🧮 Math & Algebra

Scientific Calculator

Free online scientific calculator with trig functions, logarithms, powers, roots, and more. Works on any device — no download needed.

🧮 Scientific Calculator

Full scientific calculator with trig, logs, powers, roots, and memory functions.

What Is a Scientific Calculator?

This free online scientific calculator handles all standard and advanced mathematical operations in one place. It goes far beyond a basic calculator. In fact, this scientific calculator supports trigonometric functions, inverse trig, logarithms, natural log, powers, roots, factorials, the constants π and e, and standard arithmetic — everything you need for mathematics, science, and engineering problems.

Whether you are a student, teacher, engineer, or professional, this scientific calculator works on any device with no download or installation required. Furthermore, it follows the correct mathematical order of operations automatically.

What Can This Scientific Calculator Do?

This scientific calculator supports a comprehensive range of mathematical functions.

Basic arithmetic: Addition, subtraction, multiplication, division, and percentage calculations.
Trigonometry: sin, cos, tan, and their inverses (arcsin, arccos, arctan) in both degrees and radians.
Logarithms: log (base 10) and ln (natural logarithm, base e).
Powers and roots: xʸ for any power, √ for square root, ∛ for cube root, and 1/x for reciprocal.
Constants: π (3.14159…) and e (2.71828…) available as single-button inputs.
Factorial: n! for calculating factorials of integers.
Brackets: Full parentheses support for grouping expressions and controlling order of operations.
ANS: Recalls the last result for use in subsequent calculations.

How to Use This Scientific Calculator

Choose DEG or RAD — select degrees for everyday trig calculations, radians for advanced mathematics and calculus.
Enter your expression — click buttons to build your calculation. The expression appears in the display as you build it.
Press = — the scientific calculator evaluates the full expression following correct order of operations.
Use ANS — press ANS to use the previous result in your next calculation without retyping.

💡 For multi-step calculations, use brackets to control the order of operations. For example, sin(30 + 15) is different from sin(30) + 15 — the brackets tell the scientific calculator which part to evaluate first.

Degrees vs Radians in the Scientific Calculator

This scientific calculator supports both angle units. The mode you choose affects all trigonometric functions.

Degrees (DEG): The default mode. Use this for everyday trig calculations, geometry, and most school mathematics. A full circle is 360°.
Radians (RAD): Use this for calculus, advanced mathematics, and physics. A full circle is 2π radians. Most programming languages use radians by default — set this scientific calculator to RAD to match.

A common mistake is leaving the scientific calculator in DEG mode when the problem requires radians — or vice versa. Always check your mode setting before using trig functions.

Is This Scientific Calculator Accurate?

This scientific calculator uses JavaScript’s native Math library, which provides accuracy to approximately 15–17 significant digits — more than sufficient for virtually all practical calculations. According to the Mozilla Developer Network Math reference, JavaScript Math functions implement IEEE 754 double-precision floating-point arithmetic — the same standard used in most scientific and engineering calculators.

Scientific Calculator — Frequently Asked Questions

Does this scientific calculator follow order of operations?

Yes — this scientific calculator correctly follows BODMAS/PEMDAS order of operations. Brackets are evaluated first, then powers, then multiplication and division (left to right), then addition and subtraction. The scientific calculator handles operator precedence automatically so you get mathematically correct results for complex expressions.

What is the ANS button in this scientific calculator?

The ANS button recalls the result of your last calculation. This allows you to use it in the next calculation without retyping. For example, if the scientific calculator shows 47.5, pressing ANS × 2 will calculate 95 — the ANS was substituted automatically. This is especially useful for multi-step calculations.

How do I calculate sin(45°) with this scientific calculator?

Make sure the scientific calculator is in DEG mode. Then click sin, enter 45, and press =. The scientific calculator shows 0.7071 (which is √2/2). If you get a different answer, check that you are in DEG mode and not RAD mode.

Can this scientific calculator handle very large numbers?

Yes — this scientific calculator can handle numbers up to approximately 1.8 × 10^308. Beyond this, results display as Infinity. For very small numbers, it handles down to approximately 5 × 10^-324. Scientific notation (e.g., 1.5e10) is supported in the display automatically for large results.

Is this scientific calculator free?

Yes — this scientific calculator is completely free. There is no download, no registration, and no usage limit. It works on any modern browser on desktop, tablet, or mobile, and no internet connection is needed once the page has loaded.