Does this calculator support degrees and radians?

Yes. Use the DEG/RAD toggle at the top. In DEG mode, sin(90) = 1. In RAD mode, sin(π/2) = 1.

How do I enter expressions with the keyboard?

Type directly into the expression input field. Use standard notation: 2^3 for 2³, sqrt(4) for √4, sin(45) for sin 45°. Press Enter to evaluate.

What functions are supported?

sin, cos, tan, asin, acos, atan, log (base 10), ln (natural log), exp, sqrt, abs, ceil, floor, round, factorial. Constants π (pi) and e are also available.

Can I use implicit multiplication?

Yes. Expressions like 2(3+4) and 2pi are interpreted as 2 × (3+4) and 2 × π respectively.

Scientific Calculator - sin, cos, log, sqrt & More

Scientific calculator functions

This calculator evaluates full mathematical expressions, not just one operation at a time. Type sin(45) + sqrt(16) / 2 and press Enter to get the result instantly.

Supported functions

Trigonometry: sin, cos, tan (inverse: asin, acos, atan)
Logarithms: log (base 10), ln (natural logarithm)
Exponential: exp(x) = eˣ
Roots & powers: sqrt(x), x^y
Rounding: ceil, floor, round, abs
Factorial: factorial(n) for non-negative integers up to 170

Constants

Use pi (or π) for π ≈ 3.14159 and e for Euler's number ≈ 2.71828. Implicit multiplication works: 2pi = 2π.

Expression tips

Use ^ for exponents: 2^8 = 256
Chain functions: sqrt(sin(30)^2 + cos(30)^2) = 1
Implicit multiplication: 2(3+4) = 14
Unary minus: -sin(45) negates the result

Degrees vs radians

Toggle between DEG and RAD to control how angles are interpreted. In DEG mode, sin(90) = 1. In RAD mode, sin(pi/2) = 1.

Order of operations

The expression parser follows standard PEMDAS/BODMAS precedence: Parentheses, Exponents, Multiplication and Division (left to right), Addition and Subtraction (left to right). Important edge cases to know:

Implicit multiplication vs. division: 6 / 2(3) is evaluated as (6 / 2) × 3 = 9, not 6 / (2 × 3) = 1. Use parentheses when the intent is ambiguous.
Unary minus with exponents: -2^2 is evaluated as -(2^2) = -4 because exponentiation binds tighter than unary negation. To get (-2)² = 4, write (-2)^2.

Precision and floating-point

JavaScript (and this calculator) uses 64-bit IEEE 754 double-precision floating-point arithmetic, which provides about 15–17 significant decimal digits of precision. This leads to a well-known quirk: 0.1 + 0.2 evaluates to 0.30000000000000004 rather than exactly 0.3. The calculator rounds results to a sensible number of significant digits for display, so most everyday calculations show clean results - but extremely precise comparisons (e.g., testing whether two results are exactly equal) may reveal floating-point artifacts.