Scientific Calculator
Free online scientific calculator with trigonometric, logarithmic, and exponential functions
Check Scientific Calculator
Assumptions and Result Notes
- • Arithmetic expressions use standard precedence: powers, multiply/divide/modulo, then add/subtract.
- • Trig functions use the selected RAD or DEG mode; inverse trig returns angles in that same mode.
- • This real-number calculator blocks undefined domains such as log(x ≤ 0), sqrt(x < 0), and asin values outside [-1, 1].
- • Displayed results are rounded to 12 significant digits to keep chained calculations readable.
Use the calculator for trig, logarithms, powers, roots, factorials, memory recall, and chained expressions. Check DEG/RAD before any angle input; that setting is the most common source of wrong trig results.
How the result is built
Functions, Modes, And Worked Checks
Sine, cosine, tangent, and inverse trig use the selected DEG or RAD mode. A 30 degree sine check should return 0.5 in DEG mode.
Use log, ln, powers, and roots for scale changes, exponential models, scientific notation, and equation checks.
To verify sin(30 degrees), choose DEG, enter 30, then sin. If RAD is active, sin(30) is read as 30 radians and the result will differ.
- Leaving the calculator in radians when the problem gives degrees.
- Taking log or ln of zero or a negative number in real-number mode.
- Rounding an intermediate answer before reusing it with Ans or memory.
Scientific Calculator Functions And Checks
Calculator Task Context
Use this calculator for mixed expressions that combine arithmetic, trigonometry, logarithms, powers, roots, factorials, and constants in one workspace.
Formula And Method Used
The tool evaluates the selected operation with the displayed angle mode, applies standard order of operations, and keeps the expression history available for checking or export.
Worked Example
- To estimate sin(30 degrees) + 2^3, choose degree mode, enter sin(30), add 2^3, and calculate.
- The calculator returns 0.5 + 8 = 8.5, so the expression value is 8.5.
Common Mistakes And Limits
- Check degree versus radian mode before using sine, cosine, tangent, or inverse trig.
- Factorials are intended for non-negative whole numbers and grow too quickly for casual mental checking.
- Very long chained expressions can accumulate display rounding; keep important constants visible.
Related Calculators
When to use this scientific calculator
Use it when a problem needs more than arithmetic: trigonometric ratios, inverse trig, logarithms, exponentials, powers, roots, factorials, or a chain of operations that should keep history visible. The calculator is best for checking numeric work after you have chosen the right model.
Variables, units, and limits
The tool does not know the physical units behind your numbers, so keep units consistent before entering values. Trig output depends on DEG/RAD mode, logarithms require positive inputs, and factorials are intended for nonnegative whole-number counts.
Related tools
Use the Quadratic Formula Calculator for structured polynomial solving, the Fraction Calculator for exact fraction steps, and the Percentage Calculator for percent-specific wording.