Scientific Calculator
A full scientific calculator in your browser: type an expression or tap the keys and see the result as you go — trig, logs, powers, roots and more.
- Trig, log, powers
- Live result
- History
- Keyboard input
Type on your keyboard or tap the keys; Enter gives the result. More functions by typing: root(x; n), log(x; base), mod(a; b), min( ), max( ), nCr(n; r), nPr(n; r), sinh, cosh, tanh, floor, ceil, round.
History
How to use the scientific calculator
Write the whole expression, read the answer.
- 1
Type or tap
Enter the calculation as you would write it, for example 2 × (3 + 4)² or sin(30) + √16.
- 2
Check the angle unit
Choose DEG, RAD or GRAD before using sin, cos and tan.
- 3
Press = to keep the result
The answer appears live; = or Enter stores it in the history and makes it available as Ans.
Everything a pocket calculator does — and you can see what you typed
For school, study, engineering and everyday sums.
Full expression input
Brackets, nested functions and implicit multiplication such as 2π or 3(4 + 5) are understood.
Trigonometry
sin, cos, tan, their inverses and the hyperbolic functions, in degrees, radians or gradians.
Logs and powers
Natural log, log base 10 or any base, powers, square and cube roots and any n-th root.
Live result
The answer updates with every keystroke, and an unfinished expression is explained instead of failing.
History and Ans
Reuse earlier calculations with a tap and continue with the last answer.
Keyboard friendly
Type on a physical keyboard; × ÷ − ^ and function names are all accepted.
Made for phones
Large fields, the right keyboard for numbers and a layout that fits small screens.
Private and safe
Expressions are evaluated by a built-in parser in your browser; nothing is sent to a server.
Getting the right answer from a scientific calculator
The calculator follows the standard order of operations: brackets first, then powers and roots, then multiplication and division from left to right, then addition and subtraction. So 2 + 3 × 4 is 14, not 20, and −2² is −4 because the power is applied before the minus sign; write (−2)² for 4. Powers group from the right: 2^3^2 is 2^9 = 512.
Most wrong trigonometry answers come from the angle unit. sin(30) is 0.5 in degrees but −0.988 in radians. A full circle is 360°, 2π radians or 400 gradians; school geometry normally uses degrees, calculus and physics use radians. The selected unit also applies to the results of sin⁻¹, cos⁻¹ and tan⁻¹.
There are two common logarithms: “log” is base 10 and “ln” is base e (2.71828…). For another base, type log(x; base) — log(8; 2) is 3. Very large and very small results are shown in scientific notation, where 1.5 × 10^8 means 150,000,000. Like every calculator, this one works with about 15 significant digits, so tiny rounding differences are normal.
Functions you can type
| Input | Meaning | Example |
|---|---|---|
| sqrt(x), √x | Square root | √(16) = 4 |
| x^y | Power | 2^10 = 1024 |
| root(x; n) | n-th root | root(27; 3) = 3 |
| log(x; b) | Logarithm to base b | log(8; 2) = 3 |
| n! | Factorial | 5! = 120 |
| nCr(n; r) | Combinations | nCr(5; 2) = 10 |
Tips
- Solving for x instead of evaluating? Use the Equation Calculator.
- For exact results with fractions, the Fraction Calculator keeps numerators and denominators.
- Mean, median and standard deviation of a list are quicker in the Average Calculator.
- When in doubt, add brackets. They never change a correct calculation, and they prevent most order-of-operations mistakes.
Frequently asked questions
Can’t find your answer? Contact us — we reply quickly.
How do I switch between degrees and radians?
Use the DEG / RAD / GRAD selector above the keys. The setting applies to sin, cos, tan and to the angles returned by the inverse functions.
Why do I get a different answer than expected for −2²?
By convention the power is calculated before the minus sign, so −2² = −(2²) = −4. Write (−2)² to square the negative number.
How do I enter a percentage?
Use the % key. On its own it divides by 100 (50% = 0.5); after + or − it works like a pocket calculator, so 200 + 10% gives 220.
What does Ans do?
Ans inserts the result of the last calculation you confirmed with = or Enter, so you can continue working with it.
Is my calculation history stored?
Only on your own device, so it is still there when you come back. Use “Clear” to delete it. Nothing is sent to a server.
How precise are the results?
Calculations use double-precision floating point, about 15 to 16 significant digits. Results are rounded to 12 digits for display.
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