A calculator with scientific functions — sine, cosine, square root, logarithms and powers — that you can use with your mouse or your keyboard. Type an expression like (2+3)×4 and press equals. Everything runs in your browser, so nothing you type is uploaded.
About this scientific calculator
A scientific calculator goes beyond a basic four-function calculator: as well as adding, subtracting, multiplying and dividing, it can work out trigonometry (sin, cos, tan), logarithms (ln and log), square roots, squares and powers, and it knows the constants pi (π) and e. You build up an expression — like (2+3)×4 or sqrt(16) — and press equals to get the answer. The angle functions use degrees, so sin(30) is 0.5. This tool reads your expression with a small safe math parser (it never runs your text as code), and everything happens in your browser, so nothing you type is uploaded.
Frequently asked questions
- What can this scientific calculator do?
- It handles ordinary math (add, subtract, multiply, divide, parentheses) plus scientific functions: sine, cosine, tangent, natural log (ln), log base 10, square root, squaring, powers, percentages, and the constants pi and e.
- Are the trig functions in degrees or radians?
- The sin, cos and tan functions work in degrees, so typing sin(30) gives 0.5 as most people expect.
- Can I use my keyboard?
- Yes. Type digits and operators directly, press Enter or = to calculate, Backspace to delete, and Escape to clear. Everything runs in your browser, so nothing you type is uploaded.
Understanding Scientific Notation and Order of Operations
Scientific calculators rely on the order of operations, commonly known by the acronym PEMDAS or BODMAS, to ensure mathematical consistency. This convention dictates that parentheses are evaluated first, followed by exponents, then multiplication and division, and finally addition and subtraction. Without this strict hierarchy, a simple string of numbers would be ambiguous and lead to inconsistent results depending on the order in which a user inputs the values. By adhering to these standard rules, the calculator processes complex expressions in the same way that mathematicians do globally.
The scientific functions included in this tool are derived from Taylor series expansions and numerical analysis algorithms that approximate transcendental values. For instance, trigonometric functions like sine and cosine are computed using polynomial approximations that converge to the correct value within a very small margin of error. Logarithms are calculated using similar iterative methods to determine the exponent to which a base must be raised to produce a given number. These internal processes allow the calculator to handle irrational constants like pi and e with high precision.
The most common mistake users make involves the misuse of parentheses when defining the scope of an operation. If a user enters a complex expression without grouping, the calculator follows the order of operations strictly, which may ignore the user's intended sequence of calculation. For example, failing to group terms in a denominator or an exponent will result in the calculator applying operations to only the adjacent number rather than the entire expression. Always verify that the grouping symbols correctly enclose the intended portions of your formula to avoid unexpected outcomes.