finance ToolUpdated 2026-09-20

Currency Converter Online

Convert amounts between major international currencies including US Dollars, British Pounds, Euros, Canadian Dollars, Australian Dollars, Japanese Yen, and Indian Rupees.

Formula & Mathematical Methodology

Target Amount = (Source Amount × Rate_to_USD) ÷ Target_Rate_to_USD

Cross-rates are calculated using the US Dollar as standard global reference denominator currency.

Step-by-Step Worked Example

Scenario: Convert £100 GBP to USD.

1. Reference rate: 1 GBP = $1.30 USD.

2. Multiply 100 GBP by 1.30: 100 × 1.30 = $130.00 USD.

3. Inverse exchange rate: 1 USD = £0.7692 GBP.

Final Calculated Result: $130.00 USD

Frequently Asked Questions

Are there hidden transaction fees in currency exchange?

Commercial banks and retail exchange booths typically charge a spread (markup) between 1.5% and 4.0% over the interbank exchange rate shown in standard economic references.