Percentage Calculators
Free online percentage calculators for everyday math. Choose from our collection below — all calculators provide instant results as you type.
Percentage of a Number
Find X% of any number
Formula: (X / 100) × Y
Percentage Change Calculator
Find % increase or decrease
Formula: ((New - Old) / |Old|) × 100
What Percent is X of Y?
X is what % of Y?
Formula: (X / Y) × 100
Percentage Increase/Decrease
Add or subtract a percentage
Formula: Value ± (Value × P / 100)
Tip Calculator
Calculate tips & split bills
Formula: Tip = Bill × (Tip% / 100)
Discount Calculator
Find sale price & savings
Formula: Sale Price = Price - (Price × Discount% / 100)
About Percentage Calculators
CalcPro's percentage calculators provide instant, accurate results for all your percentage needs. Whether you're calculating a tip, finding a discount, determining percentage change, or figuring out what percent one number is of another — each calculator features real-time computation, step-by-step explanations showing the formulas used, and shareable URLs so you can save or share your results. All tools are free, mobile-friendly, and require no signup.