LKR to USD Converter

About This Tool

This LKR to USD converter provides quick, precise FX calculations for developers, fintech teams, travelers, and e-commerce platforms that display prices in multiple currencies. It accepts amount, origin and destination currencies, an optional historical date for rate locking, and returns a numeric result suitable for pricing, budgeting, or on-page currency displays.
Conceptually, the tool queries a standard forex data source to obtain the rate for LKR→USD (or the reverse) and applies converted = amount × rate. If a historical date is supplied, the historical rate is used; otherwise, a real-time mid-market rate is used. No fees or spreads are included unless added by the caller.
Inputs are structured as amount (number, decimal), from_currency and to_currency (three-letter ISO codes), and optional date_for_rate (YYYY-MM-DD). Outputs include converted_amount (number, units = to_currency, two-decimal default), rate_used (number, six decimals), and last_updated (ISO timestamp). Validation enforces positive amounts, supported currencies, and availability of rate data.
The conversion uses rate = fetch_rate(from_currency, to_currency, date_for_rate). If date_for_rate is absent, a real-time rate is used. Historical rates are applied when provided. Rounding follows two decimal places by default; higher precision can be requested.
Missing inputs or invalid currency codes trigger validation errors. Negative or zero amounts are rejected. Rate data unavailability, API timeouts, or unsupported currency pairs produce retryable or explicit error states. Historical date outside supported windows results in a clear, non-UI error that guides retry or fallback handling.
ISO 4217 codes are mandatory; timestamps use UTC. Number formatting follows locale-neutral decimals by default. No transaction fees or spreads are assumed unless added by the integrator.
Assumes data feed provides mid-market rates; weekend/holiday rate gaps may apply for historical lookups.

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