User-Supplied PPP Factor Worksheet

This worksheet applies a PPP factor that you already have. It does not contain a current factor table or retrieve World Bank data. Record the source economy, target economy, amount unit or currency, ICP vintage, and factor source alongside the number so the result does not lose the factor’s meaning.

Applying the factor

$\text{target amount}=\text{source amount}\times\text{user-supplied factor}$

The source amount may be zero, but the factor must be positive. The unit is carried through unchanged. Multiplication is this worksheet’s arithmetic convention. Before multiplying, verify from the cited factor definition that it is target units per source unit for the displayed economy direction. If the available factor is source per target, use its reciprocal; do not reuse it unchanged.

Example: comparing purchasing power

Suppose the cited factor for economy A → B is 1.25, its recorded vintage is 2021 ICP, and the amount is 100 units:

$100\text{ units}\times1.25=125\text{ units}$

The factor-adjusted target amount is 125 units. The labels and metadata document the user’s factor; they do not certify that it is official, current, or appropriate for a different measure.

Keep the comparison specific

PPP factors depend on the economy pair, comparison measure, and vintage. A likely mistake is to enter a market exchange rate while labeling it as a PPP factor, or to omit the vintage and later treat an old result as current. Another is to mix the unit of the amount with the unit expected by the cited factor.

This worksheet does not imply an embedded current factor, market exchange result, cost-of-living budget, relocation budget, or trading signal. Recheck the cited factor’s definition and vintage before reusing the result.

For a market exchange calculation rather than a PPP comparison, use the currency calculator.

Source boundary

The World Bank International Comparison Program’s methodology and calculation page supports recording the PPP measure, economy direction, and vintage. It does not supply or validate the factor entered here, and it is not attributed as the source of this worksheet’s multiplication convention. Version: ICP methodology page accessed 2026-07-09. Jurisdiction: International.