Sources & method

US CPI-U, BLS, via Federal Reserve/BLS public files. US government work, public domain. Annual = mean of 12 monthly values. 2026 = Sep 2026 monthly index.
India CPI (2010=100), World Bank WDI FP.CPI.TOTL, originally IMF International Financial Statistics. Licence CC BY 4.0 per World Bank series metadata (License_Type: CC BY-4.0).
INR per USD, Federal Reserve H.10, annual mean of monthly averages.

Value in year B = amount × CPI(B)/CPI(A). Average rate = (CPI(B)/CPI(A))^(1/(B−A)) − 1. Numbers are cross-checked against an independent source in tests/hub_check.py.

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Historical statistics for education only. Not investment advice. US CPI: U.S. Bureau of Labor Statistics CPI-U (public domain), annual averages; 2026 = Sep 2026 index. India CPI: World Bank WDI FP.CPI.TOTL (source IMF IFS), licensed CC BY 4.0. INR/USD: Federal Reserve Board H.10. Sources & method · Embed this calculator · BacktestCard