Online Calculator - Free Basic Calculator is a free online tool for basic arithmetic and scientific calculations in your browser.
It gives visitors a clear calculator first, then explains how the tool works so search engines can understand the purpose of the page.
Enter a number or expression with the keypad, then press equals to calculate the result. You can switch between the standard calculator and scientific calculator when you need functions such as powers, roots, logarithms, and trigonometry.
The memory keys let you store, recall, add to, subtract from, or clear a temporary value while comparing several calculations.
A basic calculator follows standard arithmetic order: multiplication and division are evaluated before addition and subtraction. Scientific mode adds functions such as sine, cosine, tangent, logarithms, powers, factorials, and number-base tools.
Review the expression before pressing equals, especially when using parentheses or scientific functions.
For example, entering 24 + 18 / 3 gives 30 because division is calculated before addition. In scientific mode, sqrt(16) + 2^3 gives 12.
Examples are useful when checking homework, office math, simple estimates, and everyday calculations.
Yes. You can use the calculator directly in your browser without creating an account.
Yes. The scientific tab includes common math functions such as powers, roots, logarithms, trigonometry, and memory controls.
Use it as a quick reference. For financial, engineering, tax, or legal decisions, confirm results with a qualified source.