Inflation Calculator
Inflation calculator
Project future price, today's equivalent, or implied annual inflation rate.
Quick scenarios
Projected future price
$117.06
$100.00 projects to about $117.06 in 5 years at 3.2% annual inflation.
Current price
$100.00
Added cost
$17.06
Cumulative inflation
17.0573%
Avg yearly increase
$3.41
Advanced options
- After 1 year: $103.20 (up $3.20, 3.2%).
- After 2.5 years: $108.19 (up $8.19, 8.193%).
- After 5 years: $117.06 (up $17.06, 17.0573%).
- Basis: constant annual inflation compounded yearly, excluding taxes, fees, and product-mix changes.
Assumptions
Use this as a scenario-planning tool, not a CPI feed.
- Annual inflation is treated as constant and compounded once per year.
- CPI series, taxes, fees, wage shifts, and product substitutions are not included.
- Use one currency basis throughout. Values below -100% are blocked.
Flow
- Choose future price, today-equivalent, or implied-rate mode.
- Enter the amount fields plus either annual inflation or the future target you want to compare.
- Review the answer-first result card, summary metrics, milestone insights, and copy-ready report details.
Example
Worked example: $100 at 3.2% for 5 years
- 1 Future value = 100 × (1 + 0.032)⁵
- 2 Growth factor = 1.170264...
- 3 Future value = 117.06 and inflation impact = 17.06%
At 3.2% inflation for 5 years, $100 becomes about $117.06.
How
- Choose future price, today-equivalent, or implied-rate mode.
- Enter the amount fields plus either annual inflation or the future target you want to compare.
- Review the answer-first result card, summary metrics, milestone insights, and copy-ready report details.
Avoid
- Mixing monthly inflation assumptions into annual-rate inputs.
- Using negative years for forward projections.
- Treating model output as exact CPI forecast instead of constant-rate scenario planning.
Ref only. Verify assumptions, fees, taxes.
FAQ
Does this use official CPI data automatically?
No. You enter the annual inflation rate manually, so the tool stays focused on scenario modeling instead of pulling live CPI data.
Can I model deflation?
Yes. Enter a negative inflation rate to model falling price levels, as long as the rate stays above -100%.
Why compare inflation with CAGR?
Both use compounding, so the same route can help with future-price growth, today-dollar equivalence, and annualized rate backsolves.
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