Percentage Calculator
Percentage of a number, discounts, marks, and percent change — the arithmetic students and shopkeepers actually need.
Estimates only — not professional financial, medical, legal or engineering advice. Read full disclaimer.
Result
Fill in the form and click Calculate to see your result here.
How it's calculated
Part = percent/100 × whole. Percent = part/whole × 100. Change % = (new−old)/old × 100.
Example
Example: Percentage Calculator
Inputs
- Mode: percent_of
- Value X: 20
- Value Y: 200
Outputs
- Value: 40
This example uses typical sample values. Adjust the inputs above to see how the results change for your own numbers.
About this calculator
This is not a statistics package. It answers “what is 12% of NPR 2,500?”, “what percent is 36 of 40 marks?”, and “what is the percent change from last month’s bill.”
Percent-of vs percent-change are different (a 10% fall then 10% rise does not return you to start). For GST/VAT amounts use the VAT tool so tax-inclusive logic stays explicit.