Scientific Calculator Online – Sin, Cos, Tan, Log & More
A free, advanced scientific calculator for students, engineers and professionals. Solve trigonometry, logarithms, powers and factorials, switch between Degree and Radian, use memory and history, and type with your keyboard. Works instantly in your browser and looks great on mobile.
Scientific Calculator
DEG/RAD • sin cos tan log • Memory • History • 100% Instant
🕘 History
Tip: In DEG mode sin(30)=0.5, in RAD mode sin(π/2)=1
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What Is a Scientific Calculator?
A scientific calculator is a calculator that goes beyond +, -, × and ÷. It can solve trigonometry (sin, cos, tan), logarithms (log, ln), square roots, powers, factorials and use constants like π and e. Our online Scientific Calculator gives you all of this in your browser, with a Degree / Radian switch, memory buttons and a history of your past calculations. No app, no signup and no installation needed.
Key Features
Full Scientific Functions
sin, cos, tan, log, ln, square root, powers, factorial, brackets and the constants π and e.
Degree / Radian Toggle
Switch the angle mode in one click, so your trigonometry answers are always in the right unit.
History Panel
See your previous calculations, check your steps and reuse earlier results.
Memory: M+, M-, MR, MC
Store a value, add to it, subtract from it, recall it or clear it during long calculations.
Real Calculator Feel
Realistic buttons with a click effect, so using it feels like a real calculator.
Keyboard Support
Type numbers and operators, press Enter for the result and Backspace to delete. Fast on desktop.
How to Use the Scientific Calculator
- Choose DEG or RAD mode first, especially if you will use sin, cos or tan.
- Enter your numbers and operators using the buttons or your keyboard.
- Use function buttons like sin, log, √ or n! and close the brackets.
- Press = (or Enter) to see the result.
- Use M+, M-, MR and MC for memory, and check the History for earlier answers.
Supported Functions
| Function | Meaning | Example |
|---|---|---|
sin, cos, tan | Trigonometric functions | sin(30) = 0.5 (Degree mode) |
log | Logarithm base 10 | log(1000) = 3 |
ln | Natural logarithm (base e) | ln(e) = 1 |
√ | Square root | √(81) = 9 |
x², xʸ | Square and power | 2^10 = 1024 |
n! | Factorial | 5! = 120 |
π | Pi, about 3.14159 | 2 × π × 7 |
e | Euler's number, about 2.71828 | e^2 |
Degree vs Radian: Which One to Use?
| Mode | Angle Unit | Example | Use When |
|---|---|---|---|
| DEG | Degrees (full circle = 360°) | sin(30) = 0.5 | School geometry, triangles, most basic trigonometry |
| RAD | Radians (full circle = 2π) | sin(π/6) = 0.5 | Calculus, physics, engineering and programming |
If your trigonometry answer looks wrong, check the mode first. This is the most common mistake.
Memory Buttons Explained
| Button | What It Does |
|---|---|
M+ | Adds the current value to memory |
M- | Subtracts the current value from memory |
MR | Recalls the value stored in memory |
MC | Clears the memory |
Keyboard Shortcuts
| Key | Action |
|---|---|
| 0 – 9 | Enter numbers |
| + - * / | Add, subtract, multiply, divide |
| Enter | Calculate the result |
| Backspace | Delete the last character |
| Esc | Clear everything |
Who Can Use This Tool?
- School and college students solving math, physics and chemistry problems
- Engineering students and engineers working with formulas and trigonometry
- Competitive exam aspirants practicing calculations
- Teachers checking answers and showing examples in class
- Professionals who need a quick scientific calculation without installing an app
Why Use an Online Scientific Calculator?
- Always available on phone, tablet and computer
- History and memory help you avoid repeating steps
- Keyboard support makes typing long expressions easy
- No signup, no app and no installation
- Calculations run in your browser and are not sent to a server
Frequently Asked Questions
What is a scientific calculator?
A scientific calculator does more than basic arithmetic. It also handles trigonometry (sin, cos, tan), logarithms (log, ln), square roots, powers, factorials and constants like π and e. Students, engineers and professionals use it for math, physics and engineering problems.
How do I switch between Degree and Radian mode?
Use the Degree / Radian toggle on the calculator. In Degree mode, sin(30) gives 0.5. In Radian mode, the same input is treated as 30 radians, so the answer is different. Always check the mode before using sin, cos or tan.
Which functions does this calculator support?
It supports addition, subtraction, multiplication, division, sin, cos, tan, log, ln, square root, powers, factorial, brackets and the constants π and e.
How do the Memory buttons M+, M-, MR and MC work?
M+ adds the current value to memory, M- subtracts it, MR recalls the stored value and MC clears the memory. This is useful when you need to reuse a result in a long calculation.
Does the calculator keep a history?
Yes. The History section shows your previous calculations, so you can check your steps and reuse earlier results.
Can I use my keyboard?
Yes. You can type numbers and operators, press Enter to get the result and use Backspace to delete the last character.
Does it work on mobile?
Yes. The layout adjusts to any screen size, so you can use the calculator on phone, tablet and desktop.
Are my calculations sent to a server?
No. All calculations run inside your browser, so your numbers are not uploaded to any server.
Is this scientific calculator free?
Yes, it is 100% free with no signup, no limit and no installation.
Got a tough calculation? Open our Scientific Calculator and solve trigonometry, logs and powers in seconds. It's free!
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