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  2. MNT to SLL

Mongolian Tugrik (MNT) to Old Sierra Leonean Leone (SLL)

Convert Mongolian Tugrik to old Sierra Leonean leones at the live mid-market rate. Reverse: SLL to MNT

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 MNT to SLE.

1 Mongolian Tugrik =

6.39 SLL 0.00% today

1 MNT = 6.39158 SLL · 1 SLL = 0.156456 MNT

Mid-market rate, updated 03:56 UTC. Paid plans update as often as every 60 seconds. Get MNT→SLL rates via API

MNT to SLL over the last year

6.306.40Nov ’25Jan ’26Mar ’26May ’26Jul ’26Sep ’26
52-week high
6.4755
52-week low
6.2857
52-week average
6.3728
Change over the year
+1.34%

Conversion tables

MNT to SLL
MNT SLL
1 MNT 6.39 SLL
10 MNT 63.92 SLL
100 MNT 639.16 SLL
1,000 MNT 6,391.58 SLL
10,000 MNT 63,915.78 SLL
50,000 MNT 319,578.92 SLL
100,000 MNT 639,157.83 SLL
SLL to MNT
SLL MNT
1 SLL 0.1565 MNT
10 SLL 1.56 MNT
100 SLL 15.65 MNT
1,000 SLL 156.46 MNT
10,000 SLL 1,564.56 MNT
50,000 SLL 7,822.79 MNT
100,000 SLL 15,645.59 MNT

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

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Questions about MNT to SLL

How much is 1 MNT in SLL?

1 Mongolian Tugrik is 6.39158 old Sierra Leonean leones at the mid-market rate of 4 October 2026, 03:56 UTC, and 1 SLL is 0.156456 MNT.

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

Over the last 52 weeks 1 MNT ranged from 6.28566 to 6.47546 SLL, 6.37277 SLL on average.

Which exchange rate is this?

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