Everyday / Conversion
Percentage Calculator
Calculate percentages, ratios, discounts, markups, and percent changes directly in your browser. Handle discounts, tips, ratios, markups, and percent changes in one place without reaching for a spreadsheet.
What is X% of Y?
Mode
20
Value A
150
Value B
30
Result
Status
Loaded starter percentage example
Primary result
20% of 150 = 30
Amount
30
The percentage amount itself.
Remainder
120
What remains after subtracting that amount.
Double check
60
How 40% of the same base compares.
Breakdown
20% means 0.2 as a decimal.
150 x 0.2 = 30
Useful for quick tax, discount, and commission checks.
Common uses for this result
20% tax on 150
20% tip for a bill of 150
20% commission from 150
Why this gets reused
Percentage math comes up constantly in shopping, budgeting, schoolwork, analytics, and pricing.
Having multiple modes in one place makes the tool more useful than a one-off discount calculator.
Quick examples reduce friction when someone only remembers the kind of question, not the formula.
Strong first-use cases
Checking discounts, tax amounts, and tips while shopping or traveling.
Comparing old and new values for performance, pricing, or budget changes.
Figuring out what portion one number is of a larger total.
Practical notes
Percent-of and what-percent modes cover most everyday ratio questions.
Increase/decrease mode is handy for sale prices, markups, and quick planning math.
Percent change is the one people often search for when comparing before-and-after numbers.