Percentage Calculator Online Free
Percent of a number · tip calculator · discount · % change — free, no signup.
How to Use the Percentage Calculator
Choose a mode
% of a number, reverse %, change, tip, or discount.
Enter values
Results update live. Use tip and discount presets on mobile.
Copy the answer
Copy totals, tip amounts, sale prices, or percentages in one tap.
What this percent calculator can do
What is X% of Y?
Classic percentage of a number — e.g. what is 15% of 200, tax, or commission.
Reverse percentage
Find what percent one number is of another (exam scores, ratios).
Percentage change
Percentage increase or decrease from an old value to a new value.
Tip & discount
Tip calculator with bill split; discount calculator for sale price and savings.
Frequently Asked Questions
Is this percentage calculator free?
Yes. Site95 free percentage calculator, tip calculator, and discount calculator need no signup and have no limits.
How do I find what is 15% of 200?
Open “% of a number”, enter 15 as the percentage and 200 as the number. The result (30) updates as you type.
How do I calculate reverse percentage (X is what % of Y)?
Open “What % is X of Y”, enter the part (X) and the whole (Y). Example: 25 of 200 = 12.5%.
How do I calculate percentage increase or decrease?
Open “% change”, enter the old value (From) and new value (To). You get the percent increase or decrease.
How does the tip calculator work?
Open Tip mode, enter bill amount and tip % (or tap 15%/18%/20% presets). Optionally split between people to see total and per-person amount.
How do I calculate a discount or sale price?
Open Discount mode, enter original price and discount % (or use presets like 20% off). You get sale price and amount saved.
Does my data leave my device?
No. All percent, tip, and discount math runs in your browser only.
Does it work on mobile phones?
Yes. Large tap targets, full-width inputs, and preset chips are optimized for phones.
Free Online Percentage Calculator, Tip Calculator & Discount Calculator
This free percentage calculator online solves everyday percent problems without a spreadsheet. Calculate what is 15% of 200, reverse percentages, track percentage increase or decrease, split a restaurant bill with a tip calculator, or find a sale price with a discount calculator.
Percentage of a number
Enter a percent and a base amount to get the portion. Common for taxes, tips as a flat percent, markups, and “how much is 20% off mentally” checks before checkout.
Reverse percentage & percentage change
See what percent one value is of another (for grades or KPI shares). Use percentage change mode to measure growth from an old price or metric to a new one.
Tip calculator with bill split
Enter the bill and tip percent (10%–25% presets). Split between people to see total with tip and amount per person — a practical tip calculator for dining out.
Discount & sale price calculator
Enter original price and discount percent to get the sale price and how much you save. Useful for shopping deals and clearance math.
All math runs in your browser on Site95 — free, no signup. Also see our loan EMI calculator and unit converter.