1. Currency converter
  2. STD to SLL

Old São Tomé Dobra (STD) to Old Sierra Leonean Leone (SLL)

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

The Old São Tomé Dobra is no longer in use

Old São Tomé Dobra (STD) was replaced by the São Tomé and Príncipe Dobra (STN) in 2018. For today’s money, convert 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 STD to SLE.

1 Old São Tomé Dobra =

1.05 SLL +0.67% today

1 STD = 1.05381 SLL · 1 SLL = 0.948939 STD

Mid-market rate, updated 03:39 UTC. Paid plans update as often as every 60 seconds. Get STD→SLL rates via API

STD to SLL over the last year

1.041.061.081.10Nov ’25Jan ’26Mar ’26May ’26Jul ’26Sep ’26
52-week high
1.1061
52-week low
1.0434
52-week average
1.0727
Change over the year
−2.61%

Conversion tables

STD to SLL
STD SLL
1 STD 1.05 SLL
10 STD 10.54 SLL
100 STD 105.38 SLL
1,000 STD 1,053.81 SLL
10,000 STD 10,538.09 SLL
50,000 STD 52,690.44 SLL
100,000 STD 105,380.88 SLL
SLL to STD
SLL STD
1 SLL 0.9489 STD
10 SLL 9.49 STD
100 SLL 94.89 STD
1,000 SLL 948.94 STD
10,000 SLL 9,489.39 STD
50,000 SLL 47,446.94 STD
100,000 SLL 94,893.87 STD

Get STD→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=STD -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=STD -d currencies=SLL \
  -d date=2025-10-04 \
  -H "apikey: YOUR-API-KEY"

Related conversions

Popular Old São Tomé Dobra conversions

Popular Old Sierra Leonean Leone conversions

Questions about STD to SLL

How much is 1 STD in SLL?

1 Old São Tomé Dobra is 1.05381 old Sierra Leonean leones at the mid-market rate of 4 October 2026, 03:39 UTC, and 1 SLL is 0.948939 STD.

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

Over the last 52 weeks 1 STD ranged from 1.04344 to 1.10611 SLL, 1.07269 SLL on average.

Which exchange rate is this?

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