This free scientific calculator handles everything from simple sums to trigonometry, logarithms, powers, roots and factorials. Click the keypad or type the whole expression, such as 2sin(30)+√16, and the answer previews live as you type. Press = or Enter to fix the result and add it to the history.
Switch between degrees and radians with one tap, reuse the last answer with Ans, and click any line in the history to load it again. Brackets that you forget to close are closed for you, and numbers like 2π or 3(4+1) are multiplied automatically, just like on a handheld calculator.
How to use the Scientific Calculator tool
- Choose DEG for angles in degrees or RAD for radians.
- Click the keys or type an expression, for example
sin(45)^2 + cos(45)^2. - Watch the live preview under the expression while you type.
- Press = or Enter to get the final answer and save it to the history.
- Use Ans to continue with the last result, or click a history line to edit it.
Why use ToolOrca Scientific Calculator
- Trigonometry, inverse trig, ln, log and log2
- Powers, roots, factorials, percent, π and e
- Degree and radian modes
- Live preview and clickable history
- Correct order of operations with brackets
- Works with a physical or phone keyboard
Order of operations
The calculator follows the standard order: brackets first, then powers and roots, then multiplication and division, then addition and subtraction. Powers are worked out from right to left, so 2^3^2 is 2⁹ = 512.
A minus sign in front of a power applies to the result, so -2^2 gives −4. Type (-2)^2 if you want 4. This matches how mathematicians and most scientific calculators read the expression.
Functions you can type
sin cos tan asin acos atan sinh cosh tanh for trigonometry, ln for the natural log, log for base 10, log2( for base 2, sqrt or √, cbrt or ∛, abs and exp. Use ^ for powers, ! for factorial and % to divide by 100.
Results are shown to 12 significant digits. Very large or very small numbers switch to scientific notation, for example 6.02214076e23.
Frequently asked questions
How do I switch between degrees and radians?
Tap DEG or RAD above the display. In degree mode, sin(30) is 0.5 and sin(180) is exactly 0. In radian mode, use π, for example sin(π/6) = 0.5.
Why does −2² give −4?
Powers are calculated before the minus sign, so −2² means −(2²) = −4. Put the number in brackets, (-2)^2, to square the negative number and get 4.
How do I calculate a square root or cube root?
Press √ or ∛ and then the number, for example √(81) = 9 or ∛(27) = 3. For other roots, use a fractional power: the 4th root of 16 is 16^(1/4) = 2.
What does Ans do?
Ans holds the last answer you got with =. After a result, pressing an operator such as + or × continues from it automatically.
Can I type with my keyboard?
Yes. On a computer, type straight into the display and press Enter for =. On a phone the calculator keypad is used by default; tick Use my phone keyboard if you prefer typing.