With inflation in the headlines, you’ve probably seen the acronyms CPI and RPI all over the place. But what’s the difference between the two and why does it matter?

The Office for National Statistics calculates CPI, RPI and CPIH each month. What are they and what do they reveal about UK inflation?

What’s the difference between the CPI and the PPI? These measures of inflation track the prices consumers pay and the prices producers receive for their wares. But they don’t always line up.

But the main difference is in the calculation formulae used. RPI uses a formula known as "Carli" that doesn't account for changes in shopping behaviour if prices rise.

He estimated that in February, 90 points of the 100-basis-point difference between the annual PCE and CPI readings was attributable to the higher weight housing has in the CPI.

The 3.4% is the Consumer Prices Index (CPI) rather than the RPI. The main difference is that the CPI does not include any housing costs, such as the effect of mortgage rates or council tax.

What is the difference between PPI and CPI, for example, and what is PCE? Which one matters most, or should we be looking at all of them? What do the different numbers in each set mean?

The difference between choosing CPI and RPI can have a significant impact on your wallet. Under government policy, regulated rail fares are increased each January in line with RPI from the previous ...

The consumer prices index, or CPI, measures the change in average prices paid by UK consumers for everyday goods and services like groceries and energy.

Inflation: RPI, CPI and RPIJ explained With Britain's National Statistician announcing the creation of a new inflation index, Telegraph Finance explains the different measures of inflation.

What’s the difference between CPI and PCE? The consumer price index and the personal consumption expenditures price index measure the changing cost of different baskets of goods.