatically simplified to lowest terms.
How to choose the right calculator
- Find a percentage, a percentage change, or reverse a discount → Percentage Calculator
- Average, median or mode of a list of numbers → Average Calculator
- Simplify or combine fractions → Fraction Calculator
- Find a common denominator or the largest shared factor of two numbers → LCM & GCF Calculator
- Work out a semester or cumulative GPA from grades and credits → GPA Calculator
Frequently asked questions
For most arithmetic homework — percentages, averages, fractions — the calculator matching that specific operation is quickest, since it shows the formula and a worked example alongside the answer, not just a number. For algebra or trigonometry, use the Scientific Calculator instead.
Each one shows the formula it uses and a worked example on its own page, so you can check the method as well as the result — that's on the individual calculator pages, not repeated here.
It's grouped here under Basic Math since it's fundamentally a weighted-average calculation. If you're looking for it specifically, search "GPA" from any page.