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

Q: What rate does DAI to USDC Optimism run at?

As of Sep 17, 2026 14:23 it is 1 DAI = 1.0052 USDC Optimism. The figure recalculates on its own, and the calculator always shows the fresh one. In dollars that is around $1.00.

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

Q: How long does DAI to USDC Optimism take?

The clock starts with confirmations: the order goes into work once Dai confirms your transfer. After that it comes down to how busy the network is. A block in Dai 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 DAI 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 DAI?

Yes, the reverse direction is open: 1 USDC Optimism = 1.0028 DAI. The link sits right under the calculator.

Today DAI goes for 1.0052 USDC Optimism, and USDC Optimism goes for 0.994819 DAI. Market over 24 hours: DAI against USDC Optimism minus 0.01%. The week added a move of 0%.

The weekly corridor ran from 0.999811 to 1.0005 USDC Optimism, a spread of 0.07%.

The payout leaves in the Optimism network, so the receiving address has to belong to that network. By market cap Dai sits 22th ($4.57 B) and USD Coin 6th ($73.6 B).

Who takes the DAI → USDC Optimism route

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

DAI → USDC Optimism rate and amounts

1 DAI = 1.0052 USDC Optimism

1 USDC Optimism = 0.994819 DAI

Send DAI — receive USDC Optimism

DAI	USDC Optimism
10	10.0521
50	50.2604
500	502.6042
2,000	2,010.42
20,000	20,104.17
100,000	100,520.85

Need USDC Optimism — send this much DAI

USDC Optimism	DAI
20	19.8964
100	99.4819
500	497.4093
5,000	4,974.09
20,000	19,896.37
100,000	99,481.85

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 DAI	From	Network fee	Speed
Polygon	1.0035	100 DAI	≈ $0.0017	fast
Solana	0.995891	100 DAI	≈ $0.0005	fast
Ethereum (ERC20)	0.995891	100 DAI	≈ $0.017	medium
Arbitrum One	1.0052	—	≈ $0.0032	fast
BASE	1.0052	—	—	—
BNB Smart Chain (BEP20)	1.0052	—	≈ $0.0024	fast
Avalanche C-Chain	1.0052	—	≈ < $0.0001	fast
NEAR	1.0052	—	—	—
Optimism open now	1.0052	—	≈ $0.00016	fast
XLM	1.0052	—	—	—

DAI → USDC: compare all networks USDC network fees

How the DAI → 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 DAI in Dai 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 DAI for USDC Optimism

Check this before sending DAI

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	≈ $0.017	≈ $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 DAI to USDC Optimism rate has been

Week

high 1.0005 USDC Optimismlow 0.999811 USDC Optimism

Sep 10, 2026 14:26Sep 17, 2026 14:26

24 hours: −0.01%
Week: 0%
Weekly high: 1.0005 USDC Optimism
Weekly low: 0.999811 USDC Optimism
Spread: 0.07%

Market data from CoinGecko as of Sep 17, 2026 11:54; the exchange rate is calculated separately and differs. Where these numbers come from

How far DAI/USDC Optimism travelled, by period

Period	High	Low	Middle	Net move
24 hours	1.0005	1.0001	1.0003	−0.01%
Week	1.0005	0.999811	1.0001	0%

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

The numbers on DAI and USDC

Dai DAI

Price: $0.999981
24 hours: −0.02%
Week: 0%
Market cap: $4.57 B
24-hour turnover: $320.11 M
Rank by cap: #22
In circulation: 4.58 B DAI
Record price: $1.22

USD Coin USDC

Price: $0.999551
24 hours: −0.01%
Week: 0%
Market cap: $73.6 B
24-hour turnover: $18.23 B
Rank by cap: #6
In circulation: 73.64 B USDC
Record price: $1.04

Source: CoinGecko, Sep 17, 2026 11:54.

Dai against USD Coin

	Dai (DAI)	USD Coin (USDC)
Ticker	DAI	USDC
Type	token	token
Launched	2017	2018
Built by	MakerDAO	Circle
Supply cap	no cap	no cap
In circulation	4.58 B DAI	73.64 B USDC
Market cap	$4.57 B	$73.6 B
Rank by cap	#22	#6
Network	—	Optimism
Fees are paid in	—	ETH

Common questions: DAI → USDC Optimism

What rate does DAI to USDC Optimism run at?

As of Sep 17, 2026 14:23 it is 1 DAI = 1.0052 USDC Optimism. The figure recalculates on its own, and the calculator always shows the fresh one. In dollars that is around $1.00.

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

How long does DAI to USDC Optimism take?

The clock starts with confirmations: the order goes into work once Dai confirms your transfer. After that it comes down to how busy the network is. A block in Dai 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 DAI 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 DAI?

Yes, the reverse direction is open: 1 USDC Optimism = 1.0028 DAI. The link sits right under the calculator.