Unit Rate Converter

Purpose and intended users: The Unit Rate Converter computes price per unit from total cost and quantity, enabling apples-to-apples comparisons in purchasing, budgeting, and supplier evaluation. Target users include shoppers comparing bulk offers, procurement analysts assessing bids, small business owners pricing packages, and students budgeting materials. Use when unit price informs decisions, such as $24 for 6 items or €3.50 per liter. Example scenarios include grocery bulk buys, manufacturing part bundles, and service quantities priced per unit.
Core logic and features: Required inputs include total_cost (float), quantity (float >0), and optional unit_label. Outputs include unit_price (float) and optional currency_code. Advanced features: currency_code support, rounding rules, locale-aware formatting, and batch processing for multiple pairs. Exclusions: tax, shipping, or cross-unit conversions unless provided.
Algorithms and calculations: Unit_price = total_cost / quantity. If currency_code provided, format with currency symbol and apply rounding rules. Batch mode applies the calculation across input sets.
Error handling and edge cases: quantity <= 0 or missing inputs trigger errors; invalid currency_code falls back to generic numeric formatting; very large or small values are handled with standard precision and scientific notation if needed.
Industry localization: Supports international currencies and decimal separators; locale influences formatting; applicable in US, EU, UK, and APAC contexts, with locale-aware options.
Assumptions & exclusions: Numeric inputs required; excludes unit conversions, taxes, discounts, and shipping calculations unless included in total_cost or provided separately.