Scientific calculator online
Like the calculator from school, only clearer: you see the expression the way you would write it in a notebook, get an exact answer and a decimal, and can ask for an explanation.
A scientific calculator for students: what is here?
The calculator is built like a high-school scientific calculator: the four operations, parentheses, powers and roots, sine, cosine and tangent and their inverses, base-10 and natural logarithms, factorials, permutations and combinations, absolute value, percent and memory. What is different is that the expression appears the way you write it in a notebook, with a real fraction and a root with a bar over it, and you can go back to any place in the expression and fix it.
For example, type sin(60). The calculator shows √3/2 and, underneath, 0.8660254038. Another example: 0.1 + 0.2 gives exactly 0.3, without the odd leftovers some online calculators show. And for 2 + 3 × 4, the "How did we get this?" button shows that multiplication comes first and only then addition.
The extra tabs hold tools that hide in menus on an ordinary calculator: calculating with fractions and mixed numbers, solving linear and quadratic equations and a system of two equations, drawing graphs with intersection points, the mean, median and standard deviation of a list of numbers, a unit converter and percent.
Frequently asked questions
How do I switch between degrees and radians?
Press the DEG/RAD switch at the top of the calculator. It starts in degrees, the way most schools teach, so sin(30) = 0.5. In radians, sin(π÷6) gives the same result.
Why is my answer shown as a fraction or with a root?
When the result is a simple fraction, a root or a multiple of π, the calculator shows it exactly, for example ¾ or 2√2, with the decimal value underneath. The S⇔D button switches between them, and a b/c shows a mixed number.
In what order does the calculator work?
By the order of operations: parentheses, powers and roots, multiplication and division from left to right, and finally addition and subtraction. Implied multiplication such as 2π binds more tightly than division, so 1÷2π means 1 divided by 2π. The "How did we get this?" button shows every step.
What do I do when an error message appears?
The message names the problem and marks the spot in red in your expression, for example "Division by zero" or "Square root of a negative number". Move the cursor with the arrows or tap the expression and fix it without retyping everything.
How do I solve a quadratic equation?
In the Equations tab choose Quadratic (ax² + bx + c = 0) and enter the coefficients. You get the discriminant, both solutions in exact form and as decimals, the vertex of the parabola, and a button to see it on a graph.
Are my history and memory saved?
Yes, but only in your own browser. Once the page has loaded, the calculator also works without an internet connection. There are no ads and no sign-up.
Explore more: all free tools, and the QR code maker.