Just start typing.
Use the buttons or your keyboard. Enter a number, choose an operation, then enter the next number. Press = to get your answer.
Online calculator.
Big ideas. Little sums. A clearer way to calculate.
Let’s work it out
A clear head starts with a clear answer.
A little less mental math.
15-digit precision. Zero distractions.
Try a little math
A little help with everything.
Pick your next calculation. We’ll keep it simple.
Calculators
Converters
WeightKilograms, pounds, ounces and more.LengthFrom millimeters to miles.VolumeLiters, cups and clearly labeled gallons.TemperatureCelsius, Fahrenheit and Kelvin.AreaSquare feet, acres and everything between.SpeedMiles per hour, kilometers per hour and knots.Time zonesDifferent cities. The very same moment.
Made for whatever
your day adds up to.
A quick total, a split bill, a little number-checking. All the essentials, right where you need them.
Keep your train of thought.
Your last 10 calculations are saved in this browser. Select an entry to recover the calculation, even after a reload. Clear your history whenever you like.
A few thoughtful extras.
Copy a result, save a number in memory, or switch to scientific functions. Use dark mode when your day runs a little late.
Real life, in numbers.
Small calculations. One less thing to think about.
Split a dinner bill
128 ÷ 432 eachFind a 15% tip
80 × 15%12Take 20% off a price
200 − 20%160A little more clarity.
How does this online calculator work?
It works like a pocket calculator: operations are evaluated as you enter them, from left to right. For example, 2 + 3 × 4 gives 20, not 14. For expressions with different precedence, calculate the multiplication first and reuse that result.
How do I calculate a percentage?
To find 15% of 80, enter 80 × 15 % =. To increase 200 by 10%, enter 200 + 10 % = for 220. To take 10% off, enter 200 − 10 % = for 180. With addition and subtraction, % uses the first number as its base.
How accurate are the results?
The calculator uses decimal arithmetic with 30 significant digits internally and displays up to 15 significant digits. Each completed result is rounded to that display precision before reuse. Repeating decimals and scientific functions are approximations. Check critical financial or engineering calculations independently.
What do the memory buttons do?
M+ adds the displayed number to memory. M− subtracts it. MR recalls the saved number, and MC clears memory. AC resets the current calculation without clearing memory or history.
Are my calculations saved or shared?
No calculations are sent to us. Your last 10 calculator results and each tool's last 10 saved queries remain in this browser until you clear them. Memory buttons keep a number only while the page is open. On a shared device, clear history when you are finished. Read the privacy details.
Is there a scientific calculator?
Yes. Select Scientific above the keypad or open the scientific calculator for square roots, powers, logarithms, factorials and trigonometry in degrees or radians.