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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.

1 Old Mauritanian Ouguiya =

0.06109 STN −0.67% today

1 MRO = 0.0610947 STN · 1 STN = 16.368 MRO

Mid-market rate, updated 05:11 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
0.059564
Change over the year
+4.09%

Conversion tables

MRO to STN
MRO STN
1 MRO 0.06109 STN
10 MRO 0.6109 STN
100 MRO 6.11 STN
1,000 MRO 61.09 STN
10,000 MRO 610.95 STN
50,000 MRO 3,054.73 STN
100,000 MRO 6,109.47 STN
STN to MRO
STN MRO
1 STN 16.37 MRO
10 STN 163.68 MRO
100 STN 1,636.80 MRO
1,000 STN 16,368.04 MRO
10,000 STN 163,680.36 MRO
50,000 STN 818,401.82 MRO
100,000 STN 1,636,803.63 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 1 MRO in STN?

1 Old Mauritanian Ouguiya is 0.0610947 São Tomé and Príncipe dobras at the mid-market rate of 4 October 2026, 05:11 UTC, and 1 STN is 16.368 MRO.

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, 0.0595645 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.