Convert 1 Old Sierra Leonean Leone (SLL) to São Tomé and Príncipe Dobra (STN)

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

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 SLE to STN.

Amount

From

1 Old Sierra Leonean Leone =

0.0009489 STN −0.67% today

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

Mid-market rate, updated 10:28 UTC. Paid plans update as often as every 60 seconds. Get SLL→STN rates via API

SLL to STN over the last year

52-week high: 0.00095837
52-week low: 0.00090407
52-week average: 0.00093243
Change over the year: +2.68%

Conversion tables

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

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	1,053,808.81 SLL
10,000 STN	10,538,088.06 SLL
50,000 STN	52,690,440.32 SLL
100,000 STN	105,380,880.64 SLL

Get SLL→STN rates via API

The live rate, the rate on any past day or a whole range, for STN 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=SLL -d currencies=STN \
  -H "apikey: YOUR-API-KEY"

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

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Questions about SLL to STN

How much is 1 SLL in STN?

1 Old Sierra Leonean Leone is 0.0009489 São Tomé and Príncipe dobras at the mid-market rate of 4 October 2026, 10:28 UTC, when 1 SLL = 0.00094894 STN.

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

Over the last 52 weeks 1 SLL ranged from 0.00090407 to 0.00095837 STN, 0.00093243 STN on average.

Which exchange rate is this?

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