Are these live rates?

The interface shows representative rates; the live proxy fetches current rates hourly (the API key stays server-side).

Do these include fees?

No — mid-market rates are shown. Banks and cards usually add a margin and fees.

Currency Exchange Calculator

Convert between world currencies with automatic cross-rates and a 30-day trend.

Amount

Converted

১১,৯৫০

1 USD = ১১৯.৫ BDT · illustrative rate (live rates via API)

📐 About This Calculator

Currencies convert through a common base (USD): divide by the source rate to get the base amount, then multiply by the target rate. This gives an automatic cross-rate for any pair.

amount_in_USD = amount ÷ rate[from] result = amount_in_USD × rate[to] cross-rate(from→to) = rate[to] ÷ rate[from]

Variable Definitions:

• rate[x] = Units of currency x per 1 USD

✅ Best used for:

• Travel and remittances
• Online shopping across currencies
• Quick cross-rate checks

⚠️ Limitations:

• Frontend shows illustrative rates; live rates come from the exchange API
• Excludes bank/card conversion fees

📖 How Currency Conversion Works

Cross-rates

Rather than storing every pair, rates are kept against a single base (USD). Any pair is derived on the fly, keeping conversions consistent.

Rate trends

The 30-day trend shows how the pair has moved recently — helpful for timing a transfer.

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