Inflation and Purchasing Power Calculator

Calculate how inflation erodes money's value over time (forward, backward or cumulative).

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⚠️ Reference rates: results are estimates. Consult a financial advisor for important decisions.

The inflation calculator shows how much an amount will be worth in the future (forward mode), how much a past amount equals in today's money (backward mode) or the cumulative percentage change (cumulative mode). Includes presets with recent average rates for Spain (INE), Eurozone (ECB), USA (BLS) and UK (ONS), and a year-by-year breakdown with annual and cumulative changes. Also shows a visual comparison with the Big Mac index to understand real purchasing power. Use it as many times as you need: it is completely free, requires no sign-up and works directly in your browser.

Frequently asked questions

¿Qué es el modo 'hacia adelante'?
Calcula cuánto costará en el futuro algo que hoy vale X, aplicando la inflación año a año. Ej: 1.000€ hoy con 3% anual en 5 años = 1.159,27€.
¿Qué es el modo 'hacia atrás'?
Calcula cuánto valía en el pasado una cantidad de hoy. Ej: 1.000€ hoy equivalían a 862,61€ hace 5 años con 3% anual.
¿De dónde salen las tasas predefinidas?
Son tasas medias anuales recientes aproximadas: España (INE), Eurozona (BCE), EE.UU. (BLS), Reino Unido (ONS). Para cálculos oficiales usa las series históricas de cada instituto.
What is 'forward' mode?
Calculates how much something worth X today will cost in the future, applying inflation year by year. E.g.: €1,000 today with 3% annually in 5 years = €1,159.27.
What is 'backward' mode?
Calculates how much a current amount was worth in the past. E.g.: €1,000 today equaled €862.61 five years ago with 3% annually.
Where do the preset rates come from?
They are approximate recent annual average rates: Spain (INE), Eurozone (ECB), USA (BLS), UK (ONS). For official calculations use each institute's historical series.

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