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

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

As of Sep 17, 2026 01:08 it is 1 USDC Optimism = 1.0007 USDT ERC20. The figure recalculates on its own, and the calculator always shows the fresh one. In dollars that is around $1.00.

Q: What amounts does USDC Optimism → USDT ERC20 accept?

From 200 to 10,000,000 USDC Optimism per order. The lower limit is roughly $199.94.

Q: Where does the 200 USDC Optimism floor come from?

Network fees and order handling eat a small transfer alive — below 200 USDC Optimism the swap stops making sense for either side.

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 USDC Optimism, and that one goes to the blockchain, not to us.

Q: How long does USDC Optimism to USDT ERC20 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.

Q: Will native USDT arrive, or a wrapper?

USDT ERC20 is the standard USDT token in Ethereum — exactly what exchanges send when they withdraw into this network.

Q: Do I need ETH to receive USDT ERC20?

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

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

The official withdrawal from OP Mainnet (Optimism) to Ethereum waits around seven days — that is the challenge period of an optimistic rollup. Here USDT ERC20 arrives as soon as the order is processed.

Q: Which network will USDT ERC20 arrive in?

The payout leaves in Ethereum (ERC20). Make sure the receiving wallet works with that network.

Q: Where is receiving USDT cheaper?

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

The direction runs at 1.0007 USDT ERC20 per USDC Optimism, or 0.9993 USDC Optimism per USDT ERC20. Market over 24 hours: USDC Optimism against USDT ERC20 plus 0.01%. The week added plus 0.04%.

The weekly corridor ran from 1 to 1.0005 USDT ERC20, a spread of 0.05%. A single order takes 200 to 10,000,000 USDC Optimism. In dollars that is roughly $199.94.

The payout leaves in the Ethereum (ERC20) network, so the receiving address has to belong to that network. By market cap USD Coin sits 6th ($73.61 B) and Tether 3th ($183.33 B).

Who takes the USDC Optimism → USDT ERC20 route

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

USDC Optimism → USDT ERC20 rate and amounts

1 USDC Optimism = 1.0007 USDT ERC20

1 USDT ERC20 = 0.9993 USDC Optimism

Send USDC Optimism — receive USDT ERC20

USDC Optimism	USDT ERC20
200	200.14
1,000	1,000.7
2,000	2,001.4
10,000	10,007
20,000	20,014
100,000	100,070

Need USDT ERC20 — send this much USDC Optimism

USDT ERC20	USDC Optimism
500	499.6502
1,000	999.3005
5,000	4,996.5
10,000	9,993
50,000	49,965.02
100,000	99,930.05

Payout network for USDT

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

Network	Per USDC Optimism	From	Network fee	Speed
OMNI	1.0007	—	—	—
Ethereum (ERC20) open now	1.0007	200 USDC Optimism	≈ $0.012	medium
TRON (TRC20)	1.0007	200 USDC Optimism	≈ $2.3	fast
BNB Smart Chain (BEP20)	1.0007	200 USDC Optimism	≈ $0.0023	fast
Solana	1.0007	200 USDC Optimism	≈ $0.00049	fast
Polygon	1.0007	200 USDC Optimism	≈ $0.0017	fast
Arbitrum One	1.0007	200 USDC Optimism	≈ $0.0031	fast
TON	1.0007	200 USDC Optimism	low	fast
Avalanche C-Chain	1.0007	—	≈ < $0.0001	fast
NEAR	1.0007	—	—	—
Optimism	1.0007	—	≈ $0.00016	fast

USDT network fees

How the USDC Optimism → USDT ERC20 order runs

Work out the amount in the calculator: orders start at 200 USDC Optimism.
Enter a USDT address in Ethereum (ERC20) and a way to reach you.
Send USDC Optimism in Optimism for exactly the amount stated in the order.
Once the network confirms your transfer, Tether leaves for your address. The order page tracks every step.

Swap USDC Optimism for USDT ERC20

Check this before sending USDC Optimism

The address network is Ethereum (ERC20). Sending through another network usually means losing the transfer.
The transfer must not be smaller than 200 USDC Optimism.
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 Ethereum.
To move USDT 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 Ethereum

	OP Mainnet (Optimism)	Ethereum
Network type	L2, optimistic rollup	Layer one (L1)
Fees are paid in	ETH	ETH
Fee level	≈ $0.00016	≈ $0.012
Speed	fast	medium
Block	~2 sec	~12 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	USDT in Ethereum	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 Ethereum	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	≈ 7 days for the official withdrawal from OP Mainnet (Optimism) to Ethereum
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) → Ethereum: all directions The Ethereum network

Where the USDC Optimism to USDT ERC20 rate has been

Week

high 1.0005 USDT ERC20low 1 USDT ERC20

Sep 10, 2026 01:08Sep 17, 2026 01:08

24 hours: +0.01%
Week: +0.04%
Weekly high: 1.0005 USDT ERC20
Weekly low: 1 USDT ERC20
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 USDC Optimism/USDT ERC20 travelled, by period

Period	High	Low	Middle	Net move
24 hours	1.0004	1.0003	1.0003	+0.01%
Week	1.0005	1	1.0002	+0.04%

Figures are in USDT ERC20 per unit sent, from market data.

The numbers on USDC and USDT

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

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

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

USD Coin against Tether

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

Common questions: USDC Optimism → USDT ERC20

What rate does USDC Optimism to USDT ERC20 run at?

As of Sep 17, 2026 01:08 it is 1 USDC Optimism = 1.0007 USDT ERC20. The figure recalculates on its own, and the calculator always shows the fresh one. In dollars that is around $1.00.

What amounts does USDC Optimism → USDT ERC20 accept?

From 200 to 10,000,000 USDC Optimism per order. The lower limit is roughly $199.94.

Where does the 200 USDC Optimism floor come from?

Network fees and order handling eat a small transfer alive — below 200 USDC Optimism the swap stops making sense for either side.

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 USDC Optimism, and that one goes to the blockchain, not to us.

How long does USDC Optimism to USDT ERC20 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.

Will native USDT arrive, or a wrapper?

USDT ERC20 is the standard USDT token in Ethereum — exactly what exchanges send when they withdraw into this network.

Do I need ETH to receive USDT ERC20?

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

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

The official withdrawal from OP Mainnet (Optimism) to Ethereum waits around seven days — that is the challenge period of an optimistic rollup. Here USDT ERC20 arrives as soon as the order is processed.

Which network will USDT ERC20 arrive in?

The payout leaves in Ethereum (ERC20). Make sure the receiving wallet works with that network.

Where is receiving USDT cheaper?

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

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, USDT ERC20 to USDC Optimism?

Yes, the reverse direction is open: 1 USDT ERC20 = 0.9995 USDC Optimism. The link sits right under the calculator.