Inflation and purchasing power
Compare money values between two price-index levels that you provide.
Your inputs
The editable example is illustrative. Enter your own dimensions, operating data, prices, and fees. Results update as you edit.
Calculations run in your browser. Inputs are not saved or sent to analytics.
Your result
Complete the inputs to see your result.
How it works
- Equivalent ending amount = Amount × Ending index ÷ Starting index; Inverse purchasing power = Amount × Starting index ÷ Ending index
- Worked example: 50 × 120 ÷ 100 = 60; 50 × 100 ÷ 120 ≈ 41.6666667
- Supported input limits: Amount: 0 ≤ x ≤ 1000000000000; Starting index: 1e-12 ≤ x ≤ 1000000000000; Ending index: 1e-12 ≤ x ≤ 1000000000000; Index series name (optional): n ≤ 100; Market (optional): n ≤ 100; Index dates (optional): n ≤ 100
Assumptions and limitations
Amounts use the selected currency without conversion. Rates, prices, fees and index values are assumptions you supply, not current offers or legal tax rates. Financial simulations retain full period precision and stop at 1200 periods; displayed currency uses its minor units. Taxes, fees and market changes are included only where entered.
Sources
- emonster — Inflation and purchasing power calculator Sources reviewed: 2026-10-06
