Scientific Calculator
A full scientific calculator for advanced math — trigonometry, logarithms, powers, roots, pi and e, evaluating entire expressions right in your browser. Free, fast and private, with no install required.
What is a scientific calculator?
A scientific calculator is a calculator that goes beyond basic arithmetic to handle advanced mathematics — trigonometry (sin, cos, tan), logarithms, powers, roots and constants such as π and e. Students, engineers, scientists and analysts reach for one when a simple add-and-multiply machine is not enough.
This free online scientific calculator evaluates whole expressions with the correct order of operations, so you can tap out a complete problem and press equals for the answer. Pressing sin, cos, tan, log, ln or sqrt inserts the function with an opening bracket, and you simply type the value inside. It runs entirely on JavaScript in your browser, needs no install or account, and keeps every calculation private — ideal for checking homework, lab work or quick engineering estimates on any device.
How to use
- Tap the buttons to build your expression.
- Use sin, cos, tan, log, ln and sqrt, which add an opening bracket for the argument.
- Tap = to evaluate. Use C to clear and ⌫ to delete.
Example
Press 2, xʸ, 1, 0, then = to get 1024 — 2 to the power 10. To take a square root, tap √, type 9, press ) then = to get 3. For a base-10 logarithm, tap log, type 100, close with ) and press = to get 2. Remember that the trigonometric functions use radians, so the value of sin(30) here is about −0.99, not the 0.5 you’d see in degree mode.
Who is this scientific calculator for?
A scientific calculator handles trigonometry, logarithms, exponents and roots that a basic calculator cannot. Students and teachers rely on it the most.
- Students: check trig, logs and powers while working through maths, physics and chemistry homework.
- Teachers: prepare worksheets and demonstrate sine, cosine, log and exponent functions in class.
- College learners: run quick engineering and science calculations for angles, ratios and growth rates.
Scientific functions table
These are the standard angle values the calculator gives for sine, cosine and tangent:
| Angle | sin | cos | tan |
|---|---|---|---|
| 0° | 0.00 | 1.00 | 0.00 |
| 30° | 0.50 | 0.87 | 0.58 |
| 45° | 0.71 | 0.71 | 1.00 |
| 60° | 0.87 | 0.50 | 1.73 |
| 90° | 1.00 | 0.00 | — |
Common use cases
- Homework and study: check trigonometry, logs and powers while working through maths, physics or chemistry.
- Engineering and science: run quick calculations for angles, exponents and roots at the desk.
- Finance and data: use powers and logarithms for compound growth, ratios and analysis.
- Everyday advanced math: handle powers, roots and percentages beyond a basic calculator.
Pro tips
- Trig uses radians: sin, cos and tan take angles in radians, so sin(30) is about −0.99, not 0.5.
- Close your brackets: after tapping log or √, type the value then press ) before equals.
- Use the π and e keys: they insert the constants directly instead of a long decimal.
- Fix mistakes fast: C clears everything, while ⌫ deletes just the last character.
FAQ
What is a scientific calculator?
A calculator that handles advanced maths such as trigonometry, logarithms, powers, roots and constants, in addition to basic arithmetic.
What functions does it support?
It supports sin, cos, tan, log (base 10), ln (natural log), square root, powers, parentheses, pi, e and all the basic arithmetic operators.
How do I evaluate an expression?
Build it with the buttons, then press the equals key — the result appears instantly.
How are functions applied?
Tapping sin, cos, tan, log, ln or sqrt appends the function and an opening bracket, so you add the argument inside.
Does it use degrees or radians?
Trigonometric functions use radians. sin(30) returns about −0.99, not the 0.5 you get in degree mode.
How do I calculate a power?
Use the xʸ key (or ^), then the exponent. For example, 2 xʸ 1 0 gives 1024.
How do I use π and e?
Just tap the π or e keys, which insert the constants directly into your expression.
Why do I get an Error?
Unclosed brackets or a malformed expression shows Error — check that every opening bracket is closed.
Is it private?
Yes — it runs entirely in your browser, and no data is uploaded.
Do I need to install anything?
No. It works in any modern browser, on desktop and mobile.
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