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

The direction runs at 1.0056 USDT Optimism per DAI, or 0.994421 DAI per USDT Optimism. Market over 24 hours: DAI against USDT Optimism a move of 0%. The week added plus 0.03%.

The weekly corridor ran from 0.999851 to 1.001 USDT Optimism, a spread of 0.11%.

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 Tether 3th ($183.28 B).

Who takes the DAI → USDT Optimism route

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

DAI → USDT Optimism rate and amounts

1 DAI = 1.0056 USDT Optimism

1 USDT Optimism = 0.994421 DAI

Send DAI — receive USDT Optimism

DAI	USDT Optimism
10	10.0561
50	50.2805
500	502.8053
2,000	2,011.22
20,000	20,112.21
100,000	100,561.06

Need USDT Optimism — send this much DAI

USDT Optimism	DAI
20	19.8884
100	99.4421
500	497.2104
5,000	4,972.1
20,000	19,888.42
100,000	99,442.08

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 DAI	From	Network fee	Speed
Solana	1.0021	100 DAI	≈ $0.0005	fast
TRON (TRC20)	1.0021	100 DAI	≈ $2.3	fast
Polygon	1.0021	100 DAI	≈ $0.0017	fast
Arbitrum One	1.0056	100 DAI	≈ $0.0032	fast
TON	1.0021	100 DAI	low	fast
Ethereum (ERC20)	0.99809	100 DAI	≈ $0.028	medium
OMNI	1.0056	—	—	—
BNB Smart Chain (BEP20)	1.0056	200 DAI	≈ $0.0024	fast
Avalanche C-Chain	1.0056	—	≈ $0.00019	fast
NEAR	1.0056	—	—	—
Optimism open now	1.0056	—	≈ $0.00017	fast

DAI → USDT: compare all networks USDT network fees

How the DAI → USDT Optimism order runs

Work out the amount in the calculator and press the exchange button.
Enter a USDT 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, Tether leaves for your address. The order page tracks every step.

Swap DAI for USDT 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 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.

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	≈ $0.028	≈ $0.00017
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	USDT 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 USDT Optimism rate has been

Week

high 1.001 USDT Optimismlow 0.999851 USDT Optimism

Sep 10, 2026 12:21Sep 17, 2026 12:21

24 hours: 0%
Week: +0.03%
Weekly high: 1.001 USDT Optimism
Weekly low: 0.999851 USDT Optimism
Spread: 0.11%

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/USDT Optimism travelled, by period

Period	High	Low	Middle	Net move
24 hours	1.001	1.0004	1.0007	0%
Week	1.001	0.999851	1.0003	+0.03%

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

The numbers on DAI and USDT

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

Tether USDT

Price: $0.999122
24 hours: −0.02%
Week: 0%
Market cap: $183.28 B
24-hour turnover: $58.85 B
Rank by cap: #3
In circulation: 183.44 B USDT
Record price: $1.32

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

Dai against Tether

	Dai (DAI)	Tether (USDT)
Ticker	DAI	USDT
Type	token	token
Launched	2017	2014
Built by	MakerDAO	Tether Limited
Supply cap	no cap	no cap
In circulation	4.58 B DAI	183.44 B USDT
Market cap	$4.57 B	$183.28 B
Rank by cap	#22	#3
Network	—	Optimism
Fees are paid in	—	ETH

Common questions: DAI → USDT Optimism

What rate does DAI to USDT Optimism run at?

As of Sep 17, 2026 12:18 it is 1 DAI = 1.0056 USDT 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 USDT 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 USDT Optimism arrive in?

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

Where is receiving USDT cheaper?

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

Will native USDT arrive, or a wrapper?

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

Do I need ETH to receive USDT Optimism?

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?

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, USDT Optimism to DAI?

Yes, the reverse direction is open: 1 USDT Optimism = 1.0024 DAI. The link sits right under the calculator.