Calculators · Tools

Inflation & buying power

CPI-U calibrated insights with once-per-day data refresh plus offline-safe anchors — built for evergreen US search intent.

Data source

CPI series: CPIAUCSL (via FRED) when `FRED_API_KEY` exists, stitched with interpolated anchors (fallback). Display year cap: 2024.

USD onlyEnglish (US)

$100 yesterday → USD today?

Price level math from your reference vintage year straight into 2024 CPI terms.

Nominal USD (historic face value)

Reference year

Available CPI window 1947 — 2024.

Results

1980 → 2024

Today's equivalent USD

$385.6

CPI uplift

Purchasing multiplier

3.86×

Interpretation

Rule of thumb

Nominal cash must scale with CPI to keep everyday spending familiar.