Convert 10 Nigerian Naira (NGN) to Old Sierra Leonean Leone (SLL)

Convert Nigerian nairas to old Sierra Leonean leones at the live mid-market rate. Reverse: SLL to NGN

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 NGN to SLE.

Amount

From

10 Nigerian nairas =

173.05 SLL 0.00% today

1 NGN = 17.3054 SLL · 1 SLL = 0.0577853 NGN

Mid-market rate, updated 14:55 UTC. Paid plans update as often as every 60 seconds. Get NGN→SLL rates via API

NGN to SLL over the last year

52-week high: 17.369
52-week low: 15.351
52-week average: 16.457
Change over the year: +11.52%

Conversion tables

NGN to SLL
NGN	SLL
1 NGN	17.31 SLL
10 NGN	173.05 SLL
100 NGN	1,730.54 SLL
1,000 NGN	17,305.44 SLL
10,000 NGN	173,054.45 SLL
50,000 NGN	865,272.24 SLL
100,000 NGN	1,730,544.48 SLL

SLL to NGN
SLL	NGN
1 SLL	0.05779 NGN
10 SLL	0.5779 NGN
100 SLL	5.78 NGN
1,000 SLL	57.79 NGN
10,000 SLL	577.85 NGN
50,000 SLL	2,889.26 NGN
100,000 SLL	5,778.53 NGN

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

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Questions about NGN to SLL

How much is 10 NGN in SLL?

10 Nigerian nairas is 173.05 old Sierra Leonean leones at the mid-market rate of 4 October 2026, 14:55 UTC, when 1 NGN = 17.3054 SLL.

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

Over the last 52 weeks 1 NGN ranged from 15.3507 to 17.3689 SLL, 16.4575 SLL on average.

Which exchange rate is this?

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