Calculators / Math / Percentage Calculator

What is X% of Y?
of
=
X is what percent of Y?
is what percent of
=
Percentage Change
→
=
Percentage Increase/Decrease
=
Quick Examples

Common calculations

Tip calculation

Discount calculation

Calculation History

No calculation history yet

Type Formula Example
X% of Y (X / 100) × Y 15% of 200 = 30
X is what % of Y (X / Y) × 100 30 is 15% of 200
Change rate ((New - Old) / Old) × 100 From 80 to 100 = +25%
Percentage increase X × (1 + P/100) 100 increased by 20% = 120
Percentage decrease X × (1 - P/100) 100 decreased by 20% = 80

  • Shopping: Calculate discount rates and final prices
  • Tips: Calculate tip amounts at restaurants or for services
  • Taxes: Calculate tax amounts such as VAT
  • Finance: Calculate interest rates, returns, and more
  • Grades: Convert test scores to percentages
  • Statistics: Analyze ratios and changes in data
Related Calculators
Fraction Calculator VAT Calculator Discount Calculator Tip Calculator