Scientific Calculator
Free online scientific calculator with trigonometry, logarithms, powers, roots, factorials, an answer key and degree/radian modes.
About the Scientific Calculator
This free scientific calculator works in your browser on any phone or computer. It handles everything from simple sums to trigonometry, logarithms, exponents, square roots and factorials, and you can type with your keyboard or tap the buttons.
How to Use the Scientific Calculator
- Tap the buttons or type an expression such as 2^3 + sqrt(16).
- Use Deg or Rad to choose how angles are measured.
- Press = (or Enter) to get the answer. Ans re-uses the last result.
Formula and How It Works
The calculator follows the standard order of operations (brackets, powers, multiplication and division, then addition and subtraction). log is base 10, ln is the natural logarithm and x! is the factorial.
Frequently Asked Questions
How do I calculate a percentage on a scientific calculator?
Multiply by the percentage and divide by 100, for example 250 × 15 ÷ 100. The % key does the division by 100 for you.
Why is sin(90) not 1?
The calculator is probably in radian mode. Switch to Deg to work with angles in degrees.