Skip to content
All calculators

Scientific Calculator

A full scientific calculator with trig, logarithms, powers and memory.

Calculator

DEGM: 0.00 · Ans: 0
 
0

Usage tips

Click a tile to try these examples — they demonstrate the supported functions, constants and operators. Make sure the Deg/ Rad toggle matches the example you want.

  • sin(30)
    = 0.5
    Trigonometry (Deg mode)
  • cos(60)
    = 0.5
    Trigonometry (Deg mode)
  • log(100)
    = 2
    Common log (base 10)
  • ln(e)
    = 1
    Natural log
  • 2^10
    = 1024
    Powers
  • 5!
    = 120
    Factorial (postfix)
  • sqrt(144)
    = 12
    Square root
  • pi
    = 3.14159…
    Constant π
  • e
    = 2.71828…
    Euler's number
  • 10^3
    = 1000
    Exponential
  • 1/0
    = Error
    Division by zero handled

Features

  • Deg / Rad toggle
    Switch between degrees and radians for all trigonometric functions.
  • Memory keys (M+, M−, MR)
    Accumulate values into memory and recall them into the current expression.
  • Ans key
    Reuse the last evaluated result inside a new expression by typing Ans.
  • Keyboard support
    Type digits, operators, Enter (=), Backspace and Esc (AC) directly.

Reference

Functions
  • sin cos tan
  • asin acos atan
  • sinh cosh tanh
  • ln (natural log)
  • log (base 10)
  • sqrt cbrt
  • exp abs floor ceil round
  • fact / n!
Operators & constants
  • + − × ÷
  • ^ (power)
  • % (modulo)
  • ! (factorial)
  • ( ) grouping
  • pi (π ≈ 3.14159)
  • e (Euler ≈ 2.71828)
  • Ans (last answer)

What is the Scientific Calculator?

A scientific calculator is a free online tool that evaluates mathematical expressions including trigonometric functions (sin, cos, tan), logarithms (ln, log), powers, roots, factorials, and constants like π and e. Use it for algebra, calculus prep, physics, and engineering calculations — no download or sign-in required.

Scientific Calculator formula

Expressions are evaluated using the standard order of operations (PEMDAS): Parentheses → Exponents → Multiplication/Division (left-to-right) → Addition/Subtraction (left-to-right). Trigonometric functions accept degrees by default (switch to radians for calculus); log is base-10, ln is the natural logarithm (base e); n! = 1·2·3·…·n with 0! = 1; powers use a^b = exp(b·ln(a)); roots via sqrt(x) or x^(1/n).

How to use the Scientific calculator

  1. 1Tap buttons or type to build an expression — the live preview shows the evaluated result as you go.
  2. 2Use the DEG/RAD toggle to switch trig input between degrees (default) and radians.
  3. 3Insert constants with the π and e buttons; use ^ for exponents and ! for factorials.
  4. 4Press = to commit the result, AC to clear, or the back arrow to delete the last token.
  5. 5If the expression is undefined (e.g., 1/0, log(-1), asin(2)), the display shows 'Error' in red — fix the expression and re-evaluate.

Example calculation

Evaluate sin(30) + cos(60) − 2^3 in DEG mode. sin(30) = 0.5, cos(60) = 0.5, 2^3 = 8. Result = 0.5 + 0.5 − 8 = −7. The live preview confirms −7 instantly, including the proper order-of-operations handling of the exponent before the subtraction.

Frequently asked questions

How does the scientific calculator handle degrees vs radians?
By default, trig functions (sin, cos, tan) interpret their argument as degrees, which matches most homework problems. Toggle the DEG/RAD switch to radians for calculus work (derivatives and integrals of trig functions are defined in radians). Inverse trig functions (asin, acos, atan) return degrees in DEG mode and radians in RAD mode.
What is the order of operations used?
The engine follows standard PEMDAS: parentheses first, then exponents (^) and factorials (!), then multiplication and division left-to-right, then addition and subtraction left-to-right. So 10 − 4 × 2 = 2, not 12, because the multiplication is performed before the subtraction.
How is −2² evaluated?
As −(2²) = −4. The exponent operator binds tighter than unary minus, matching Google Calculator, Wolfram Alpha, and most math libraries. To square a negative number, write (−2)^2 = 4 explicitly.
What's the difference between log and ln?
log is the common logarithm base 10 (so log(100) = 2), and ln is the natural logarithm base e ≈ 2.71828 (so ln(e) = 1). Use ln for calculus and continuous-growth problems; use log for pH, decibels, and Richter-scale calculations.
Does the calculator support keyboard input?
Yes — type numbers, operators (+, −, *, /), parentheses, ^ for exponents, and the constants pi and e directly. The live preview re-evaluates on every keystroke so you can confirm the result before pressing =.

People also search for

  • online scientific calculator with sin cos tan
  • free scientific calculator no download
  • scientific calculator with fractions
  • degree to radian converter
  • natural logarithm calculator
  • factorial calculator
  • exponent calculator with e