Use a free online scientific calculator for expressions with trig, logs, roots, powers, factorials, percentages, constants, Ans, memory, history.
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Online scientific calculator
Use the keypad or type a complete expression with powers, roots, logarithms, factorials, percentages, parentheses, constants, and trigonometric functions. The calculator keeps the expression visible so you can check mode, grouping, and the last answer before reusing a result.
Examples
1
Result
DEG
Angle mode
Interpretation
The expression was evaluated with standard order of operations: parentheses, functions and powers, multiplication/division, then addition/subtraction.
Supported input
Arithmetic, parentheses, ^ powers, sqrt, cbrt, abs, sin, cos, tan, inverse trig, log, log2, ln, exp, pow10, inv, factorial, percent, pi, e, ans, mem, and scientific e notation.
Memory and last answer
Memory is 0. Evaluate stores the result as Ans and adds the calculation to history for quick recall.
Scientific Calculator Basics
A scientific calculator extends a basic calculator with roots, logarithms, trigonometric functions, powers, factorials, percentages, constants, and parentheses.
Scientific expressions follow an order of operations, usually treating parentheses first, then powers and roots, then multiplication and division, and finally addition and subtraction. This is why the same numbers can produce different results depending on how the expression is grouped.
Square roots, cube roots, logarithms, inverse trigonometric functions, exponentials, and factorials are common because they appear frequently in geometry, physics, finance, probability, and data analysis. A scientific calculator online free tool is especially useful on mobile because it avoids the friction of switching between several smaller calculators.
The angle mode changes how trigonometric functions are interpreted. In degree mode, sin(30) means sine of 30 degrees. In radian mode, sin(30) means sine of 30 radians, which is a completely different angle. Many wrong online calculator answers come from using the right expression in the wrong angle mode.
Use degrees for most school geometry problems, bearings, and everyday angle measurements unless the problem says otherwise. Use radians for calculus, many physics formulas, and expressions written with pi, such as sin(pi / 2). If a result looks wildly different from an expected textbook answer, check DEG versus RAD before changing the formula.
A full-expression scientific calculator is most useful when it preserves context. Keeping the expression visible makes it easier to spot a missing parenthesis, an unintended percent, or a stale angle mode. The Ans value stores the last evaluated result, while memory can collect a subtotal across several separate calculations.
For multi-step work, evaluate one expression, store or recall it, then use Ans or mem in the next expression. This is safer than copying a rounded display value into the next line because the calculator keeps the underlying numeric result available.
This tool is a numeric scientific calculator, not a symbolic algebra system or graphing calculator. It evaluates the expression you enter and follows standard precedence, but it does not rearrange equations, simplify algebraic expressions, solve systems, or prove identities.
Very large factorials, undefined tangent angles, logarithms of non-positive values, and division by zero are blocked because they do not produce a finite real-number result in this calculator. For exact symbolic simplification, matrix work, graphing, or calculus, use a dedicated calculator for that task.
Frequently asked questions
The calculator supports standard arithmetic (add, subtract, multiply, divide), powers and roots, trigonometric functions (sin, cos, tan and their inverses), logarithms (log₁₀ and ln), exponentials, factorials, and constants such as π and e.
Degrees and radians are both units for measuring angles. A full circle is 360 degrees or 2π radians. Trigonometric functions on scientific calculators can use either unit, so set the mode (DEG or RAD) to match your problem. Errors often occur when the wrong mode is active.
The calculator follows standard BODMAS/PEMDAS order: brackets, orders (powers and roots), division and multiplication, addition and subtraction. Parentheses always override default precedence, so use them when combining multiple operations to ensure the correct result.
Yes. The calculator has degree and radian modes for sin, cos, tan and inverse trigonometric functions. Choose degree mode for most geometry angle measurements and radian mode for calculus-style expressions such as sin(pi / 2).
Yes. You can type expressions such as sqrt(144) + log(100), 5! / (3! * 2!), 2pi, or 6.02e23 / 1e6. The keypad is there for quick entry, but typed input is often faster for long formulas.
Ans recalls the last evaluated answer so it can be used in the next expression. Memory stores a running value that can be increased, decreased, recalled, or cleared with the memory controls.
The most common reason is the wrong angle mode. For example, sin(30) in degrees is 0.5, but sin(30) in radians is not. Check whether the problem expects DEG or RAD before changing the expression.
No. This page is a numeric scientific calculator for expression evaluation. It does not solve equations symbolically or draw graphs; use a graphing calculator, equation solver, matrix calculator, or calculus calculator when the task needs those features.
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