A standard calculator performs the four basic arithmetic operations — addition, subtraction, multiplication and division — along with percentages, sign toggling and power functions. It is the most widely used calculation tool in the world, from everyday shopping to professional accounting.
How to Use SmartCalc's Standard Calculator
SmartCalc's standard calculator is available instantly on the calculator page. You can operate it entirely by mouse/touch or via keyboard shortcuts:
- Numbers: Click the digit buttons or press 0–9 on your keyboard
- Operators: +, −, ×, ÷ buttons, or keyboard +, -, *, /
- Equals: = button or press Enter
- Clear all: AC button or press Escape
- Clear entry: CE button
- Delete last digit: ⌫ button or Backspace key
- Percentage: % button converts current number to its decimal form
- Power: xʸ button for exponentiation
Order of Operations (BODMAS / PEMDAS)
The standard calculator follows simple left-to-right chained calculation. If you need to follow strict mathematical order of operations (brackets first, then division and multiplication, then addition and subtraction), use the Scientific Calculator or input values in the correct order.
Example: To calculate 5 + 3 × 2 = 11 (not 16), enter: 3 × 2 = (gets 6) then + 5 = (gets 11).
Understanding the Calculation History
SmartCalc stores your last 25 calculations in a scrollable history panel below the keypad. Each entry shows the full expression and result. You can clear history at any time by clicking the "Clear" button. History is stored only in your browser memory — it disappears when you close the tab, ensuring complete privacy.
Percentage Calculations Made Easy
The % button divides the current number by 100. Common uses:
- Find 15% of 200: Type 200 × 15 % = → Result: 30
- Add 18% GST to 1000: Type 1000 + 18 % = → Result: 1180
- Discount 20% off 500: Type 500 − 20 % = → Result: 400
Chained Calculations
You can chain multiple operations without pressing = after each step. For example: 10 + 5 × 2 − 3 = processes left to right, giving 27. The running result updates in the display after each operator press, so you always see where you are in the calculation.
When to Use a Standard vs Scientific Calculator
Use the standard calculator for everyday arithmetic — shopping totals, bill splitting, simple interest, unit counting, and percentage calculations. Switch to the scientific calculator when you need trigonometric functions, logarithms, factorials, or complex mathematical operations.