Stablecoins from OP Mainnet (Optimism) to Arbitrum One: USDT Optimism → USDC Arbitrum

The direction runs at 0.9994 USDC Arbitrum per USDT Optimism, or 1.0006 USDT Optimism per USDC Arbitrum. Market over 24 hours: USDT Optimism against USDC Arbitrum a move of 0%. The week added minus 0.01%.

The weekly corridor ran from 0.998459 to 0.999713 USDC Arbitrum, a spread of 0.13%.

The payout leaves in the Arbitrum One network, so the receiving address has to belong to that network. By market cap Tether sits 3th ($179.94 B) and USD Coin 6th ($71.31 B). Daily moves of USDT and USDC over 90 days line up at 0.12 (they travel apart).

Who takes the USDT Optimism → USDC Arbitrum route

A road both waysThe USDC Arbitrum → USDT Optimism direction is open too, so going back into USDT takes the same route.

USDT Optimism → USDC Arbitrum rate and amounts

1 USDT Optimism = 0.9994 USDC Arbitrum

1 USDC Arbitrum = 1.0006 USDT Optimism

Send USDT Optimism — receive USDC Arbitrum

USDT Optimism	USDC Arbitrum
20	19.988
100	99.94
500	499.7002
5,000	4,997
20,000	19,988.01
100,000	99,940.04

Need USDC Arbitrum — send this much USDT Optimism

USDC Arbitrum	USDT Optimism
20	20.012
100	100.06
500	500.3
5,000	5,003
20,000	20,012
100,000	100,059.99

Payout network for USDC

The same USDC goes out in several networks. Rates and lower limits differ, and the fee is charged by the network itself.

Network	Per USDT Optimism	From	Network fee	Speed
Ethereum (ERC20)	0.9994	200 USDT Optimism	≈ $0.0064	medium
Solana	0.9994	200 USDT Optimism	≈ $0.00047	fast
Polygon	0.9994	200 USDT Optimism	≈ $0.0013	fast
Arbitrum One open now	0.9994	—	≈ $0.003	fast
BASE	0.9994	—	—	—
BNB Smart Chain (BEP20)	0.9994	—	≈ $0.0023	fast
Avalanche C-Chain	0.9994	—	≈ $0.0014	fast
NEAR	0.9994	—	—	—
Optimism	0.9994	—	≈ $0.00015	fast
XLM	0.9994	—	—	—

USDC network fees

How the USDT Optimism → USDC Arbitrum order runs

Work out the amount in the calculator and press the exchange button.
Enter a USDC address in Arbitrum One and a way to reach you.
Send USDT Optimism in Optimism for exactly the amount stated in the order.
Once the network confirms your transfer, USD Coin leaves for your address. The order page tracks every step.

Swap USDT Optimism for USDC Arbitrum

Check this before sending USDT Optimism

The address network is Arbitrum One. Sending through another network usually means losing the transfer.
Copy the address whole, then compare the first and last characters after pasting.
Ethereum, Arbitrum, Optimism, BNB Smart Chain and Polygon all use the same address shape (0x…). Make sure the wallet is switched to Arbitrum One.
To move USDC on later, put a little ETH at the same address.
Coins go through an AML check: a flagged transfer can be held until the check is finished.

OP Mainnet (Optimism) against Arbitrum One

	OP Mainnet (Optimism)	Arbitrum One
Network type	L2, optimistic rollup	L2, optimistic rollup
Fees are paid in	ETH	ETH
Fee level	≈ $0.00015	≈ $0.003
Speed	fast	fast
Block	~2 sec	~0.25 sec
Address shape	0x…	0x…
Memo or tag	not needed	not needed
Ethereum-style address (0x…)	yes	yes
Official withdrawal to Ethereum	≈ 7 days (challenge period)	≈ 7 days (challenge period)

Fee and speed levels are comparative: both move with how busy the network is.

How this differs from a classic bridge

	RubyCash	Classic bridge
What lands at your address	USDC in Arbitrum One	The same stablecoin; turning USDT into USDC is a separate step
Wallet and signatures	Not needed: the coins go to the address from the order	Needed: connect the wallet and sign contract transactions
A coin for fees in Arbitrum One	Not needed to receive	Often needed, or the funds cannot be claimed or moved on
Timing	After confirmations in OP Mainnet (Optimism); the order page tracks it	Depends on the bridge and the load of both networks
Who holds the funds meanwhile	RubyCash for the life of the order, with an AML check	The bridge contract or its validators

Bridge OP Mainnet (Optimism) → Arbitrum One: all directions The Arbitrum One network

Where the USDT Optimism to USDC Arbitrum rate has been

WeekMonthQuarterYear

high 0.999713 USDC Arbitrumlow 0.998459 USDC Arbitrum

Oct 26, 2026 10:34Nov 2, 2026 10:34

high 0.999991 USDC Arbitrumlow 0.999117 USDC Arbitrum

Oct 3, 2026 03:00Nov 2, 2026 03:00

high 1.0002 USDC Arbitrumlow 0.999117 USDC Arbitrum

Aug 4, 2026 03:00Nov 2, 2026 03:00

high 1.0031 USDC Arbitrumlow 0.996801 USDC Arbitrum

Nov 3, 2025 03:00Nov 2, 2026 03:00

24 hours: 0%
Week: −0.01%
Weekly high: 0.999713 USDC Arbitrum
Weekly low: 0.998459 USDC Arbitrum
Spread: 0.13%

Market data from CoinGecko as of Nov 2, 2026 10:24; the exchange rate is calculated separately and differs. Where these numbers come from

How far USDT Optimism/USDC Arbitrum travelled, by period

Period	High	Low	Middle	Net move
24 hours	0.99953	0.999392	0.999446	0%
Week	0.999713	0.998459	0.999426	−0.01%
Month	0.999991	0.999117	0.999533	−0.05%
Quarter	1.0002	0.999117	0.999733	−0.02%

Figures are in USDC Arbitrum per unit sent, from market data.

Daily USDT Optimism → USDC Arbitrum rate

Day	Close	Against the day before
Nov 2, 2026	0.999437 USDC Arbitrum	0%
Nov 1, 2026	0.999486 USDC Arbitrum	+0.01%
Oct 31, 2026	0.999338 USDC Arbitrum	+0.02%
Oct 30, 2026	0.999176 USDC Arbitrum	−0.04%
Oct 29, 2026	0.999561 USDC Arbitrum	+0.01%
Oct 28, 2026	0.999478 USDC Arbitrum	+0.02%
Oct 27, 2026	0.999325 USDC Arbitrum	0%

Daily RubyCash rate: USDT Optimism → USDC Arbitrum

Date	RubyCash rate	Market rate
Nov 2, 2026	0.9995 USDC Arbitrum	0.999436
Nov 1, 2026	0.9995 USDC Arbitrum	0.999432
Oct 31, 2026	0.998702 USDC Arbitrum	0.999476
Oct 30, 2026	0.998403 USDC Arbitrum	0.999365
Oct 29, 2026	0.998802 USDC Arbitrum	0.999407
Oct 28, 2026	0.999301 USDC Arbitrum	0.999585
Oct 27, 2026	0.998802 USDC Arbitrum	0.999479
Oct 26, 2026	0.998702 USDC Arbitrum	0.999358
Oct 25, 2026	0.999001 USDC Arbitrum	0.999502
Oct 24, 2026	0.998802 USDC Arbitrum	0.999553
Oct 22, 2026	0.999201 USDC Arbitrum	0.999452
Oct 21, 2026	0.999201 USDC Arbitrum	0.999671
Oct 20, 2026	0.9994 USDC Arbitrum	0.999452
Oct 19, 2026	0.999101 USDC Arbitrum	0.999297

Our own rate is written down every hour; the table keeps the last entry of each day. The market column is the ratio of the same two coins on CoinGecko at that moment. Where these numbers come from

The numbers on USDT and USDC

Tether USDT

Price: $0.998982
24 hours: −0.05%
Week: −0.04%
Market cap: $179.94 B
24-hour turnover: $31.05 B
Rank by cap: #3
In circulation: 180.12 B USDT
Record price: $1.32

USD Coin USDC

Price: $0.999528
24 hours: −0.04%
Week: −0.03%
Market cap: $71.31 B
24-hour turnover: $7.87 B
Rank by cap: #6
In circulation: 71.34 B USDC
Record price: $1.04

Source: CoinGecko, Nov 2, 2026 10:24.

Tether against USD Coin

	Tether (USDT)	USD Coin (USDC)
Ticker	USDT	USDC
Type	token	token
Network	Optimism	Arbitrum One
Fees are paid in	ETH	ETH
Launched	2014	2018
Built by	Tether Limited	Circle
Supply cap	no cap	no cap
In circulation	180.12 B USDT	71.34 B USDC
Market cap	$179.94 B	$71.31 B
Rank by cap	#3	#6

Daily moves of USDT and USDC over 90 days line up at 0.12 — they travel apart.

Common questions: USDT Optimism → USDC Arbitrum

What rate does USDT Optimism to USDC Arbitrum run at?

As of Nov 2, 2026 10:34 it is 1 USDT Optimism = 0.9994 USDC Arbitrum. The figure recalculates on its own, and the calculator always shows the fresh one. In dollars that is around $0.998929.

What else is taken on top of the rate?

The payout is already calculated at the rate in the calculator. On top of it you only pay the network fee for sending USDT Optimism, and that one goes to the blockchain, not to us.

How long does USDT Optimism to USDC Arbitrum take?

The clock starts with confirmations: the order goes into work once Optimism confirms your transfer. After that it comes down to how busy the network is. A block in Optimism closes in about 2 sec.

Which network will USDC Arbitrum arrive in?

The payout leaves in Arbitrum One. Make sure the receiving wallet works with that network.

Where is receiving USDC cheaper?

The cheapest is usually USDC SOL, USDC Polygon, USDC Arbitrum, USDC BEP20, USDC AVAX C, USDC Optimism. Still, the network is chosen by what the recipient supports, not by the fee.

Will native USDC arrive, or a wrapper?

USDC Arbitrum is the standard USDC token in Arbitrum One — exactly what exchanges send when they withdraw into this network.

Do I need ETH to receive USDC Arbitrum?

Not to receive. ETH comes into play later, when you want to send USDC from your address.

What if the rate moves while I am paying?

The rate is pinned to the order and does not move while the order is alive. It can be recalculated 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 USDC Arbitrum rate do this month?

The month came in at minus 0.05%. Low 0.999117, high 0.999991, middle 0.999533 USDC Arbitrum per USDT Optimism.

Can I go back, USDC Arbitrum to USDT Optimism?

Yes, the reverse direction is open: 1 USDC Arbitrum = 1.0008 USDT Optimism. The link sits right under the calculator.