Scientific Calculator
Evaluate expressions with parentheses, powers, square root, trig, logs, and π.
Inputs
Result
Enter values on the left and select Calculate to see the result here.
What the Scientific Calculator does
- Evaluates a typed mathematical expression and returns a numerical result based on the calculator's supported syntax.
- Supports arithmetic operators, parentheses, powers, square root, sine, cosine, tangent, base-10 logarithm, natural logarithm, and pi.
- Works as a general-purpose maths calculator, not a specialist engineering, laboratory, legal, medical, financial, or safety-critical tool.
How to use the Scientific Calculator
- Type an expression such as (2+3)*4, sqrt(81), sin(pi/2), log(100), ln(2), or 2^3.
- Use parentheses to make the intended order of operations clear, especially in longer expressions.
- Click Calculate and independently verify results before using them for professional, safety-critical, financial, medical, engineering, lab, or legal work.
Formula / methodology used
- The expression is tokenized and evaluated with the app's parser rather than JavaScript eval.
- Operator precedence is applied as powers first, then multiplication/division, then addition/subtraction; parentheses override that order.
- Functions supported by the current implementation are sin, cos, tan, sqrt, log for base-10 logarithm, ln for natural logarithm, and pi as a constant.
- Trigonometric functions use radians, results are rounded to 10 decimal places for display, and browser number precision can affect very large, tiny, or sensitive calculations.
Example calculation
Evaluate sqrt(81) + sin(pi/2) + 2^3.
- sqrt(81) = 9
- sin(pi/2) = 1 because trig functions use radians
- 2^3 = 8
- Total = 9 + 1 + 8 = 18
Result: The calculator would return 18, subject to display rounding and supported syntax.
Common mistakes and limitations
- It does not provide specialist engineering units, uncertainty analysis, significant-figure controls, symbolic algebra, matrices, complex numbers, financial functions, medical dosing logic, or legal/regulatory validation.
- Division by zero, invalid square roots/logarithms, malformed input, and non-finite results are rejected as invalid expressions.
- Rounding to 10 decimal places and JavaScript/browser number precision can create small differences from exact or high-precision calculations.
Important note
This scientific calculator is a general-purpose educational maths tool based on your input expression. Do not rely on it as the only check for engineering, laboratory, legal, medical, financial, construction, or other safety-critical decisions.
Scientific Calculator FAQs
Are trig functions in degrees or radians?
They use radians. For example, sin(pi/2) returns about 1. Degree conversion is not a separate mode in the current implementation.
What syntax is supported?
Use +, -, *, /, ^, parentheses, sqrt(), sin(), cos(), tan(), log(), ln(), and pi. Unsupported symbols, unknown functions, mismatched parentheses, or non-finite results return an invalid-expression style message.
Can I use this for professional or safety-critical calculations?
Use caution. It is intended for general maths and education. Rounding, input syntax, operator precedence, and browser floating-point precision can affect results, so specialist work should be checked with appropriate professional tools.