Jak to działa — Darmowy Kalkulator Procentów

Our calculator solves three types of percentage problems instantly. Here's how each one works:

1

Ile wynosi X% z Y?

Wynik = (X / 100) × Y

15% × 200 = 30

2

X to ile % z Y?

Wynik = (X / Y) × 100

45 / 180 × 100 = 25%

3

% Zmiana

Wynik = ((Y - X) / |X|) × 100

(100-80)/80 × 100 = 25%

Tips for Accurate Calculations

✓ Always double-check which value is the 'part' and which is the 'whole'.
✓ For percentage change, the original value is always the denominator.
✓ Negative percentage change indicates a decrease.
✓ You can use decimals in all input fields for precise calculations.