Convert 1 Arbitrum (ARB) to Optimism (OP)

Convert Arbitrums to Optimism at the live mid-market rate. Reverse: OP to ARB

Amount

From

1 Arbitrum =

1.49911531 OP +1.44% today

1 ARB = 1.49912 OP · 1 OP = 0.66706 ARB

Mid-market rate, updated 05:04 UTC. Paid plans update as often as every 60 seconds. Get ARB→OP rates via API

ARB to OP over the last year

52-week high: 1.8372
52-week low: 0.5690
52-week average: 0.8577
Change over the year: +149.99%

Conversion tables

ARB to OP
ARB	OP
1 ARB	1.49911531 OP
10 ARB	14.99115312 OP
100 ARB	149.91153121 OP
1,000 ARB	1,499.11531210 OP
10,000 ARB	14,991.15312100 OP
50,000 ARB	74,955.76560500 OP
100,000 ARB	149,911.53121000 OP

OP to ARB
OP	ARB
1 OP	0.6671 ARB
10 OP	6.67060093 ARB
100 OP	66.70600933 ARB
1,000 OP	667.06009330 ARB
10,000 OP	6,670.60093300 ARB
50,000 OP	33,353.00466500 ARB
100,000 OP	66,706.00933000 ARB

Get ARB→OP rates via API

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

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Questions about ARB to OP

How much is 1 ARB in OP?

1 Arbitrum is 1.49911531 Optimism at the mid-market rate of 4 October 2026, 05:04 UTC, when 1 ARB = 1.49912 OP.

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

Over the last 52 weeks 1 ARB ranged from 0.569033 to 1.83715 OP, 0.857714 OP on average.

Which exchange rate is this?

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