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Currency Conversion API

USD/GBP Currency Conversion API

The USD/GBP currency pair represents the exchange rate between the United States Dollar and the British Pound Sterling. Often referred to as 'Cable', this pair is one of the oldest and most traded forex pairs. The USD to GBP rate is influenced by Bank of England and Federal Reserve policies, UK economic data, trade balances, and geopolitical developments.

The USD/GBP Currency Conversion API allows you to:

  • Convert USD (United States Dollar) to GBP (British Pound Sterling) at current market rates
  • Convert GBP (British Pound Sterling) to USD (United States Dollar) at current market rates
  • Get accurate conversions for any amount
  • Access real-time exchange rate data
(4.4)

From 5,079 users

2,800+

Applications using this API

API Status

Online - All Systems Operational

API Response Times

Average
P50
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249ms287ms337ms684ms1101ms

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/v1/convertcurrency GET

https://api.api-ninjas.com/v1/convertcurrency

Parameters

  • have  required

    Currency you currently hold. For example, USD or GBP.

  • want  required

    Currency you want to convert to. For example, GBP or USD.

  • amount  required

    Amount of currency to convert.

Headers

  • X-Api-Key  required

    API Key associated with your account.

Response

A JSON object with the following fields or an error if the request is unsuccessful.

  • old_amount

    The original amount provided in the request.

  • old_currency

    The original currency code (e.g. USD).

  • new_currency

    The target currency code (e.g. GBP).

  • new_amount

    The converted amount in the target currency.

  • timestamp

    Unix timestamp (in seconds) indicating the time at which the exchange rate used for the conversion was applied.

Sample Request Live Demo!

have
want
amount

Try this API endpoint with all available parameters in our API playground

https://api.api-ninjas.com/v1/convertcurrency?have=USD&want=GBP&amount=1000

Headers

X-Api-KeyLog in or sign up to get your API Key

Sample Response

JSON
{
    old_amount:1000,
    old_currency:"USD",
    new_currency:"GBP",
    new_amount:740.05,
    timestamp:1777407247
}

Code Examples

1 2 curl -X GET "https://api.api-ninjas.com/v1/convertcurrency?have=USD&want=GBP&amount=1000" \ -H "X-Api-Key: YOUR_API_KEY"

If your programming language is not listed above, you can still make API calls by using any HTTP request library and following the documentation above.

Frequently Asked Questions

  • Yes, but you must have a premium subscription. Commercial use of the Convert Currency API is not permitted on the free tier. See our pricing page to choose a plan that fits your needs.
  • Sign up for a free account to instantly get your API key, then pass it in the X-Api-Key header on every request. The documentation above includes ready-to-run examples in cURL, Python, JavaScript, Node.js, and more.
  • Your API requests will simply be denied once you hit your monthly quota — you will never be charged more than the plan you signed up for. To increase your quota, you can upgrade your plan any time on our pricing page.
  • The API responds with a standard HTTP status code and a JSON error message describing the problem. See our error codes reference for the full list of codes and how to resolve each one, or contact support if you need help.
  • Send a GET request with three required parameters: have (the 3-character code of the currency you currently hold, e.g. GBP), want (the 3-character code you want to convert to, e.g. AUD), and amount (the quantity to convert). To pull the underlying rates directly instead, see the Exchange Rate API.
  • It returns a JSON object with old_amount and old_currency echoing your input, new_amount and new_currency giving the converted result, and a timestamp (Unix seconds) indicating when the exchange rate used for the conversion was applied. See the error codes page for what is returned on a failed request.
  • Premium members get live forex prices while free users receive 15-minute delayed data, and the API converts between fiat currencies only (for crypto, use a dedicated crypto endpoint). The free tier covers a limited set such as CNY, GBP, AUD and KRW, while the full list of supported currencies is unlocked on premium plans.
  • It is ideal for displaying localized prices in e-commerce checkouts, building travel budgeting tools, and normalizing multi-currency invoices or financial reports. For tracking how much a currency pair fluctuates over time, pair it with the Currency Volatility API.