Scientific Calculator
Full-featured scientific calculator with trigonometry, logarithms, powers, and memory functions.
About this calculator
A full scientific calculator in your browser. It has the standard operations, brackets, powers and roots, trigonometric functions (sin, cos, tan), natural and base-10 and base-2 logarithms, π and e, and memory keys.
Use it for physics and maths homework, engineering estimates and exam practice. Tap the keys or type with your keyboard.
How to use it
- Tap the keys to enter an expression, using brackets where needed.
- Press = to evaluate.
- Use the function keys such as sin, ln and log before the number, and check the angle mode for trigonometry.
Order of operations
Expressions follow BODMAS: brackets, orders (powers and roots), division and multiplication, then addition and subtraction. Trigonometric functions need to know whether the angle is in degrees or radians. ln is the natural logarithm (base e), log is base 10 and log₂ is base 2.
Worked example
Quick checks
| sin 30° (degree mode) | 0.5 |
| cos 60° (degree mode) | 0.5 |
| log 1000 | 3 |
| ln e | 1 |
| 2^10 | 1,024 |
Tips and common mistakes
- Check the degree or radian mode before using sin, cos or tan.
- Use brackets to control the order: (2 + 3) × 4 = 20.
- Compare against a known value, such as sin 30° = 0.5, to confirm the mode.
- Use the memory keys to carry a result between steps.
- For very large or small answers expect scientific notation.
Frequently asked questions
What is the difference between ln and log?
ln is base e, log is base 10.
How do I compute sin 30 degrees?
Set degree mode and press sin 30. The answer is 0.5.
What is π?
Approximately 3.14159265, the ratio of a circle's circumference to its diameter.
How do I raise to a power?
Use the power key, for example 2 ^ 10 = 1,024.
Can I use my keyboard?
Yes, number keys and operators work.
Is it allowed in exams?
Check your exam rules; this is an online tool.