Skip to content
Calculatordev.com

Expression Calculator

Expression Calculator

Section titled “Expression Calculator”

Evaluate mathematical expressions with variables, functions, units, complex numbers, and matrices using our free expression calculator.

Use Cases

Section titled “Use Cases”

This expression calculator is commonly used by programmers, engineers, students, and scientists for evaluating complex mathematical expressions, testing formulas, and performing advanced calculations with custom variables.

Supported Features

Section titled “Supported Features”
  • Basic Arithmetic: +, -, *, /, ^, %, factorial
  • Functions: sqrt, sin, cos, tan, log, abs, round, and more
  • Variables: Define and use custom variables (x = 10)
  • Constants: pi, e, tau, phi
  • Complex Numbers: 2 + 3i calculations
  • Units: Convert between units (5 cm + 2 inch)
  • Matrices: Vector and matrix operations

Examples

Section titled “Examples”
  • 2 + 3 = 5
  • sqrt(16) = 4
  • sin(pi / 2) = 1
  • x = 10; y = 5; x + y = 15
  • 2 + 3i (complex number)
  • 5 cm + 2 inch = 10.08 cm
  • [1, 2, 3] (vector)

Common Mistakes & Tips

Section titled “Common Mistakes & Tips”

Forgetting Parentheses: Use parentheses for clarity. 2^3+1 gives 9, but 2^(3+1) gives 16. Always group operations explicitly.

Case Sensitivity: Function names and constants are case-sensitive. Use sin, not SIN. Use pi, not PI.

Variable Scope: Variables persist in the current session. Clear the calculator or use new variable names to avoid conflicts.

Unit Mixing: When using units, ensure compatibility. You can’t add meters to seconds, only like units can be combined.

Frequently Asked Questions

Section titled “Frequently Asked Questions”

What mathematical functions are supported?

Section titled “What mathematical functions are supported?”

The calculator supports trigonometric (sin, cos, tan), logarithmic (log, ln), roots (sqrt, cbrt), rounding, absolute values, and many more advanced functions.

Can I use variables?

Section titled “Can I use variables?”

Yes, define variables like x = 10, then use them in expressions. Variables persist during your session.

Does it support complex numbers?

Section titled “Does it support complex numbers?”

Yes, use i for the imaginary unit. Example: (1 + 2i) * (3 - i) = 5 + 5i.

Can I convert units?

Section titled “Can I convert units?”

Yes, the calculator supports unit conversions. Example: 90 km/h to m/s converts speed units automatically.

What’s the difference from other calculators?

Section titled “What’s the difference from other calculators?”

This expression calculator evaluates full mathematical expressions with variables, functions, and units - not just simple arithmetic like basic calculators.

Section titled “Related Calculators”