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Old Sierra Leonean Leone (SLL) to Arbitrum (ARB)

Convert old Sierra Leonean leones to Arbitrums at the live mid-market rate. Reverse: ARB 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 ARB.

1 Old Sierra Leonean Leone =

0.0002157 ARB +0.09% today

1 SLL = 0.00021573 ARB · 1 ARB = 4,635.48 SLL

Mid-market rate, updated 09:35 UTC. Paid plans update as often as every 60 seconds. Get SLL→ARB rates via API

SLL to ARB over the last year

0.00020.00040.0006Nov ’25Jan ’26Mar ’26May ’26Jul ’26Sep ’26
52-week high
0.00059774
52-week low
0.00009643
52-week average
0.00034934
Change over the year
+112.37%

Conversion tables

SLL to ARB
SLL ARB
1 SLL 0.0002157 ARB
10 SLL 0.002157 ARB
100 SLL 0.02157 ARB
1,000 SLL 0.2157 ARB
10,000 SLL 2.15727300 ARB
50,000 SLL 10.78636500 ARB
100,000 SLL 21.57273000 ARB
ARB to SLL
ARB SLL
1 ARB 4,635.48 SLL
10 ARB 46,354.83 SLL
100 ARB 463,548.29 SLL
1,000 ARB 4,635,482.91 SLL
10,000 ARB 46,354,829.08 SLL
50,000 ARB 231,774,145.41 SLL
100,000 ARB 463,548,290.81 SLL

Get SLL→ARB rates via API

The live rate, the rate on any past day or a whole range, for ARB 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=ARB \
  -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=ARB \
  -d date=2025-10-04 \
  -H "apikey: YOUR-API-KEY"

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Questions about SLL to ARB

How much is 1 SLL in ARB?

1 Old Sierra Leonean Leone is 0.00021573 Arbitrums at the mid-market rate of 4 October 2026, 09:35 UTC, and 1 ARB is 4,635.48 SLL.

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

Over the last 52 weeks 1 SLL ranged from 0.00009643 to 0.00059774 ARB, 0.00034934 ARB on average.

Which exchange rate is this?

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