Convert 1 Arbitrum (ARB) to Old Mauritanian Ouguiya (MRO)

Convert Arbitrums to old Mauritanian ouguiyas at the live mid-market rate. Reverse: MRO to ARB

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 ARB to MRU.

Amount

From

1 Arbitrum =

72.12 MRO +0.08% today

1 ARB = 72.1207 MRO · 1 MRO = 0.0138656 ARB

Mid-market rate, updated 10:09 UTC. Paid plans update as often as every 60 seconds. Get ARB→MRO rates via API

ARB to MRO over the last year

52-week high: 162.996
52-week low: 26.142
52-week average: 55.064
Change over the year: −53.47%

Conversion tables

ARB to MRO
ARB	MRO
1 ARB	72.12 MRO
10 ARB	721.21 MRO
100 ARB	7,212.07 MRO
1,000 ARB	72,120.71 MRO
10,000 ARB	721,207.13 MRO
50,000 ARB	3,606,035.67 MRO
100,000 ARB	7,212,071.33 MRO

MRO to ARB
MRO	ARB
1 MRO	0.01387 ARB
10 MRO	0.1387 ARB
100 MRO	1.38656421 ARB
1,000 MRO	13.86564210 ARB
10,000 MRO	138.65642100 ARB
50,000 MRO	693.28210500 ARB
100,000 MRO	1,386.56421000 ARB

Get ARB→MRO rates via API

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

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

Related conversions

Popular Arbitrum conversions

Popular Old Mauritanian Ouguiya conversions

Questions about ARB to MRO

How much is 1 ARB in MRO?

1 Arbitrum is 72.12 old Mauritanian ouguiyas at the mid-market rate of 4 October 2026, 10:09 UTC, when 1 ARB = 72.1207 MRO.

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

Over the last 52 weeks 1 ARB ranged from 26.1416 to 162.996 MRO, 55.0644 MRO on average.

Which exchange rate is this?

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