Percentage Calculator
Calculate percentages, percentage increases, decreases, and differences quickly.
Calculated Result
30
20% of 150 is equal to 30
How to Use the Percentage Calculator
- Select your target mode (percentage of a value, percentage increase/decrease, or what % X is of Y).
- Enter your base numbers into the designated fields.
- The tool computes the result in real-time as you type without reloading.
- Click "Copy Result" to save the answer directly to your clipboard.
Formulas & Mathematical Logic
-
Percentage of a Number:
Result = (Percentage / 100) × Total Amount -
Find Percentage (X of Y):
Percentage = (X / Y) × 100 -
Percentage Increase:
New Value = Original × (1 + Rate / 100) -
Percentage Decrease:
New Value = Original × (1 - Rate / 100)
Practical Everyday Examples
-
Sales Tip: 15% on a $60 restaurant bill =
(15 / 100) × 60 = $9.00. -
Salary Increase: 5% annual raise on $50,000 =
50,000 × 1.05 = $52,500. -
Exam Grade: Scoring 42 out of 50 =
(42 / 50) × 100 = 84%.
Common Use Cases
- Retail shopping discounts and clearance sale comparisons.
- Corporate performance bonuses, commission rates, and salary revisions.
- Academic test score grading and grading curve analyses.
Frequently Asked Questions
How do I calculate a percentage increase?
Subtract the original amount from the new amount, divide by the original amount, and multiply by 100.
Is calculation data stored or sent to a server?
No. Calculations execute locally in your browser. Your numerical inputs remain strictly on your device.