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Czech Koruna (CZK) to Old Sierra Leonean Leone (SLL)

Convert Czech korunas to old Sierra Leonean leones at the live mid-market rate. Reverse: SLL to CZK

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 CZK to SLE.

1 Czech Koruna =

1,058.85 SLL 0.00% today

1 CZK = 1,058.85 SLL · 1 SLL = 0.00094442 CZK

Mid-market rate, updated 08:12 UTC. Paid plans update as often as every 60 seconds. Get CZK→SLL rates via API

CZK to SLL over the last year

1,075.001,100.001,125.00Nov ’25Jan ’26Mar ’26May ’26Jul ’26Sep ’26
52-week high
1,128.48
52-week low
1,056.61
52-week average
1,090.80
Change over the year
−3.51%

Conversion tables

CZK to SLL
CZK SLL
1 CZK 1,058.85 SLL
10 CZK 10,588.47 SLL
100 CZK 105,884.74 SLL
1,000 CZK 1,058,847.39 SLL
10,000 CZK 10,588,473.88 SLL
50,000 CZK 52,942,369.42 SLL
100,000 CZK 105,884,738.83 SLL
SLL to CZK
SLL CZK
1 SLL 0.0009444 CZK
10 SLL 0.009444 CZK
100 SLL 0.09444 CZK
1,000 SLL 0.9444 CZK
10,000 SLL 9.44 CZK
50,000 SLL 47.22 CZK
100,000 SLL 94.44 CZK

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

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Questions about CZK to SLL

How much is 1 CZK in SLL?

1 Czech Koruna is 1,058.85 old Sierra Leonean leones at the mid-market rate of 4 October 2026, 08:12 UTC, and 1 SLL is 0.00094442 CZK.

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

Over the last 52 weeks 1 CZK ranged from 1,056.61 to 1,128.48 SLL, 1,090.80 SLL on average.

Which exchange rate is this?

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