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Convert 100 Old Mauritanian Ouguiya (MRO) to São Tomé and Príncipe Dobra (STN)

Convert old Mauritanian ouguiyas to São Tomé and Príncipe dobras at the live mid-market rate. Reverse: STN to MRO

The Old Mauritanian Ouguiya is no longer in use

Old Mauritanian Ouguiya (MRO) was replaced by the Mauritanian Ouguiya (MRU) in 2018. For today’s money, convert MRU to STN.

100 old Mauritanian ouguiyas =

6.11 STN −0.61% today

1 MRO = 0.0611307 STN · 1 STN = 16.3584 MRO

Mid-market rate, updated 13:23 UTC. Paid plans update as often as every 60 seconds. Get MRO→STN rates via API

MRO to STN over the last year

0.0580.060.062Nov ’25Jan ’26Mar ’26May ’26Jul ’26Sep ’26
52-week high
0.061702
52-week low
0.057833
52-week average
0.059565
Change over the year
+4.15%

Conversion tables

MRO to STN
MRO STN
1 MRO 0.06113 STN
10 MRO 0.6113 STN
100 MRO 6.11 STN
1,000 MRO 61.13 STN
10,000 MRO 611.31 STN
50,000 MRO 3,056.54 STN
100,000 MRO 6,113.07 STN
STN to MRO
STN MRO
1 STN 16.36 MRO
10 STN 163.58 MRO
100 STN 1,635.84 MRO
1,000 STN 16,358.38 MRO
10,000 STN 163,583.81 MRO
50,000 STN 817,919.04 MRO
100,000 STN 1,635,838.07 MRO

Get MRO→STN rates via API

The live rate, the rate on any past day or a whole range, for STN 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=MRO -d currencies=STN \
  -H "apikey: YOUR-API-KEY"

# the rate on a past day
curl https://api.currencyapi.com/v3/historical \
  -G -d base_currency=MRO -d currencies=STN \
  -d date=2025-10-04 \
  -H "apikey: YOUR-API-KEY"

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Questions about MRO to STN

How much is 100 MRO in STN?

100 old Mauritanian ouguiyas is 6.11 São Tomé and Príncipe dobras at the mid-market rate of 4 October 2026, 13:23 UTC, when 1 MRO = 0.0611307 STN.

What was the MRO to STN rate over the last year?

Over the last 52 weeks 1 MRO ranged from 0.0578325 to 0.0617017 STN, 0.0595646 STN on average.

Which exchange rate is this?

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