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  2. ARB to MRO

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.

1 Arbitrum =

72.22 MRO +0.22% today

1 ARB = 72.225 MRO · 1 MRO = 0.0138456 ARB

Mid-market rate, updated 06:03 UTC. Paid plans update as often as every 60 seconds. Get ARB→MRO rates via API

ARB to MRO over the last year

50.00100.00150.00Nov ’25Jan ’26Mar ’26May ’26Jul ’26Sep ’26
52-week high
162.996
52-week low
26.142
52-week average
55.065
Change over the year
−53.40%

Conversion tables

ARB to MRO
ARB MRO
1 ARB 72.22 MRO
10 ARB 722.25 MRO
100 ARB 7,222.50 MRO
1,000 ARB 72,224.98 MRO
10,000 ARB 722,249.78 MRO
50,000 ARB 3,611,248.92 MRO
100,000 ARB 7,222,497.84 MRO
MRO to ARB
MRO ARB
1 MRO 0.01385 ARB
10 MRO 0.1385 ARB
100 MRO 1.38456255 ARB
1,000 MRO 13.84562550 ARB
10,000 MRO 138.45625500 ARB
50,000 MRO 692.28127500 ARB
100,000 MRO 1,384.56255000 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"

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Questions about ARB to MRO

How much is 1 ARB in MRO?

1 Arbitrum is 72.225 old Mauritanian ouguiyas at the mid-market rate of 4 October 2026, 06:03 UTC, and 1 MRO is 0.0138456 ARB.

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, 55.0647 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.