Scientific Calculator — Free Online
A full-featured scientific calculator with trigonometric functions, logarithms, exponents, and calculation history. Supports DEG and RAD modes.
Available Functions
Trigonometry
sin, cos, tan, sin⁻¹, cos⁻¹, tan⁻¹
Logarithms
log (base 10), ln (natural log)
Powers
x², xⁿ (custom power), sqrt
Constants
pi (3.14159...), e (2.71828...)
Basic Math
+, -, x, /, parentheses
Modes
DEG (degrees), RAD (radians)
About This Scientific Calculator
This scientific calculator handles complex mathematical expressions including trigonometric functions, logarithms, and exponential operations. It uses a recursive descent parser to safely evaluate expressions without any use of JavaScript's eval function.
The calculator supports chained expressions with proper operator precedence (PEMDAS/BODMAS). You can type complex expressions like sin(30) + cos(60) x 2 and get accurate results. The calculation history panel keeps track of your last 10 calculations for easy reference.
Toggle between Degree (DEG) and Radian (RAD) modes using the mode button. All trigonometric functions automatically use the selected angle unit. This makes it suitable for both everyday calculations and more advanced mathematics, physics, and engineering problems.
Frequently Asked Questions
How do I calculate sin, cos, or tan on this calculator?
Click the sin, cos, or tan button followed by the angle value and equals. Make sure you have selected the correct angle mode (DEG or RAD) before calculating.
What is the difference between DEG and RAD mode?
DEG mode measures angles in degrees (0-360). RAD mode uses radians (0 to 2pi). Most everyday calculations use degrees. Radians are common in advanced mathematics and physics.
Can I do exponent calculations?
Yes, use the xn button to raise a number to any power. For example, to calculate 2^10, press 2, then xn, then 10, then equals.