What Is a Scientific Calculator?
A scientific calculator is an advanced mathematical tool designed to solve complex calculations in science, engineering, mathematics, and statistics. Unlike basic four-function calculators, scientific calculators include trigonometric ratios (sine, cosine, tangent), inverse trigonometry, logarithmic and exponential functions, power calculations, roots, factorials, and mathematical constants like π (pi) and e (Euler's number).
Our free online scientific calculator provides natural expression display, letting you build multi-step formulas with parentheses just as you would write them on paper. Whether you are working on trigonometry homework, calculus problems, or engineering estimations, this tool delivers instant, high-precision results directly in your web browser.
Key Functions & Operations
This scientific calculator includes a comprehensive suite of functions:
- Trigonometric:
sin(x),cos(x),tan(x)for calculating ratios of right-angled triangles. - Inverse Trigonometric:
sin⁻¹(x),cos⁻¹(x),tan⁻¹(x)to calculate angles from given trigonometric ratios. - Logarithms:
log(x)for base-10 logarithms andln(x)for natural logarithms (base e). - Powers & Roots:
x²(square),xʸ(custom power), and√(square root). - Factorials:
n!computes the product of all positive integers less than or equal to n. - Constants:
π(3.14159...) ande(2.71828...) for exact value substitution.
Understanding DEG vs RAD Mode
The mode toggle button in the top left allows you to switch between DEG (Degrees) and RAD (Radians) angle units:
- Degree Mode (DEG): A full circle is divided into 360 degrees. Standard for geometry, navigation, and introductory math classes (e.g.,
sin(90°) = 1). - Radian Mode (RAD): A full circle equals 2π radians. Standard for calculus, trigonometry proofs, physics, and theoretical mathematics (e.g.,
sin(π/2) = 1).
How to Use This Scientific Calculator
- Select Angle Unit: Click the
DEG/RADbutton to choose between degree and radian mode. - Build Your Expression: Click functions (like
sinorlog) or type on your keyboard. Type arguments inside parentheses. - Use Operators & Parentheses: Combine terms using
+,−,×,÷, and()for grouping. - Compute Result: Press
=or pressEnteron your keyboard to evaluate the expression. - Review History: Scroll down the history tape to review past calculations or click any entry to reload the result.
Worked Example
Let me walk you through calculating: sin(45°) + log(100) × 2.
1. Ensure angle mode is set to DEG.
2. Click sin, enter 45, and close with ). Display shows: sin(45) (which equals 0.7071...).
3. Press +, click log, enter 100, close with ). Display shows: sin(45) + log(100).
4. Press × and enter 2.
5. Press =. The calculator evaluates log(100) × 2 = 2 × 2 = 4, then adds sin(45°) ≈ 0.7071, producing the final answer: 2.7071067812.