Калькулятор процентной разницы

Percentage difference compares two values symmetrically, using their average as the reference. Use it when neither value is clearly the “original” — for example comparing two prices or two measurements.

Пример

100 vs 120: (20 ÷ 110) × 100 ≈ 18.18%

Как рассчитать

  1. Enter the first value.
  2. Enter the second value.
  3. Read the relative difference — the result is the same whichever value you enter first.

Формула

Difference = (|A − B| ÷ ((A + B) ÷ 2)) × 100

Пояснение

  • Comparing two quotes, suppliers or measurements.
  • Science and engineering: comparing two experimental readings.

Часто задаваемые вопросы

Difference vs change — which one do I need?

Use percentage change when one value is the reference (before → after). Use percentage difference when comparing two values with no natural reference.

Why divide by the average?

Dividing by the average makes the result symmetric: swapping the two values gives the same percentage, which is what “difference” should mean.