Basic Calculator
Basic Calculator
Related Tools
What is a Basic Calculator?
A basic calculator is a fundamental mathematical tool designed to perform simple arithmetic operations quickly and accurately. Our free online basic calculator provides all the essential functions you need for everyday calculations, including addition, subtraction, multiplication, and division.
Whether you're balancing your checkbook, calculating tips, figuring out discounts, or helping with homework, this calculator makes math simple. The clean, intuitive interface mimics the feel of a physical calculator while offering modern features like calculation history and keyboard support.
Unlike complex scientific calculators, our basic calculator focuses on the operations you use most often. It's perfect for quick calculations without the clutter of advanced functions you might never need.
Calculator Features
Basic Operations
- Addition (+): Add two or more numbers together
- Subtraction (-): Find the difference between numbers
- Multiplication (×): Multiply numbers together
- Division (÷): Divide one number by another
- Percentage (%): Calculate percentages easily
Convenience Features
- Calculation History: Review and reuse previous calculations
- Keyboard Support: Use your keyboard for faster input
- Sign Toggle (±): Switch between positive and negative
- Clear Functions: AC clears all, CE clears entry
- Fullscreen Mode: Expand for easier viewing
How to Use the Basic Calculator
Step 1: Enter Your First Number
Click the number buttons or use your keyboard to enter the first number in your calculation.
Step 2: Select an Operation
Click on the operation you want to perform (+, -, ×, or ÷) or press the corresponding key on your keyboard.
Step 3: Enter Your Second Number
Enter the second number for your calculation.
Step 4: Get Your Result
Press the equals button (=) or hit Enter on your keyboard to see the result. Your calculation is automatically saved to history.
Keyboard Shortcuts
Frequently Asked Questions
Is this calculator free to use?
Yes, our basic calculator is completely free to use. There are no hidden fees, subscriptions, or premium features. All functionality is available to everyone without any cost.
Can I use this calculator on my phone?
Yes, our calculator is fully responsive and works on all devices including smartphones, tablets, and desktop computers. The interface automatically adapts to your screen size for optimal usability.
Is my calculation history saved?
Your calculation history is saved only during your current session and is stored locally in your browser. When you close the page or refresh, the history is cleared. We do not store your calculations on any server.
What happens if I divide by zero?
Division by zero is mathematically undefined. If you attempt to divide by zero, the calculator will display "Error" to indicate an invalid operation. Simply press AC (All Clear) to reset and continue with new calculations.
How accurate are the calculations?
Our calculator uses JavaScript's native number handling, which provides high precision for most practical calculations. For extremely large numbers or calculations requiring more than 15 significant digits, some rounding may occur due to floating-point limitations.
Common Uses for a Basic Calculator
Personal Finance
- Splitting bills with friends
- Calculating tips at restaurants
- Budgeting and expense tracking
- Shopping and discount calculations
Education
- Homework help for basic math
- Checking arithmetic problems
- Learning multiplication tables
- Quick calculations during study
Work & Business
- Quick estimates and quotes
- Inventory calculations
- Basic accounting tasks
- Unit price comparisons
Everyday Tasks
- Cooking and recipe scaling
- Home improvement measurements
- Gas mileage calculations
- Time zone conversions