How has your purchasing power changed?

How to use this calculator

1. Select two months from the same official series; the final month cannot be earlier.
2. Enter the amount for the initial month.
3. For income comparisons, add the final amount to distinguish nominal and real change.

An example to check the calculation

Fictional mathematical example, not INE data: if an index rises from 100 to 125, €1,000 becomes equivalent to €1,250. If income only rises to €1,100, the real change is −12%.

The formula, in plain sight

Equivalent amount = initial amount × (final index ÷ initial index)

CPI change = (final index ÷ initial index − 1) × 100. Nominal change = (final income ÷ initial income − 1) × 100.

Real change = ((final income ÷ initial income) ÷ (final index ÷ initial index) − 1) × 100. Simply subtracting the two percentages does not give this result.

What it means and what it does not

The all-items CPI represents a national statistical basket, not your personal spending. This tool does not update rental contracts or predict property prices. Only months with final indices are available.