- Basic arithmetic: addition, subtraction, multiplication, division
- Percentages: percent of a number, percent change, percent increase/decrease
- Exponents and square roots
- Order of operations (PEMDAS) for multi-step expressions
- Basic scientific functions: sin, cos, tan, log, ln
- Memory functions (M+, M-, MR, MC) for running totals
- Click the number and operator buttons, or type directly using your keyboard
- Press = (or Enter) to see the result
- Use C to clear the current entry, or AC to clear everything
- For percentages, enter the number, press %, then continue the operation
- Use the memory buttons to store a running value across multiple calculations
Step-by-step solution
1
Convert the discount percentage to a decimal: 30% = 0.30
2
Multiply the original price by the decimal: 85 * 0.30 = 25.50
3
This is the amount saved: $25.50
4
Subtract the discount from the original price: 85 - 25.50
5
Final sale price: $59.50
Step-by-step solution
1
Find the difference: 52 - 40 = 12
2
Divide the difference by the original value: 12 / 40 = 0.30
3
Convert to a percentage: 0.30 * 100
4
Final answer: 30% increase
Step-by-step solution
1
Solve inside parentheses first: (2 + 3) = 5
2
Apply the exponent: 5^2 = 25
3
Multiply: 4 * 25 = 100
4
Divide: 100 / 5 = 20
5
Add: 6 + 20
6
Final answer: 26
| Calculation | Formula | Example |
|---|---|---|
| Percent of a number | (percent / 100) * number | 20% of 150 = 30 |
| Percent change | ((new - old) / old) * 100 | ((60-50)/50)*100 = 20% |
| Area of a rectangle | length * width | 5 * 3 = 15 |
| Simple average | sum of values / count of values | (4+8+12)/3 = 8 |
| Square root | √x | √81 = 9 |
Q1Is this online calculator free to use?
Yes, it's completely free with no sign-up or download required, and works directly in your browser on desktop or mobile.
Q2Does it follow the correct order of operations?
Yes, multi-step expressions are evaluated using standard order of operations (parentheses, exponents, multiplication/division, addition/subtraction).
Q3Can I calculate percentages directly?
Yes, use the % button for percent-of, percent-increase, and percent-decrease calculations, or follow the worked examples above for manual formulas.
Q4Does this calculator handle scientific functions?
Basic scientific functions like sine, cosine, tangent, and logarithms are supported. For advanced symbolic math, derivatives, or integrals, use a dedicated scientific or calculus solver.
Q5Is my calculation data saved or stored anywhere?
No, calculations are performed locally in your session and are not saved or transmitted.