Angle check
Input: sin(30)
Result: 0.5 in degree mode
Engineering Calculator
Advanced scientific calculator with trigonometric functions, logarithms, exponents, factorials, and constants. Perfect for students, engineers, and professionals.
Angle UnitDEG (Degrees)
0
0
Keyboard Shortcuts
0-9 Number input
+ - * / Operators
Enter Calculate
Esc Clear
Backspace Delete one character
Function Usage Examples
• Trigonometry: sin(30), cos(45), tan(60)
• Logarithm: log(100), ln(2.718)
• Power: 2**3 = 8, 5**2 = 25
• Factorial: fact(5) = 120
• Square root: sqrt(16) = 4
• Constants: π, e
Formula and decision logic
The engineering calculator extends normal arithmetic with trigonometric, logarithmic, root, factorial, and exponent functions. Use it when a calculation depends on both the function syntax and the selected angle unit, especially for physics, electronics, geometry, and engineering coursework.
Trigonometry: sin(x), cos(x), tan(x) in DEG or RAD mode
Logs and powers: log(x), ln(x), x^y, sqrt(x)
Discrete math: fact(n) for non-negative integers
Worked examples
Radian check
Input: sin(pi / 6)
Result: 0.5 in radian mode
Growth model
Input: 2^5 + log(100)
Result: 34
Natural log
Input: ln(e^3)
Result: 3
Right triangle
Input: sqrt(3^2 + 4^2)
Result: 5
Permutation count
Input: fact(5)
Result: 120
How to use this calculator
- 1Choose DEG or RAD before entering a trigonometric expression
- 2Enter the expression using functions such as sin, cos, tan, log, ln, sqrt, powers, or fact
- 3Use parentheses to make the intended order of operations explicit
- 4Press = to calculate the result and review whether the value is reasonable for the selected function
Function Usage Examples
- Trigonometry: sin(30), cos(45), tan(60)
- Logarithm: log(100), ln(2.718)
- Power: 2**3 = 8, 5**2 = 25
- Factorial: fact(5) = 120
- Square root: sqrt(16) = 4
- Constants: π, e
Usage Examples
- Trigonometry Calculation
- Logarithm Calculation
- Complex Expressions
- Factorial
Calculation History
- items
- Clear All
- No calculation history
Keyboard Shortcuts
- Number input
- Operators
- Calculate
- Clear
- Delete one character
How to read the result
- Always confirm whether the calculator is in degree or radian mode before evaluating trig functions. The same input can produce a different value if the angle unit is wrong.
- Use common identities to sanity-check results, such as sin(30) = 0.5 in degree mode or sqrt(3^2 + 4^2) = 5 for a 3-4-5 triangle.
- Logarithms, roots, and factorials have restricted domains, so a domain error usually means the expression is mathematically invalid rather than a rounding issue.
Common input mistakes
- Leaving the angle unit in radians when you expect degree-based trig results, or switching to degrees when the formula is written in radians.
- Applying factorials to decimals or negative values. Factorial is defined here for non-negative integers.
- Using log(x) and ln(x) interchangeably. log is base 10, while ln is the natural logarithm.
- Taking even roots of negative values without considering complex numbers, which this calculator does not display as a complex result.
Frequently asked questions
What functions does the engineering calculator support?
It supports trigonometric functions (sin, cos, tan), logarithms (log and ln), powers, roots, factorials, and constants. This makes it useful for scientific notation, geometry, physics formulas, engineering coursework, and quick checks where a standard four-function calculator is not enough.
Can I switch between degrees and radians?
Yes. Use degree mode for inputs like sin(30) when the angle is measured in degrees, and radian mode for formulas that use pi, such as sin(pi / 6). Checking the angle unit first is the easiest way to avoid incorrect trigonometry results.
Is this suitable for college-level math?
Yes. It covers the core functions commonly needed in calculus, physics, electronics, statistics, and engineering classes. For symbolic algebra or graphing you may still need a dedicated CAS or graphing tool, but this calculator is suitable for fast numeric evaluation.