Stablecoins from Ethereum to OP Mainnet (Optimism): USDT ERC20 → USDC Optimism

Q: What rate does USDT ERC20 to USDC Optimism run at?

As of Sep 17, 2026 01:08 it is 1 USDT ERC20 = 0.9995 USDC Optimism. The figure recalculates on its own, and the calculator always shows the fresh one. In dollars that is around $0.999224.

Q: 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 ERC20, and that one goes to the blockchain, not to us.

Q: How long does USDT ERC20 to USDC Optimism take?

The clock starts with confirmations: the order goes into work once Ethereum (ERC20) confirms your transfer. After that it comes down to how busy the network is. A block in Ethereum (ERC20) closes in about 12 sec.

Q: Which network will USDC Optimism arrive in?

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

Q: Where is receiving USDC cheaper?

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

Q: Will native USDC arrive, or a wrapper?

USDC Optimism is the standard USDC token in OP Mainnet (Optimism) — exactly what exchanges send when they withdraw into this network.

Q: Do I need ETH to receive USDC Optimism?

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

Q: What is wrong with the official OP Mainnet (Optimism) bridge?

An official deposit from Ethereum into OP Mainnet (Optimism) means connecting a wallet and signing a contract transaction. Here you simply send USDT ERC20 to the address from the order.

Q: 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.

Q: Can I go back, USDC Optimism to USDT ERC20?

Yes, the reverse direction is open: 1 USDC Optimism = 1.0007 USDT ERC20. The link sits right under the calculator.

Today USDT ERC20 goes for 0.9995 USDC Optimism, and USDC Optimism goes for 1.0005 USDT ERC20. Market over 24 hours: USDT ERC20 against USDC Optimism minus 0.01%. The week added minus 0.03%.

The weekly corridor ran from 0.999474 to 0.999997 USDC Optimism, a spread of 0.05%.

The payout leaves in the Optimism network, so the receiving address has to belong to that network. By market cap Tether sits 3th ($183.33 B) and USD Coin 6th ($73.61 B).

Who takes the USDT ERC20 → USDC Optimism route

A road both waysThe USDC Optimism → USDT ERC20 direction is open too, so going back into USDT takes the same route.

USDT ERC20 → USDC Optimism rate and amounts

1 USDT ERC20 = 0.9995 USDC Optimism

1 USDC Optimism = 1.0005 USDT ERC20

Send USDT ERC20 — receive USDC Optimism

USDT ERC20	USDC Optimism
20	19.99
100	99.95
500	499.7501
5,000	4,997.5
20,000	19,990
100,000	99,950.02

Need USDC Optimism — send this much USDT ERC20

USDC Optimism	USDT ERC20
20	20.01
100	100.05
500	500.25
5,000	5,002.5
20,000	20,010
100,000	100,050

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 ERC20	From	Network fee	Speed
Polygon	0.997595	100 USDT ERC20	≈ $0.0017	fast
Solana	1.0012	100 USDT ERC20	≈ $0.00049	fast
Ethereum (ERC20)	1.0012	100 USDT ERC20	≈ $0.012	medium
Arbitrum One	0.9995	—	≈ $0.0031	fast
BASE	0.9995	—	—	—
BNB Smart Chain (BEP20)	0.9995	—	≈ $0.0023	fast
Avalanche C-Chain	0.9995	—	≈ < $0.0001	fast
NEAR	0.9995	—	—	—
Optimism open now	0.9995	—	≈ $0.00016	fast
XLM	0.9995	—	—	—

USDC network fees

How the USDT ERC20 → USDC Optimism order runs

Work out the amount in the calculator and press the exchange button.
Enter a USDC address in Optimism and a way to reach you.
Send USDT ERC20 in Ethereum (ERC20) 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 ERC20 for USDC Optimism

Check this before sending USDT ERC20

The address network is Optimism. 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 OP Mainnet (Optimism).
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.

Ethereum against OP Mainnet (Optimism)

	Ethereum	OP Mainnet (Optimism)
Network type	Layer one (L1)	L2, optimistic rollup
Fees are paid in	ETH	ETH
Fee level	≈ $0.012	≈ $0.00016
Speed	medium	fast
Block	~12 sec	~2 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)

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 OP Mainnet (Optimism)	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 OP Mainnet (Optimism)	Not needed to receive	Often needed, or the funds cannot be claimed or moved on
Timing	After confirmations in Ethereum; 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 Ethereum → OP Mainnet (Optimism): all directions The OP Mainnet (Optimism) network

Where the USDT ERC20 to USDC Optimism rate has been

Week

high 0.999997 USDC Optimismlow 0.999474 USDC Optimism

Sep 10, 2026 01:09Sep 17, 2026 01:09

24 hours: −0.01%
Week: −0.03%
Weekly high: 0.999997 USDC Optimism
Weekly low: 0.999474 USDC Optimism
Spread: 0.05%

Market data from CoinGecko as of Sep 17, 2026 00:54; the exchange rate is calculated separately and differs. Where these numbers come from

How far USDT ERC20/USDC Optimism travelled, by period

Period	High	Low	Middle	Net move
24 hours	0.999733	0.999575	0.999673	−0.01%
Week	0.999997	0.999474	0.999843	−0.03%

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

The numbers on USDT and USDC

Tether USDT

Price: $0.99939
24 hours: −0.01%
Week: −0.1%
Market cap: $183.33 B
24-hour turnover: $59.59 B
Rank by cap: #3
In circulation: 183.44 B USDT
Record price: $1.32

USD Coin USDC

Price: $0.999724
24 hours: 0%
Week: 0%
Market cap: $73.61 B
24-hour turnover: $18.36 B
Rank by cap: #6
In circulation: 73.63 B USDC
Record price: $1.04

Source: CoinGecko, Sep 17, 2026 00:54.

Tether against USD Coin

	Tether (USDT)	USD Coin (USDC)
Ticker	USDT	USDC
Type	token	token
Network	Ethereum (ERC20)	Optimism
Fees are paid in	ETH	ETH
Launched	2014	2018
Built by	Tether Limited	Circle
Supply cap	no cap	no cap
In circulation	183.44 B USDT	73.63 B USDC
Market cap	$183.33 B	$73.61 B
Rank by cap	#3	#6

Common questions: USDT ERC20 → USDC Optimism

What rate does USDT ERC20 to USDC Optimism run at?

As of Sep 17, 2026 01:08 it is 1 USDT ERC20 = 0.9995 USDC Optimism. The figure recalculates on its own, and the calculator always shows the fresh one. In dollars that is around $0.999224.

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 ERC20, and that one goes to the blockchain, not to us.

How long does USDT ERC20 to USDC Optimism take?

The clock starts with confirmations: the order goes into work once Ethereum (ERC20) confirms your transfer. After that it comes down to how busy the network is. A block in Ethereum (ERC20) closes in about 12 sec.

Which network will USDC Optimism arrive in?

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

Where is receiving USDC cheaper?

The cheapest is usually USDC Polygon, USDC SOL, 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 Optimism is the standard USDC token in OP Mainnet (Optimism) — exactly what exchanges send when they withdraw into this network.

Do I need ETH to receive USDC Optimism?

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

What is wrong with the official OP Mainnet (Optimism) bridge?

An official deposit from Ethereum into OP Mainnet (Optimism) means connecting a wallet and signing a contract transaction. Here you simply send USDT ERC20 to the address from the order.

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.

Can I go back, USDC Optimism to USDT ERC20?

Yes, the reverse direction is open: 1 USDC Optimism = 1.0007 USDT ERC20. The link sits right under the calculator.