Free Scientific Calculator Online — Sin, Cos, Log & More

Whether you're a student working through trigonometry homework, an engineer running quick calculations, or someone who just needs more than a basic calculator, our Scientific Calculator has you covered. It's free, works in your browser on any device, and handles everything from basic arithmetic to advanced functions.

What Makes a Scientific Calculator Different?

A basic calculator handles addition, subtraction, multiplication, and division. A scientific calculator goes much further:

Trigonometric functions — sin, cos, tan, and their inverses (arcsin, arccos, arctan)

Logarithms — log base 10 and natural log (ln)

Exponents and roots — powers, square roots, cube roots, nth roots

Factorials — n! calculations

Constants — π (pi) and e (Euler's number)

Parentheses — for controlling order of operations in complex expressions

Memory functions — store and recall values mid-calculation

Our Scientific Calculator includes all of these and more.

How to Use the Scientific Calculator — Step by Step

1. Go to cleverly.tools/tools/scientific-calculator 2. Use the on-screen buttons or your keyboard to enter your calculation 3. Press = or Enter to see the result 4. Use the AC button to clear the display and start over, or C/CE to clear just the last entry

For more complex expressions, enter the entire formula before pressing equals — the calculator follows standard order of operations (PEMDAS/BODMAS).

Key Functions Explained

Trigonometric Functions

| Function | What It Does | Example | |---|---|---| | sin | Sine of an angle | sin(30°) = 0.5 | | cos | Cosine of an angle | cos(60°) = 0.5 | | tan | Tangent of an angle | tan(45°) = 1 | | sin⁻¹ | Inverse sine (arcsin) | sin⁻¹(0.5) = 30° | | cos⁻¹ | Inverse cosine (arccos) | cos⁻¹(0.5) = 60° | | tan⁻¹ | Inverse tangent (arctan) | tan⁻¹(1) = 45° |

Make sure to switch between degrees and radians depending on what your calculation requires. Most high school math uses degrees; calculus and physics often use radians.

Logarithms

log — Logarithm base 10 (common log). Used in chemistry (pH), acoustics (decibels), and engineering.

ln — Natural logarithm (base e). Used in calculus, finance (compound growth), and physics.

10^x — The inverse of log. Raises 10 to the power of x.

e^x — Raises Euler's number (≈2.71828) to the power of x.

Exponents and Roots

x² — Squares the current value

x³ — Cubes the current value

xʸ — Raises x to any power y

√ — Square root

∛ — Cube root

ⁿ√x — nth root of x

Common Uses for a Scientific Calculator

Students

Math, physics, chemistry, and engineering courses all require scientific calculators. An online version means you don't need to carry a physical calculator or worry about batteries.

Engineers and Scientists

Quick field calculations, unit conversions, or formula checks during design and analysis work.

Finance Professionals

Compound interest, logarithmic growth curves, and statistical calculations all go beyond what a basic calculator handles.

Medical Professionals

Dosage calculations, body mass index, drug concentration formulas, and other clinical calculations often involve more than simple arithmetic.

DIY and Construction

Calculating angles, areas of unusual shapes, and structural load calculations sometimes require trigonometry.

Scientific Calculator vs. Basic Calculator

| Feature | Basic Calculator | Scientific Calculator | |---|---|---| | Addition/subtraction/multiplication/division | Yes | Yes | | Percentages | Yes | Yes | | Square root | Sometimes | Yes | | Trigonometry (sin, cos, tan) | No | Yes | | Logarithms | No | Yes | | Exponents (xʸ) | No | Yes | | Factorials | No | Yes | | Constants (π, e) | No | Yes | | Memory functions | Sometimes | Yes | | Parentheses for complex expressions | Rarely | Yes |

Tips for Accurate Calculations

Check degree vs. radian mode before doing any trig calculations. Wrong mode = wrong answer.

Use parentheses liberally. When in doubt about order of operations, add parentheses to force the correct order.

Read the display carefully. Scientific calculators show more decimal places than basic calculators. Results like 3.141592653 are precise — don't round them until the very end.

For very large or very small numbers, the calculator uses scientific notation (e.g., 1.5 × 10⁸). This is normal.

Frequently Asked Questions

What's the difference between degrees and radians? Both measure angles, but using different units. A full circle is 360 degrees or 2π radians. Degrees are more intuitive for everyday use. Radians are used in calculus and physics because they simplify many formulas. Our Scientific Calculator lets you switch between both modes.

Can I use the calculator from my keyboard? Yes. You can type numbers and operators directly from your keyboard. Press Enter or = to calculate. This makes it faster than clicking the on-screen buttons.

Is the online scientific calculator as accurate as a physical one? Yes. The calculator uses standard JavaScript floating-point math, which is the same precision used by most scientific calculators and computing tools. For most calculations, you'll never notice a difference.

Does it support order of operations (PEMDAS)? Yes. The Scientific Calculator correctly applies the standard order of operations: Parentheses, Exponents, Multiplication and Division (left to right), Addition and Subtraction (left to right). You can also use parentheses to control the order manually.