Inflation Calculator
Auto-savedLoading United States…
Parameters
Country
Fetching United States CPI data…
Amount ($)
$
From Year
To Year
Quick "From" Year
$1,000.00 in 1990 equals
$2,403.98
in 2024
Total Inflation
+140.4%
over 34 years
Avg Annual Rate
2.61%
per year (CAGR)
Purchasing Power
41.6%
of 1990 $1 remains
Value Increase
$1,403.98
more needed today
Multiplier
2.40×
times original value
Value of $1,000.00 (1990 $) — year by year
1990
1995
2000
2005
2010
2015
2020
2024
$1,000.00 (1990)$2,403.98 (2024)
Purchasing Power Erosion
Remaining: 41.6%Lost to inflation: 58.4%
Source: BLS (1913+) · World Bank · Data 1913–2024
🔖
Bookmark this page
Press Ctrl+D (Windows) or ⌘D (Mac) to save this tool in your browser for instant access anytime — no sign-up needed.

Inflation Calculator — US & UK Historical Data

Share

What Is Inflation and Why Does It Matter?

Inflation is the gradual increase in the price of goods and services over time — and the corresponding decrease in what your money can buy. A pound or dollar today buys less than the same pound or dollar ten, twenty, or fifty years ago. Understanding the real value of money across time is essential for financial planning, investment decisions, wage negotiations, and making sense of historical prices.

This inflation calculator covers 38 countries using official government data and the World Bank CPI API. US CPI is sourced from the Bureau of Labor Statistics (back to 1913) and UK RPI from the Office for National Statistics (back to 1948). For all other countries, data is fetched live from the World Bank and cached for 7 days — so the calculator updates automatically whenever new annual figures are published, with no code changes needed. The "To Year" slider always advances to the latest year the data actually contains.

One important caveat: CPI data is published with a 1–2 year lag. If it is currently 2026, the most recent available year may be 2024 or 2025 depending on the country and how recently the World Bank ingested the national statistics office's release. The maximum year shown always reflects real published data, never a projected or estimated figure.

All calculations run entirely in your browser. No data is uploaded to any server.

US CPI, UK RPI, and World Bank Data: Which Should You Use?

The US Consumer Price Index (CPI) is published by the Bureau of Labor Statistics and has been measured since 1913. It tracks the average change in prices paid by urban consumers for a broad basket of goods and services — food, housing, clothing, transport, medical care, and recreation. This calculator uses BLS annual averages from 1913 to the latest available year, extended with World Bank data as new figures are released.

The UK Retail Price Index (RPI) is published by the Office for National Statistics and covers 1948 onwards. Unlike the CPI, the RPI includes housing costs such as mortgage interest payments and council tax, making it historically the preferred measure for wage negotiations, index-linked gilts, and rail fare increases. ONS annual averages are extended with World Bank data for years beyond the built-in seed.

For all other countries — including India, Germany, Japan, Brazil, and 34 more — the calculator uses the World Bank's FP.CPI.TOTL indicator, which uses 2010 as the base year (index = 100). This is the internationally standardised CPI series and is the same data used by the IMF and international economists for cross-country comparisons. A key difference: RPI typically reads slightly higher than CPI because of its broader basket and arithmetic (vs geometric) averaging. For salary and rent comparisons in the UK, RPI is most relevant. For investment and cross-country comparisons, the World Bank CPI series is the standard choice.

If you want to understand how inflation affects your loan or investment returns, pair this tool with the Compound Interest Calculator or the Loan Payoff Calculator to see real vs nominal figures side by side.

Calculator Features

DATABASE
Live World Bank Data — 38 Countries
US CPI (BLS, 1913+) and UK RPI (ONS, 1948+) are built in as seeds. All 38 countries fetch data live from the World Bank API with a 7-day cache — the max year updates automatically as new data is published.
Year-by-Year Bar Chart
Visual bar chart showing how the equivalent value evolves year by year across the entire date range — spot inflation spikes like the 1970s oil crisis or 2022 cost-of-living surge at a glance.
Purchasing Power Erosion
See what percentage of your original purchasing power remains and how much has been lost. Pairs well with the Compound Interest Calculator to find the real return on savings after inflation.
Auto-Advancing To Year
The "To Year" slider always snaps to the latest year available in the loaded data — no manual update needed year over year. CPI data typically lags 1–2 years behind the current calendar year.
38-Country Coverage
Switch between Americas, Europe, Asia Pacific, Middle East, Africa, and South Asia. Each country's currency symbol and year range update automatically. Searchable dropdown with instant filter.
Quick Year Presets
One-click preset buttons for common "from" years (1950, 1960, 1970, 1980, 1990, 2000, 2010, 2020) for fast historical lookups.

How to Use the Inflation Calculator

  1. 1
    Choose your countrySelect any of 38 countries from the dropdown. US and UK use official BLS CPI and ONS RPI data; all other countries use World Bank CPI data fetched live. The currency symbol and available year range update automatically.
  2. 2
    Enter the amountType the amount of money you want to adjust for inflation — for example, £1,000 or $500. The calculator works for any amount.
  3. 3
    Set the "From Year"Drag the slider or type a year to set the starting year. Use the quick preset buttons (1950–2020) for common historical lookups. For US data this can go back to 1913.
  4. 4
    Set the "To Year"The "To Year" automatically defaults to the latest year in the loaded data. You can drag the slider back to any earlier year to compare two historical periods. Note: CPI data is published with a 1–2 year lag, so the maximum year reflects actual published data, not the current calendar year.
  5. 5
    Read the resultsThe hero panel shows the inflation-adjusted equivalent value. Below it: total inflation percentage, average annual rate, purchasing power remaining, value multiplier, and a year-by-year chart.

Who Uses an Inflation Calculator?

Personal Finance
Compare salaries across decades
Was a £20,000 salary in 1990 better or worse than £40,000 today? Adjust for inflation to compare real purchasing power rather than nominal figures. Use alongside the Paycheck Calculator to factor in taxes too.
Investment
Measure real investment returns
A stock that returned 200% sounds impressive — but if inflation was 150% over the same period, the real return is much smaller. Combine with the Compound Interest Calculator to see nominal vs real growth side by side.
History
Understand historical prices
Curious what a Victorian-era price means in today's money? Or what the 1970s oil crisis cost in real terms? US data goes back to 1913, UK to 1948, and 36 other countries to the 1960s–1980s via World Bank.
Business
Adjust contracts, loans, and pensions
Landlords, pension trustees, and contract writers use RPI and CPI to index-link payments. Calculate the correct inflation-adjusted figure for any contract clause. Pair with the Loan Payoff Calculator to see the real cost of borrowing after inflation.
Research
Academic and journalism research
Economists, journalists, and students use inflation-adjusted figures to make meaningful comparisons across time periods. Cite BLS, ONS, or World Bank data with confidence. 38 countries covered, auto-updating as new data is published.
Policy
Government and public sector
Civil servants, local councils, and policy analysts use CPI and RPI to track real wage growth, set benefits, and evaluate spending plans in real terms. Use the SIP Calculator or EMI Calculator for India-specific inflation and investment planning.

Frequently Asked Questions

Using UK RPI data, £1,000 in 1990 is worth approximately £3,020 in 2024. This means that goods and services costing £1,000 in 1990 would cost around £3,020 today — a total inflation of around 202% over 34 years, averaging about 3.5% per year.

CPI (Consumer Price Index) and RPI (Retail Price Index) both measure inflation, but use different methodologies. The US CPI is published by the Bureau of Labor Statistics and covers a broad basket of consumer goods. The UK RPI is published by the Office for National Statistics and includes housing costs like mortgage interest payments, which CPI excludes. RPI typically reads slightly higher than CPI for the same period. This calculator uses US CPI for American inflation calculations and UK RPI for British calculations.

To calculate inflation-adjusted value, divide the CPI (or RPI) of the target year by the CPI of the starting year, then multiply by the original amount. For example: if CPI was 130.7 in 1990 and 314.2 in 2024, then $1,000 in 1990 equals $1,000 × (314.2 / 130.7) = $2,404 in 2024. The average annual inflation rate is calculated using the compound annual growth rate (CAGR) formula: (endCPI / startCPI) ^ (1 / years) - 1.

Purchasing power refers to the quantity of goods or services that a unit of currency can buy. Inflation erodes purchasing power over time — if inflation averages 3% per year, the purchasing power of £1 falls by about half every 23 years (Rule of 70). This calculator shows the percentage of the original purchasing power that remains in the target year.

US CPI data covers 1913 to the latest available year from the Bureau of Labor Statistics — over 110 years of inflation history. UK RPI covers 1948 onwards from the ONS. For all other countries, the calculator fetches CPI data live from the World Bank API and caches it for 7 days, so it updates automatically as new figures are released. The "To Year" slider always advances to the latest year available in the data. Note that CPI data is typically published with a 1–2 year lag — for example, 2024 figures may not appear until late 2025. The max year shown reflects the most recent data actually published, not the current calendar year.

The 1970s saw some of the highest inflation in both US and UK history. In the US, inflation peaked at 13.5% in 1979 and 13.3% in 1980, driven by the 1973 OPEC oil embargo, expansionary monetary policy, and the abandonment of the Bretton Woods gold standard in 1971. The UK experienced even higher inflation — peaking above 24% in 1975 — due to similar oil shocks compounded by labour disputes and wage-price spirals.

Both the US and UK experienced the highest inflation in 40 years in 2022–2023. US CPI rose from 258.8 in 2020 to 304.7 in 2023 — an increase of 17.7% in three years, with the annual rate peaking at over 9% in mid-2022. UK RPI rose from 291.9 in 2020 to 370.0 in 2023 — a 26.8% increase — with annual RPI peaking above 14% in late 2022. The causes included post-pandemic supply chain disruptions, the Russia–Ukraine war driving energy and food prices, and strong consumer demand.

This calculator uses official annual average CPI and RPI index values from the US Bureau of Labor Statistics and UK Office for National Statistics, extended with live World Bank CPI data for 38 countries. Annual averages are the standard approach for historical comparisons and are accurate for year-to-year calculations. For month-to-month precision, the actual CPI/RPI index values for specific months may differ slightly from annual averages. The World Bank data is fetched live and cached for 7 days, so the maximum year updates automatically as new data is published — no code changes needed. All calculations run entirely in your browser — no data is uploaded or processed externally.