Free Online Calculator

Use this free online calculator for basic and scientific calculations.

The calculator supports everyday arithmetic, percentages, powers, roots, trigonometry, logarithms, factorials, constants, memory, calculation history and keyboard input.

Enter a calculation.
Result 0
Memory: 0
Previous answer 0
Angle unit Degrees
Mode Basic

History

Recent calculations appear here. Click a previous expression to reuse it.

    What is an Online Calculator?

    An online calculator is a browser-based tool that helps you solve mathematical calculations directly from your device. You can use it for simple arithmetic, scientific formulas, percentages, powers, roots and common math operations.

    This calculator includes both a basic calculator mode and a scientific calculator mode, so you can switch between simple everyday calculations and more advanced functions.

    The tool runs directly in your browser and processes calculations locally.

    What can you use it for?

    You can use this calculator for quick math, school work, business calculations, shopping, percentages, finance checks, scientific calculations, trigonometry, logarithms, powers, roots and general problem solving.

    The calculator can handle addition, subtraction, multiplication, division, percentages, parentheses, powers, square roots, factorials, modulo, constants, memory and calculation history.

    How to use the Calculator

    Step 1: Choose the calculator mode

    Select basic mode for simple arithmetic or scientific mode for advanced math functions.

    Step 2: Enter your calculation

    Use the calculator buttons or type directly into the expression field. You can use numbers, operators, parentheses and supported functions.

    Step 3: Choose angle units if needed

    For trigonometry, choose degrees or radians depending on the calculation you need.

    Step 4: Calculate the result

    Click the equals button or press Enter on your keyboard to calculate the result.

    Basic calculator features

    The basic calculator supports:

    • Addition
    • Subtraction
    • Multiplication
    • Division
    • Percentages
    • Parentheses
    • Decimal numbers
    • Positive and negative values
    • Copy result
    • Keyboard input
    • Calculation history
    • Memory functions

    Scientific calculator features

    The scientific calculator supports:

    • Powers
    • Square roots
    • Factorials
    • Modulo
    • Trigonometric functions
    • Inverse trigonometric functions
    • Logarithms
    • Natural logarithms
    • Exponential function
    • Absolute value
    • Constants such as π and e
    • Degrees and radians
    • Previous answer using ANS
    • Random number input

    Supported operators and functions

    This calculator supports many common mathematical operators and functions:

    • + addition
    • - subtraction
    • × multiplication
    • ÷ division
    • % percentage
    • ^ power
    • ! factorial
    • mod modulo
    • sqrt() square root
    • sin() sine
    • cos() cosine
    • tan() tangent
    • asin() inverse sine
    • acos() inverse cosine
    • atan() inverse tangent
    • log() base 10 logarithm
    • ln() natural logarithm
    • abs() absolute value
    • exp() exponential function
    • π pi
    • e Euler’s number
    • ans previous answer

    Calculator memory

    The calculator includes memory buttons:

    • MC clears memory
    • MR recalls memory
    • M+ adds the current result to memory
    • M- subtracts the current result from memory
    • MS stores the current result in memory

    Memory is useful when you need to reuse a number across several calculations.

    Calculator history

    Recent calculations are shown in the history section. You can click a previous calculation to reuse it.

    This helps when you want to compare results, repeat a calculation or avoid retyping a long expression.

    Basic mode vs scientific mode

    Basic mode is best for everyday calculations such as adding prices, subtracting values, multiplying numbers, dividing totals and calculating percentages.

    Scientific mode is useful for more advanced calculations involving trigonometry, roots, powers, logarithms, factorials, constants and mathematical expressions.

    Common use cases

    For everyday math

    Use the calculator for quick addition, subtraction, multiplication, division and percentage calculations.

    For students

    Students can use scientific mode for algebra, trigonometry, logarithms, powers and roots.

    For work and business

    Use it for quick totals, estimates, ratios, price checks and simple business math.

    For shopping

    Calculate discounts, percentages, final prices and comparisons.

    For science and technical work

    Use the scientific functions for formulas, angles, powers, roots and logarithmic calculations.

    Related tools

    Is this Calculator free?

    Yes. This online calculator is completely free to use.

    No. Your calculations are processed directly in your browser. They are not uploaded, saved or stored.

    Yes. You can switch between basic mode and scientific mode.

    Yes. The calculator supports percentage calculations.

    Yes. You can use parentheses to control the order of operations.

    Yes. Scientific mode supports sine, cosine, tangent and inverse trigonometric functions.

    Yes. You can choose between degrees and radians for trigonometric calculations.

    Yes. The calculator includes MC, MR, M+, M- and MS memory buttons.

    Yes. Recent calculations appear in the history section during your session.

    Yes. You can type calculations directly and press Enter to calculate.

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