How is inflation calculated?

Adjusted value = original × (CPI_target / CPI_origin). The CPI series captures the average price change of a representative basket of goods and services.

What's the difference between CPI and HICP?

CPI is the headline inflation measure used in the UK and US. HICP (Harmonised Index of Consumer Prices) is the EU-wide methodology used by the ECB. They differ slightly in housing-cost treatment but track each other closely.

Are these the official figures?

The calculator uses annual averages from ONS (UK), BLS (US) and Eurostat (EU). They are updated periodically and may lag the latest monthly print by a few weeks.

📈 Inflationslommeregner

Sammenlign købekraften af penge på tværs af forskellige år ved hjælp af officielle CPI-serier.

Økonomi / indeks

Beløb

From year

To year

ℹ️ Kilde. UK-tal fra ONS CPI årsgennemsnit, USA fra BLS CPI-U, EU fra Eurostat HICP. Lommeregneren bruger årsgennemsnit — faktiske månedlige aflæsninger varierer.

About the Inflation Lommeregner

Inflation Calculator besvarer det klassiske spørgsmål: what is £100 in 1990 worth today? Det bruger officielle CPI årsgennemsnit fra ONS, BLS og Eurostat til at give en sammenligning af købekraft på tværs af år.

The formula

Justeret = Original × (CPI_to / CPI_from)

Cumulative inflation = (CPI_to / CPI_from) − 1. Årligised rate = (ratio)^1/years − 1.

Ofte stillede spørgsmål

Why does inflation vary by economy? Each economy has its own basket of goods, exchange-rate exposure and energy mix. Valuta-strong, low-import economies (Japan, Switzerland) typically have lower historical inflation than emerging-market economies.

Is CPI the same as the cost of living? Omtrent, ja — CPI er den mest brugte proxy. RPI (UK) og kædet CPI (US) er alternative mål med lidt forskellige metoder.

How often are figures updated? CPI is published monthly. The annual averages used here are typically finalised in January for the prior year.

⚠️

Vigtig bemærkning: Indices are macro averages. Personal inflation (depending on housing, transport and lifestyle mix) can be materially higher or lower.

Relaterede lommeregnere

Compound Interest — See how savings grow with daily/monthly compounding.
Retirement Goal Tracker — Er du på rette spor? Forventet formue vs. nødvendig formue for din målindkomst.
Pension Pot Calculator — UK pension eller US 401k pensionspotfremskrivning med arbejdsgivermatch og skattelempelse.