Scientific CalculatorNEW
Trigonometry, logs, powers, memory keys and a running history
Checking your access…
AllFreeTool is a free online scientific calculator with a numeric keypad, trigonometric and logarithmic functions, an angle-unit switch, and memory cells for storing a value and recalling it later. It also shows the result in scientific notation and keeps a history of past calculations. The whole thing works offline in your browser, with nothing installed and nothing uploaded.
It suits lab work, engineering quick checks, exam preparation, or any moment when a phone calculator will not do the job. Factorials are supported up to 169, and the display makes it easy to see both the decimal and the exponent form of a very large or very small number.
Why use Scientific Calculator on AllFreeTool?
Scientific Functions
sin, cos, tan, log, ln, sqrt, abs, exp, and factorial up to 169 for quick maths.
Angle Unit Switch
Toggle between degrees and radians and watch every function follow the current mode.
Memory Cells
Store a result in the memory register, recall it later, or clear it when you are done.
Scientific Notation
See the exponent form of very large or very small results next to the decimal value.
How to use Scientific Calculator
Set the Mode
Choose degrees or radians, and note the keypad and function keys above the display.
Run the Calculation
Enter numbers and functions with the keypad or your keyboard, then confirm the result.
Store or Review
Save the value in memory if you need it again, or check the calculation history below.
Common questions
What can the scientific calculator actually compute?＋
It handles the four basic operations, exponentiation, modulo, parentheses, sin, cos, tan, asin, acos, atan, log, ln, sqrt, abs, exp and factorial, together with the constants pi and e. Evaluation happens locally in your browser, so no calculation is ever sent to a server.
Why is there a limit on the factorial?＋
Factorial is only defined for whole numbers up to 169, because 170 factorial and beyond exceed the largest number a browser can represent exactly. Asking for a larger one produces an error message instead of a silently wrong value, which is why the tool refuses rather than guessing.
How do I use the memory cells?＋
The display offers a store button to keep the current result, a recall button to bring it back into the calculation, and a clear button to empty the register. The memory panel always shows what is currently held, so you know whether a stored value is available.
Is anything sent to the network?＋
No. The calculator is a self-contained expression engine that runs inside the page, with no server call anywhere in the flow. That also means it keeps working without an internet connection and that numbers you compute are not recorded by us.