Inflation Calculator

See what money was worth in the past or what it will be worth in the future with UK inflation rates.

Last updated: April 2026 · Source: ONS - Inflation and Price Indices

£

£100.00 in 2000 is equivalent to

£236.32

in 2025 (25 years, 3.5% avg inflation)

Purchasing Power Change

57.7% lost

Cumulative Inflation

136.3%

Price Multiplier

2.36x

Disclaimer

This calculator is provided for informational purposes only and should not be considered as financial or tax advice. All calculations are performed locally in your browser — no personal data is collected or sent to our servers. Rates and thresholds are sourced from HMRC and GOV.UK and are updated for the current tax year. Always verify results with HMRC or consult a qualified professional before making financial decisions.

How It Works

The Consumer Prices Index (CPI) tracks the average price change of a weighted basket of around 700 goods and services purchased by UK households. The Office for National Statistics collects approximately 180,000 price quotes each month from shops, online retailers, and service providers across the country. Each item's weight reflects its share of total household spending, updated annually from the Living Costs and Food Survey.

To convert a historical amount to today's prices, the calculator divides the current CPI index value by the historical index value, then multiplies by the original sum. For example, the CPI index stood at 68.0 in January 2000 and approximately 136.0 in early 2026, giving a ratio of 2.0. This means £100 in January 2000 had roughly the same purchasing power as £200 in 2026.

CPI differs from the older Retail Prices Index (RPI) in several ways: CPI excludes mortgage interest payments and council tax, uses a geometric rather than arithmetic mean for averaging prices, and covers a broader population including foreign visitors' spending. CPIH extends CPI by adding owner-occupiers' housing costs. The calculator defaults to CPI as it is the UK government's preferred inflation measure and the Bank of England's target index.

Adjusting a 2010 salary to 2026 equivalent

  1. Original salary in 2010: £32,000
  2. CPI index January 2010: 112.4, CPI index January 2026: approximately 139.7
  3. Inflation multiplier: 139.7 / 112.4 = 1.243
  4. Equivalent 2026 salary: £32,000 x 1.243 = £39,776
  5. Cumulative inflation over the period: 24.3%, meaning prices rose by nearly a quarter

Source: ONS - Inflation and Price Indices

Frequently Asked Questions

What is the current UK inflation rate?
UK inflation is measured by the Consumer Price Index (CPI) and the Retail Price Index (RPI). Rates change monthly and are published by the Office for National Statistics (ONS). Check the ONS website for the latest figures.
What is the difference between CPI and RPI?
CPI (Consumer Price Index) excludes housing costs like mortgage interest and council tax. RPI (Retail Price Index) includes these costs. CPI is typically lower than RPI and is the government's preferred measure for the inflation target.