Keep Above
What inflation would do
The same arithmetic both ways round: what the thing you're pricing would cost after the years, and what the money you're holding would still buy. The rate is yours to set — this page does not know your country's inflation, and it won't pick a number for you.
A price you're looking at, or money you're holding
Yours to set — no figure is picked for you
Put in a price or an amount you are thinking about, then pick a rate. Nothing here is saved.
| The same thing would cost | — |
|---|---|
| The same money would buy | — |
| Buying power lost | — |
| Buying power would halve around | — |
A flat-rate illustration, not a forecast. Real inflation moves year to year, and the prices of the things you actually buy can move differently from any general figure. The rate here is one you set. Nothing is read from your accounts and nothing is saved. Nothing here is financial advice.
This is one of the tools built into Keep Above
Keep Above is a budgeting app where you enter your bills and income and it works out the balance you need to keep — so you can see what's safe to spend. No bank connection, no ads on your data.
About this calculator
What are the two directions?
The same arithmetic read both ways: multiply by (1+rate)^years and today's price becomes what the thing would cost; divide by it and today's money becomes what it would still buy. Both rows always show, whichever way you frame the question.
What is the halving year?
At a positive rate, the year in which money left alone would buy half of what it buys today — log(2) divided by log(1+rate). It only shows when it lands inside the years you set.
Why doesn't it know my country's inflation?
Because a page that picked a rate for you would be asserting a figure about the future it cannot substantiate. The rate is yours; published national figures are easy to find and change every quarter, and whichever one you use, this page just runs the arithmetic on it.