BTN to SLL exchange rate API
Ngultrum to Leone · quoted 2026-10-02
239.3513
▼ +10.88% over 5Y
1 BTN = 239.3513 SLL · 1 SLL = 0.004178 BTN · Get this rate via the API
1 BTN buys 239.3513 SLL as of 2026-10-02, so 1 SLL buys 0.004178 BTN. Over the last 5 years, BTN/SLL traded between 222.0851 and 270.2079, averaged 255.3473 and fell 10.88%. The API holds daily BTN/SLL rates from 2024-08-24 — 2 years of history — so any past day, or a whole series, is one request away.
Converting an invoice? Convert an amount on a specific date.
BTN/SLL over 5Y: show the values
| Point | BTN/SLL |
|---|---|
| 2024-08-24 | 268.5712 |
| 2024-10-07 | 269.4398 |
| 2024-11-06 | 270.2079 |
| 2024-12-06 | 268.6255 |
| 2025-01-05 | 265.4850 |
| 2025-02-04 | 263.0216 |
| 2025-03-06 | 262.9123 |
| 2025-04-06 | 266.5483 |
| 2025-05-06 | 269.8561 |
| 2025-06-07 | 255.4366 |
| 2025-07-07 | 266.0400 |
| 2025-08-06 | 262.9907 |
| 2025-09-05 | 258.4220 |
| 2025-10-06 | 255.9339 |
| 2025-11-05 | 255.5582 |
| 2025-12-05 | 255.7289 |
| 2026-01-05 | 253.4231 |
| 2026-02-04 | 253.4569 |
| 2026-03-06 | 250.4123 |
| 2026-04-05 | 246.6661 |
| 2026-05-09 | 222.0851 |
| 2026-06-12 | 239.8283 |
| 2026-07-12 | 239.6675 |
| 2026-08-11 | 239.7036 |
| 2026-09-11 | 239.6566 |
High
270.2079
Low
222.0851
Average
255.3473
Get this rate via the API
One GET request returns the BTN/SLL rate as JSON. The free plan includes 1,000 requests a month, with no credit card required.
curl -X GET "https://api.fxfeed.io/v2/latest?api_key=YOUR_API_KEY&base=BTN¤cies=SLL"const response = await fetch("https://api.fxfeed.io/v2/latest?api_key=YOUR_API_KEY&base=BTN¤cies=SLL");
const data = await response.json();import requests
data = requests.get("https://api.fxfeed.io/v2/latest?api_key=YOUR_API_KEY&base=BTN¤cies=SLL").json()Replace YOUR_API_KEY with the key from your dashboard.
BTN/SLL API questions
How do I get the BTN/SLL exchange rate from an API?
Send one GET request to https://api.fxfeed.io/v2/latest?api_key=YOUR_API_KEY&base=BTN¤cies=SLL, replacing YOUR_API_KEY with your own key. The JSON response carries the date and the latest BTN/SLL rate in rates.SLL.
How far back does BTN/SLL historical data go?
Daily BTN/SLL rates are available from 2024-08-24. Request one day with the /historical endpoint and a date, or a range of days with /timeseries.
Is there a free BTN/SLL exchange rate API?
Yes. The free plan includes 1,000 requests a month, with no credit card required; paid plans raise the limit.
Put these rates in your application
One endpoint, JSON responses, 160+ currencies and history back to 1999. Start on the free plan.