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Percentage Calculator
Calculate percentages, discounts, percent change, margin, and markup locally.
All calculations run locally in this browser. No values are uploaded or stored.
Result
Find a percentage of a value.
Result
30
20% of 150
Decimal form
0.2
Percentage converted to a multiplier.
Common percentage formulas
Percent of value(percent / 100) x value
X is what percent of Y(part / whole) x 100
Percent change((new - old) / |old|) x 100
Margin((price - cost) / price) x 100
Markup((price - cost) / cost) x 100