Convert 1 Old Mauritanian Ouguiya (MRO) to Old São Tomé Dobra (STD)

Convert old Mauritanian ouguiyas to old São Tomé dobras at the live mid-market rate. Reverse: STD 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 STD.

The Old São Tomé Dobra is no longer in use

Old São Tomé Dobra (STD) was replaced by the São Tomé and Príncipe Dobra (STN) in 2018. For today’s money, convert MRO to STN.

Amount

From

1 Old Mauritanian Ouguiya =

61.09 STD −0.67% today

1 MRO = 61.0947 STD · 1 STD = 0.016368 MRO

Mid-market rate, updated 04:49 UTC. Paid plans update as often as every 60 seconds. Get MRO→STD rates via API

MRO to STD over the last year

52-week high: 61.702
52-week low: 57.833
52-week average: 59.560
Change over the year: +4.09%

Conversion tables

MRO to STD
MRO	STD
1 MRO	61.09 STD
10 MRO	610.95 STD
100 MRO	6,109.47 STD
1,000 MRO	61,094.68 STD
10,000 MRO	610,946.82 STD
50,000 MRO	3,054,734.09 STD
100,000 MRO	6,109,468.18 STD

STD to MRO
STD	MRO
1 STD	0.01637 MRO
10 STD	0.1637 MRO
100 STD	1.64 MRO
1,000 STD	16.37 MRO
10,000 STD	163.68 MRO
50,000 STD	818.40 MRO
100,000 STD	1,636.80 MRO

Get MRO→STD rates via API

The live rate, the rate on any past day or a whole range, for STD 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=STD \
  -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=STD \
  -d date=2025-10-04 \
  -H "apikey: YOUR-API-KEY"

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Questions about MRO to STD

How much is 1 MRO in STD?

1 Old Mauritanian Ouguiya is 61.09 old São Tomé dobras at the mid-market rate of 4 October 2026, 04:49 UTC, when 1 MRO = 61.0947 STD.

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

Over the last 52 weeks 1 MRO ranged from 57.8325 to 61.7017 STD, 59.5605 STD on average.

Which exchange rate is this?

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