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São Tomé and Príncipe Dobra (STN) to Old Sierra Leonean Leone (SLL)

Convert São Tomé and Príncipe dobras to old Sierra Leonean leones at the live mid-market rate. Reverse: SLL to STN

The Old Sierra Leonean Leone is no longer in use

Old Sierra Leonean Leone (SLL) was replaced by the Sierra Leonean Leone (SLE) in 2022. For today’s money, convert STN to SLE.

1 São Tomé and Príncipe Dobra =

1,053.81 SLL +0.67% today

1 STN = 1,053.81 SLL · 1 SLL = 0.00094894 STN

Mid-market rate, updated 11:34 UTC. Paid plans update as often as every 60 seconds. Get STN→SLL rates via API

STN to SLL over the last year

1,040.001,060.001,080.001,100.00Nov ’25Jan ’26Mar ’26May ’26Jul ’26Sep ’26
52-week high
1,106.11
52-week low
1,043.44
52-week average
1,072.62
Change over the year
−2.61%

Conversion tables

STN to SLL
STN SLL
1 STN 1,053.81 SLL
10 STN 10,538.09 SLL
100 STN 105,380.88 SLL
1,000 STN 1,053,808.76 SLL
10,000 STN 10,538,087.64 SLL
50,000 STN 52,690,438.21 SLL
100,000 STN 105,380,876.43 SLL
SLL to STN
SLL STN
1 SLL 0.0009489 STN
10 SLL 0.009489 STN
100 SLL 0.09489 STN
1,000 SLL 0.9489 STN
10,000 SLL 9.49 STN
50,000 SLL 47.45 STN
100,000 SLL 94.89 STN

Get STN→SLL rates via API

The live rate, the rate on any past day or a whole range, for SLL and 170+ other currencies, as JSON. Free plan included. See the exchange rate API.

Get a free API key API documentation 
curl https://api.currencyapi.com/v3/latest \
  -G -d base_currency=STN -d currencies=SLL \
  -H "apikey: YOUR-API-KEY"

# the rate on a past day
curl https://api.currencyapi.com/v3/historical \
  -G -d base_currency=STN -d currencies=SLL \
  -d date=2025-10-04 \
  -H "apikey: YOUR-API-KEY"

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Questions about STN to SLL

How much is 1 STN in SLL?

1 São Tomé and Príncipe Dobra is 1,053.81 old Sierra Leonean leones at the mid-market rate of 4 October 2026, 11:34 UTC, and 1 SLL is 0.00094894 STN.

What was the STN to SLL rate over the last year?

Over the last 52 weeks 1 STN ranged from 1,043.44 to 1,106.11 SLL, 1,072.62 SLL on average.

Which exchange rate is this?

The mid-market rate: the midpoint between what currency markets pay and ask for STN/SLL, without the margin a bank or card issuer adds, so the rate you are charged is usually a little worse.