WFRP Money Converter

The WFRP Money Converter computes conversions between common in-world currencies such as crowns, guilders, thalers, shillings, and groats. The tool accepts a source amount, a source currency, and a target currency, and applies a conversion rate to produce a precise, auditable result. It supports direct currency pairs and indirect conversions via a shared base rate, ensuring consistent values even when a direct rate is not defined. This makes it useful for GMs during treasure distribution, price negotiations, and budgeting in sessions.
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Core logic relies on a currency matrix. Each currency has a rate relative to a base unit; if a direct pair exists, that rate is used. If not, the converter computes rate = rate_to_base[target] / rate_to_base[source]. Outputs include converted_amount, rate_used, and a timestamp. Rounding and locale-aware formatting are available as optional settings. Required inputs are amount, from_currency, and to_currency; optional inputs include a custom rate table and a historical mode to view past values.
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Use cases span rapid loot valuation, vendor quotes, and planning across campaigns. The tool’s domain-focused currencies and explicit rate handling differentiate it from generic calculators. It avoids real-world financial data, focusing on in-game economies. Edge cases include unknown currencies, negative amounts, or missing inputs, which emit structured errors rather than UI messages. Localization notes acknowledge medieval units and potential decimal handling per locale. Assumptions include stable in-session exchange conventions, while exclusions cover multi-region tax rules and non-standard currencies.