Tether (USDT 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 USDT Optimism → ARB 1 USDT Optimism = 4.9701 ARB 1 ARB = 0.201202 USDT Optimism

Rate as of Sep 30, 2026 11:35

Orders from: 100.67 USDT Optimism ≈ $100.63
Payout network: Arbitrum
24 hours: −0.58%

You send

USDT Optimism

You get 9,940.26

ARB

Create the order

Rate: 1 USDT Optimism = 4.9701 ARB
From: 100.67 USDT Optimism
Up to: 10,000,000 USDT Optimism

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

Current maths: 4.9701 ARB for every USDT Optimism, and 0.201202 USDT Optimism per ARB in reverse. Over 24 hours USDT Optimism/ARB came in at minus 0.58%. Over the week, plus 24%.

The weekly range ran from 3.9995 to 5.1135 ARB, a spread of 27.85%. One order takes from 100.67 to 10,000,000 USDT Optimism. In dollars that is roughly $100.63.

Market capitalisation puts Tether at No. 3 ($183.81 B) and Arbitrum at No. 68 ($1.37 B). Over 90 days the daily moves of USDT and ARB correlate at 0 (they travel apart).

Rate and amounts for USDT Optimism → ARB

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

USDT Optimism	ARB
200	994.0258
1,000	4,970.13
2,000	9,940.26
10,000	49,701.29
20,000	99,402.58
100,000	497,012.92

ARB	USDT Optimism
1,000	201.202
2,000	402.404
10,000	2,012.02
20,000	4,024.04
100,000	20,120.2
200,000	40,240.4

How the USDT Optimism → ARB exchange runs

Work out the amount in the calculator — orders start at 100.67 USDT Optimism.
Give a ARB address on Arbitrum and a contact for the order.
Send USDT 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 USDT Optimism for ARB

Check this before sending USDT Optimism

The address network is Arbitrum. Sending through another network almost always means losing the transfer.
The transfer must not be smaller than 100.67 USDT 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 USDT Optimism to ARB rate has moved

WeekMonthQuarterYear

high 5.1135 ARBlow 3.9995 ARB

Sep 23, 2026 11:38Sep 30, 2026 11:38

high 11.8744 ARBlow 4.2555 ARB

Aug 30, 2026 05:00Sep 29, 2026 05:00

high 13.7398 ARBlow 4.2555 ARB

Jul 1, 2026 05:00Sep 29, 2026 05:00

high 13.7398 ARBlow 2.1804 ARB

Oct 1, 2025 05:00Sep 29, 2026 05:00

24 hours: −0.58%
Week: +24%
Weekly high: 5.1135 ARB
Weekly low: 3.9995 ARB
Spread: 27.85%

Market data from CoinGecko as of Sep 30, 2026 11:27. The exchange rate is worked out separately and differs from the market one. How these numbers are counted

The USDT Optimism/ARB spread by period

Period	High	Low	Middle	Period result
24 hours	5.0186	4.6767	4.8685	−0.58%
Week	5.1135	3.9995	4.6026	+24%
Month	11.8744	4.2555	6.4011	−57.74%
Quarter	13.7398	4.2555	10.0928	−63.61%

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

Daily USDT Optimism → ARB rate

Day	Close	Against the day before
Sep 29, 2026	4.8218 ARB	+9.08%
Sep 28, 2026	4.4205 ARB	−1.8%
Sep 27, 2026	4.5015 ARB	+2.05%
Sep 26, 2026	4.4109 ARB	−4.51%
Sep 25, 2026	4.6194 ARB	−0.24%
Sep 24, 2026	4.6306 ARB	+8.81%
Sep 23, 2026	4.2555 ARB	−3.92%

Market data: USDT and ARB

Tether USDT

Price: $0.999645
24 hours: 0%
Week: −0.02%
Market cap: $183.81 B
24-hour turnover: $57.58 B
Rank by cap: #3
In circulation: 183.87 B USDT
All-time high: $1.32

Arbitrum ARB

Price: $0.20137
24 hours: +0.58%
Week: −16.64%
Market cap: $1.37 B
24-hour turnover: $273.39 M
Rank by cap: #68
In circulation: 6.79 B ARB
All-time high: $2.39

Source: CoinGecko, Sep 30, 2026 11:27.

Tether and Arbitrum: how they differ

	Tether (USDT)	Arbitrum (ARB)
Ticker	USDT	ARB
Type	token	token
Network	Optimism	—
Fees are paid in	ETH	—
Launched	2014	2023
Built by	Tether Limited	Offchain Labs
Supply cap	no cap	10 B ARB
In circulation	183.87 B USDT	6.79 B ARB
Market cap	$183.81 B	$1.37 B
Rank by cap	#3	#68

Daily moves of USDT and ARB over the quarter link at 0 (they travel apart).

Why people take the USDT Optimism → ARB route

Entering ARB from dollarsUSDT goes into Arbitrum in one step, with no coin in between: over the last month ARB posted +136.54%.
A DeFi protocol tokenArbitrum belongs to decentralised finance: holders govern the protocol with it and pay for operations inside it.
Different basketsDaily moves of USDT and ARB over 90 days link at 0 (they travel apart) — the weaker the link, the less a portfolio rests on one coin.

Common questions: USDT Optimism → ARB

What rate does USDT Optimism to ARB run at?

As of Sep 30, 2026 11:35 it is 1 USDT Optimism = 4.9701 ARB. The figure updates on its own, and the calculator always shows the current one. On the market that is around $1.00.

What amounts does USDT Optimism → ARB accept?

From 100.67 to 10,000,000 USDT Optimism per order. The floor is roughly $100.63.

Why can I not swap less than 100.67 USDT Optimism?

The network fee and the handling do not depend on the amount. On a transfer below 100.67 USDT 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 USDT Optimism, and the blockchain takes that one.

How long does swapping USDT 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 USDT Optimism to ARB rate do over the month?

Over the month, minus 57.74%: a low of 4.2555, a high of 11.8744, an average of 6.4011 ARB per 1 USDT Optimism.

Can I swap back, ARB for USDT Optimism?

Yes, the reverse is open too: 1 ARB = 0.201198 USDT Optimism. The link to switch sits under the calculator.

Tether (USDT Optimism) → Arbitrum (ARB)

Rate and amounts for USDT Optimism → ARB

How the USDT Optimism → ARB exchange runs

Check this before sending USDT Optimism

How the USDT Optimism to ARB rate has moved

The USDT Optimism/ARB spread by period

Daily USDT Optimism → ARB rate

Market data: USDT and ARB

Tether and Arbitrum: how they differ

Why people take the USDT Optimism → ARB route

Common questions: USDT Optimism → ARB

Related reading

Other directions

The other way round

Send USDT Optimism, receive something else

Receive ARB, send something else