Basic or scientific calculator?
A basic calculator covers daily math: adding up a grocery bill, splitting rent, finding a discount. A scientific calculator adds sine, cosine, tangent, logarithms, square roots and exponents, which is what a trig class or an engineering job calls for. Both live on the scientific calculator page.
Some questions have a faster path than the keypad. For a sale price or a markup, try the percentage calculator. To split a restaurant check, use the tip calculator.
Popular calculators
People most often look for a BMI calculator to check a healthy weight range, a due date calculator to see how many weeks pregnant they are, and a compound interest calculator to see how savings grow over time. Students use the GPA calculator to track a grade point average on the 4.0 scale.
Need to run a bigger what-if on a loan or a home purchase? Head to the simulators for mortgage, auto loan and credit card payoff scenarios.
Frequently asked questions
How do I use the online calculator?
Type numbers and operations with your keyboard, or tap the on-screen keys. The answer shows below the equation as you type, and pressing Enter saves the value to your history.
What is the difference between a basic and a scientific calculator?
A basic calculator handles the four operations, percentages and parentheses. A scientific calculator adds trigonometry, logarithms, square roots, exponents and the constant pi.
Does the calculator work on my phone?
Yes. The keys resize to fit the screen, and you can also type with your phone's number pad.
Are my calculations saved?
The history stays in your browser only. Nothing you type is sent to or stored on a server.
How do I calculate a percentage on a calculator?
Type the amount, the operator and the percentage. For example, 1000 + 10% equals 1,100, and 200 × 15% equals 30.