What modes are available?

X% of Y, X is what % of Y, % change, increase by %, and decrease by %.

Percentage Calculator

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Calculate percentages, percent-of, percent change, and increase/decrease by percent.

Percent (X)

Of value (Y)

15% of 200

15, 200

Length, mass, temp, data, time units

Live currency conversion (ECB rates)

Words, characters, reading time

Calculate exact age from birth date