🧮 Scientific Calculator

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DEG MODE

How to Use the Scientific Calculator

This free online scientific calculator supports all standard scientific functions including trigonometry (sin, cos, tan), logarithms (log, ln), exponentials, factorials, absolute values, and more. It works in both Degree and Radian mode for trigonometric functions.

Available Functions

Trigonometry
sin, cos, tan and inverses
Logarithms
log (base 10), ln (natural)
Powers
xʸ, 10ˣ, eˣ, √, ∛
Constants
π = 3.14159..., e = 2.71828...

Degree vs Radian Mode

Toggle between DEG and RAD mode using the button. In Degree mode, sin(90) = 1. In Radian mode, sin(π/2) = 1. Most everyday calculations use Degree mode; physics and calculus often use Radian mode.

FAQ – Scientific Calculator

What is the difference between log and ln? ▼
log (log₁₀) is the logarithm base 10, commonly used in science and engineering. ln is the natural logarithm (base e ≈ 2.71828), used in calculus and exponential growth problems.
How do I calculate sin(45°)? ▼
Make sure DEG mode is selected, then press sin, type 45, press ), and press =. The result will be approximately 0.7071.
What is factorial (n!)? ▼
Factorial of n means n × (n−1) × (n−2) × ... × 1. For example, 5! = 5×4×3×2×1 = 120. Use the n! button to calculate factorials.
Can I use keyboard with this calculator? ▼
Yes! Type numbers and operators (+, -, *, /) directly from your keyboard. Press Enter to calculate and Escape to clear.