Optimism (OP Optimism) → Arbitrum (ARB)

The order runs on autopilot: the rate is locked when you create it, and the payout leaves as soon as the network confirms your transfer. No manual approval, no working hours.

Rate and amounts for OP Optimism → ARB 1 OP Optimism = 0.6449 ARB 1 ARB = 1.5506 OP Optimism

Rate as of Sep 30, 2026 20:00

Orders from: 772.0092 OP Optimism ≈ $100.73
Payout network: Arbitrum
24 hours: +0.56%

You send

OP Optimism

You get 6,449

ARB

Create the order

Rate: 1 OP Optimism = 0.6449 ARB
From: 772.0092 OP Optimism
Up to: 76,600,000 OP Optimism

Preliminary figure: the final amount is locked in the order.

The direction is holding at 0.6449 ARB per 1 OP Optimism (1.5506 OP Optimism per 1 ARB). Over 24 hours OP Optimism/ARB came in at plus 0.56%. Over the week, plus 10.94%.

The weekly range ran from 0.552319 to 0.671861 ARB, a spread of 21.64%. One order takes from 772.0092 to 76,600,000 OP Optimism. In dollars that is roughly $100.73.

Market capitalisation puts Optimism at No. 151 ($300.07 M) and Arbitrum at No. 68 ($1.37 B). Over 90 days the daily moves of OP and ARB correlate at 0.4 (they travel alike).

Rate and amounts for OP Optimism → ARB

Send OP Optimism — receive ARBNeed ARB — send this much OP Optimism

OP Optimism	ARB	≈ USD
1,000	644.8996	$130.48
5,000	3,224.5	$652.39
10,000	6,449	$1,304.78
50,000	32,244.98	$6,523.90
100,000	64,489.96	$13,047.80
500,000	322,449.79	$65,239.00

ARB	OP Optimism	≈ USD
500	775.3145	$101.16
2,000	3,101.26	$404.65
5,000	7,753.15	$1,011.61
20,000	31,012.58	$4,046.46
50,000	77,531.45	$10,116.15
200,000	310,125.8	$40,464.59

How the OP Optimism → ARB exchange runs

Work out the amount in the calculator — orders start at 772.0092 OP Optimism.
Give a ARB address on Arbitrum and a contact for the order.
Send OP Optimism on Optimism, exactly the amount the order shows.
Nothing else is needed from you: as soon as the network confirms the transfer, the robot sends Arbitrum to your address. The order page shows the status.

Swap OP Optimism for ARB

Check this before sending OP Optimism

The address network is Arbitrum. Sending through another network almost always means losing the transfer.
The transfer must not be smaller than 772.0092 OP Optimism.
Copy the address in full, then check its first and last characters once it is pasted.
Send exactly the amount stated in the order: the automation matches your payment against it, and any difference sends the order back for recalculation.

How the OP Optimism to ARB rate has moved

WeekMonthQuarterYear

high 0.671861 ARBlow 0.552319 ARB

Sep 23, 2026 20:03Sep 30, 2026 20:03

high 1.0265 ARBlow 0.545262 ARB

Aug 31, 2026 05:00Sep 30, 2026 05:00

high 1.3488 ARBlow 0.545262 ARB

Jul 2, 2026 05:00Sep 30, 2026 05:00

high 2.4583 ARBlow 0.545262 ARB

Oct 1, 2025 05:00Sep 30, 2026 05:00

24 hours: +0.56%
Week: +10.94%
Weekly high: 0.671861 ARB
Weekly low: 0.552319 ARB
Spread: 21.64%

Market data from CoinGecko as of Sep 30, 2026 19:57. The exchange rate is worked out separately and differs from the market one. How these numbers are counted

The OP Optimism/ARB spread by period

Period	High	Low	Middle	Period result
24 hours	0.657589	0.62998	0.6397	+0.56%
Week	0.671861	0.552319	0.630242	+10.94%
Month	1.0265	0.545262	0.668197	−36.68%
Quarter	1.3488	0.545262	0.971919	−47.75%

Figures are in ARB per unit of the currency you send, taken from market data.

Daily OP Optimism → ARB rate

Day	Close	Against the day before
Sep 30, 2026	0.649999 ARB	−2.24%
Sep 29, 2026	0.664893 ARB	+0.8%
Sep 28, 2026	0.659607 ARB	+1.86%
Sep 27, 2026	0.64758 ARB	+0.24%
Sep 26, 2026	0.646016 ARB	+6.41%
Sep 25, 2026	0.607128 ARB	+6.65%
Sep 24, 2026	0.569286 ARB	−0.97%

Market data: OP and ARB

Optimism OP

Price: $0.130478
24 hours: −3.6%
Week: −1.66%
Market cap: $300.07 M
24-hour turnover: $107.53 M
Rank by cap: #151
In circulation: 2.3 B OP
All-time high: $4.84

Arbitrum ARB

Price: $0.202028
24 hours: −4.14%
Week: −11.06%
Market cap: $1.37 B
24-hour turnover: $250.74 M
Rank by cap: #68
In circulation: 6.79 B ARB
All-time high: $2.39

Source: CoinGecko, Sep 30, 2026 19:57.

Optimism and Arbitrum: how they differ

	Optimism (OP)	Arbitrum (ARB)
Ticker	OP	ARB
Network	Optimism	—
Fees are paid in	ETH	—
In circulation	2.3 B OP	6.79 B ARB
Market cap	$300.07 M	$1.37 B
Rank by cap	#151	#68
Type	—	token
Launched	—	2023
Built by	—	Offchain Labs
Supply cap	—	10 B ARB

Daily moves of OP and ARB over the quarter link at 0.4 (they travel alike).

Why people take the OP Optimism → ARB route

A DeFi protocol tokenArbitrum belongs to decentralised finance: holders govern the protocol with it and pay for operations inside it.
Different basketsDaily moves of OP and ARB over 90 days link at 0.4 (they travel alike) — the weaker the link, the less a portfolio rests on one coin.
It works both waysThe ARB → OP Optimism direction is open as well — going back into OP takes the same route and the same automation.

Common questions: OP Optimism → ARB

What rate does OP Optimism to ARB run at?

As of Sep 30, 2026 20:00 it is 1 OP Optimism = 0.6449 ARB. The figure updates on its own, and the calculator always shows the current one. On the market that is around $0.130288.

What amounts does OP Optimism → ARB accept?

From 772.0092 to 76,600,000 OP Optimism per order. The floor is roughly $100.73.

Why can I not swap less than 772.0092 OP Optimism?

The network fee and the handling do not depend on the amount. On a transfer below 772.0092 OP Optimism they eat a noticeable share of it, and the swap stops making sense for either side.

Is anything charged on top of the rate?

No. The payout is already worked out at the rate in the calculator. Separately you pay only the network fee for sending OP Optimism, and the blockchain takes that one.

How long does swapping OP Optimism for ARB take?

The clock starts with confirmations: as soon as Optimism confirms your transfer, the order goes out for payout with no operator involved. After that the timing is set by how busy the network is — which is the difference between quick and instant.

Which network will ARB arrive in?

Arbitrum arrives in its own Arbitrum network — a plain ARB address is all you need.

What happens if the rate moves while I am paying?

Nothing: the rate is locked in the order and holds for as long as the order is alive. It is recalculated only if the payment arrives late or for a different amount — so send the exact sum, and send it promptly.

What did the OP Optimism to ARB rate do over the month?

Over the month, minus 36.68%: a low of 0.545262, a high of 1.0265, an average of 0.668197 ARB per 1 OP Optimism.

Can I swap back, ARB for OP Optimism?

Yes, the reverse is open too: 1 ARB = 1.5506 OP Optimism. The link to switch sits under the calculator.