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Thai Baht (THB) to Old Sierra Leonean Leone (SLL)

Convert Thai baht to old Sierra Leonean leones at the live mid-market rate. Reverse: SLL to THB

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 THB to SLE.

1 Thai Baht =

684.87 SLL 0.00% today

1 THB = 684.875 SLL · 1 SLL = 0.00146012 THB

Mid-market rate, updated 05:56 UTC. Paid plans update as often as every 60 seconds. Get THB→SLL rates via API

THB to SLL over the last year

680.00700.00720.00740.00Nov ’25Jan ’26Mar ’26May ’26Jul ’26Sep ’26
52-week high
739.07
52-week low
675.18
52-week average
703.89
Change over the year
−2.31%

Conversion tables

THB to SLL
THB SLL
1 THB 684.87 SLL
10 THB 6,848.75 SLL
100 THB 68,487.48 SLL
1,000 THB 684,874.81 SLL
10,000 THB 6,848,748.14 SLL
50,000 THB 34,243,740.69 SLL
100,000 THB 68,487,481.37 SLL
SLL to THB
SLL THB
1 SLL 0.00146 THB
10 SLL 0.0146 THB
100 SLL 0.146 THB
1,000 SLL 1.46 THB
10,000 SLL 14.60 THB
50,000 SLL 73.01 THB
100,000 SLL 146.01 THB

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

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Questions about THB to SLL

How much is 1 THB in SLL?

1 Thai Baht is 684.875 old Sierra Leonean leones at the mid-market rate of 4 October 2026, 05:56 UTC, and 1 SLL is 0.00146012 THB.

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

Over the last 52 weeks 1 THB ranged from 675.176 to 739.073 SLL, 703.894 SLL on average.

Which exchange rate is this?

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