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

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

As of Sep 17, 2026 01:38 it is 1 USDT Optimism = 0.9994 USDC ERC20. The figure recalculates on its own, and the calculator always shows the fresh one. In dollars that is around $0.999125.

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

From 200 to 10,000,000 USDT Optimism per order. The lower limit is roughly $199.88.

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

Network fees and order handling eat a small transfer alive — below 200 USDT 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 USDT Optimism, and that one goes to the blockchain, not to us.

Q: How long does USDT Optimism to USDC 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 USDC arrive, or a wrapper?

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

Q: Do I need ETH to receive USDC ERC20?

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?

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

Q: Which network will USDC ERC20 arrive in?

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

Q: 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.

The direction runs at 0.9994 USDC ERC20 per USDT Optimism, or 1.0006 USDT Optimism per USDC ERC20. Market over 24 hours: USDT Optimism against USDC ERC20 minus 0.01%. The week added minus 0.03%.

The weekly corridor ran from 0.999474 to 0.999997 USDC ERC20, a spread of 0.05%. A single order takes 200 to 10,000,000 USDT Optimism. In dollars that is roughly $199.88.

The payout leaves in the Ethereum (ERC20) 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 Optimism → USDC ERC20 route

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

USDT Optimism → USDC ERC20 rate and amounts

1 USDT Optimism = 0.9994 USDC ERC20

1 USDC ERC20 = 1.0006 USDT Optimism

Send USDT Optimism — receive USDC ERC20

USDT Optimism	USDC ERC20
200	199.8801
1,000	999.4004
2,000	1,998.8
10,000	9,994
20,000	19,988.01
100,000	99,940.04

Need USDC ERC20 — send this much USDT Optimism

USDC ERC20	USDT Optimism
200	200.12
1,000	1,000.6
2,000	2,001.2
10,000	10,006
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) open now	0.9994	200 USDT Optimism	≈ $0.0081	medium
Solana	0.9994	200 USDT Optimism	≈ $0.00049	fast
Polygon	0.9994	200 USDT Optimism	≈ $0.0017	fast
Arbitrum One	0.9994	—	≈ $0.0031	fast
BASE	0.9994	—	—	—
BNB Smart Chain (BEP20)	0.9994	—	≈ $0.0023	fast
Avalanche C-Chain	0.9994	—	≈ < $0.0001	fast
NEAR	0.9994	—	—	—
Optimism	0.9994	—	≈ $0.00016	fast
XLM	0.9994	—	—	—

USDC network fees

How the USDT Optimism → USDC ERC20 order runs

Work out the amount in the calculator: orders start at 200 USDT Optimism.
Enter a USDC address in Ethereum (ERC20) 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 ERC20

Check this before sending USDT Optimism

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

	OP Mainnet (Optimism)	Ethereum
Network type	L2, optimistic rollup	Layer one (L1)
Fees are paid in	ETH	ETH
Fee level	≈ $0.00016	≈ $0.0081
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	USDC 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 USDT Optimism to USDC ERC20 rate has been

Week

high 0.999997 USDC ERC20low 0.999474 USDC ERC20

Sep 10, 2026 01:40Sep 17, 2026 01:40

24 hours: −0.01%
Week: −0.03%
Weekly high: 0.999997 USDC ERC20
Weekly low: 0.999474 USDC 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 USDT Optimism/USDC ERC20 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 ERC20 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	Optimism	Ethereum (ERC20)
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 Optimism → USDC ERC20

What rate does USDT Optimism to USDC ERC20 run at?

As of Sep 17, 2026 01:38 it is 1 USDT Optimism = 0.9994 USDC ERC20. The figure recalculates on its own, and the calculator always shows the fresh one. In dollars that is around $0.999125.

What amounts does USDT Optimism → USDC ERC20 accept?

From 200 to 10,000,000 USDT Optimism per order. The lower limit is roughly $199.88.

Where does the 200 USDT Optimism floor come from?

Network fees and order handling eat a small transfer alive — below 200 USDT 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 USDT Optimism, and that one goes to the blockchain, not to us.

How long does USDT Optimism to USDC 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 USDC arrive, or a wrapper?

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

Do I need ETH to receive USDC ERC20?

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?

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

Which network will USDC ERC20 arrive in?

The payout leaves in Ethereum (ERC20). 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.

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 ERC20 to USDT Optimism?

Yes, the reverse direction is open: 1 USDC ERC20 = 1.0008 USDT Optimism. The link sits right under the calculator.