Scientific Calculator Online
Full-featured free scientific calculator — trig functions, logarithms, exponents, factorials, memory, and constants. Works on any device.
Scientific Calculator — Full Feature Guide
This free online scientific calculator supports all the operations available on a physical scientific calculator. Key functions: trigonometric (sin, cos, tan and their inverses), logarithms (log base 10 and natural log ln), exponents (x², x³, xʸ, 10ˣ), roots (√x, ³√x), factorial (n!), absolute value (|x|), reciprocal (1/x), constants (π, e), memory (MS, MR, M+, MC), and angle mode switching (degrees, radians, gradians).
Degree vs Radian Mode
Trigonometric functions can operate in degrees or radians. Use DEG mode for everyday problems where angles are expressed in degrees (0°-360°). Use RAD mode for calculus, physics, and engineering problems. Key values: in DEG mode, sin(30°)=0.5, cos(60°)=0.5, tan(45°)=1. In RAD mode, sin(π/6)=0.5, sin(π/2)=1. Toggle using the DEG/RAD buttons above.
Inverse Trigonometric Functions
Press INV to switch sin/cos/tan to their inverses: sin⁻¹ (arcsin), cos⁻¹ (arccos), tan⁻¹ (arctan). Also switches log to 10ˣ. These functions find the angle given a ratio — for example sin⁻¹(0.5) = 30° in degree mode.
Log vs Ln — When to Use Each
log is log base 10 (common logarithm). Used in pH chemistry (pH = -log[H⁺]), decibel calculations, and engineering. log(100) = 2, log(1000) = 3. ln is the natural logarithm (base e ≈ 2.71828). Used in calculus, compound interest, population growth, and radioactive decay. ln(e) = 1, ln(e²) = 2.
How to Use Memory Functions
MS (Memory Store): saves the current display value to memory. MR (Memory Recall): pastes the stored value onto the display. M+ (Memory Add): adds the current display value to whatever is already in memory. MC (Memory Clear): erases the memory. Ans: inserts the result of the previous calculation.