Convert 100 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

100 Arbitrums =

7,198.52 MRO −0.11% today

1 ARB = 71.9852 MRO · 1 MRO = 0.0138918 ARB

Mid-market rate, updated 09:20 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: −53.56%

Conversion tables

ARB to MRO
ARB	MRO
1 ARB	71.99 MRO
10 ARB	719.85 MRO
100 ARB	7,198.52 MRO
1,000 ARB	71,985.17 MRO
10,000 ARB	719,851.71 MRO
50,000 ARB	3,599,258.54 MRO
100,000 ARB	7,198,517.07 MRO

MRO to ARB
MRO	ARB
1 MRO	0.01389 ARB
10 MRO	0.1389 ARB
100 MRO	1.38917501 ARB
1,000 MRO	13.89175010 ARB
10,000 MRO	138.91750100 ARB
50,000 MRO	694.58750500 ARB
100,000 MRO	1,389.17501000 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 100 ARB in MRO?

100 Arbitrums is 7,198.52 old Mauritanian ouguiyas at the mid-market rate of 4 October 2026, 09:20 UTC, when 1 ARB = 71.9852 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, 55.064 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.