Money Converter by Year

This tool converts a monetary amount from one currency to another using a specific year’s exchange rate. It supports ISO 4217 currency codes and validates inputs to ensure sensible results. The conversion is anchored to a selected year, enabling side-by-side historical comparisons and reproducible analyses.\n\nHow it works conceptually: a rate table maps each currency pair to a yearly rate; for a given year, the system queries the dataset and applies the rate to the input amount. If multiple rate sources exist, a primary source is used with an auditable data_source tag. Optional rate_model determines whether the rate is an annual average, year-end, or daily average.\n\nWho benefits: finance teams performing historical budgeting, researchers analyzing currency impact, economists building scenario models, and educators teaching FX history. Unique value includes year-specific reproducibility, explicit data_sources, and clear handling of missing year data. Core features include input validation, support for multiple currencies, selectable rate models, and precise formatted outputs. Typical use cases include converting 100 USD to EUR for 2015, or assessing purchasing power changes between currencies in a chosen year.