USDC Optimism (OP Mainnet (Optimism)) → DAI (Ethereum)

Dollars change networks: send USDC Optimism in OP Mainnet (Optimism), collect DAI in Ethereum. One order.

Rate as of Nov 2, 2026 01:44

Orders from: 200 USDC Optimism ≈ $199.95
Payout network: Dai
24 hours: +0.01%

You send

USDC Optimism

You get 2,006.04

DAI

Start the order

Rate: 1 USDC Optimism = 1.003 DAI
From: 200 USDC Optimism
Up to: 10,000,000 USDC Optimism

The figure is indicative; the exact amount is locked in the order.

The direction runs at 1.003 DAI per USDC Optimism, or 0.996992 USDC Optimism per DAI. Market over 24 hours: USDC Optimism against DAI plus 0.01%. The week added plus 0.01%.

The weekly corridor ran from 0.99917 to 0.999991 DAI, a spread of 0.08%. A single order takes 200 to 10,000,000 USDC Optimism. In dollars that is roughly $199.95.

By market cap USD Coin sits 6th ($71.5 B) and Dai 23th ($4.52 B). Daily moves of USDC and DAI over 90 days line up at 0.14 (they travel apart).

Who takes the USDC Optimism → DAI route

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

USDC Optimism → DAI rate and amounts

1 USDC Optimism = 1.003 DAI

1 DAI = 0.996992 USDC Optimism

Send USDC Optimism — receive DAI

USDC Optimism	DAI
200	200.6035
1,000	1,003.02
2,000	2,006.04
10,000	10,030.18
20,000	20,060.35
100,000	100,301.75

Need DAI — send this much USDC Optimism

DAI	USDC Optimism
500	498.4958
1,000	996.9916
5,000	4,984.96
10,000	9,969.92
50,000	49,849.58
100,000	99,699.16

How the USDC Optimism → DAI order runs

Work out the amount in the calculator: orders start at 200 USDC Optimism.
Enter a DAI address in Dai 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, Dai leaves for your address. The order page tracks every step.

Swap USDC Optimism for DAI

Check this before sending USDC Optimism

The address network is Dai. 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 DAI 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	≈ $0.00015	≈ $0.0063
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	DAI 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 DAI rate has been

WeekMonthQuarterYear

high 0.999991 DAIlow 0.99917 DAI

Oct 26, 2026 01:46Nov 2, 2026 01:46

high 1.0002 DAIlow 0.999202 DAI

Oct 2, 2026 03:00Nov 1, 2026 03:00

high 1.0002 DAIlow 0.999202 DAI

Aug 3, 2026 03:00Nov 1, 2026 03:00

high 1.0081 DAIlow 0.998751 DAI

Nov 2, 2025 03:00Nov 1, 2026 03:00

24 hours: +0.01%
Week: +0.01%
Weekly high: 0.999991 DAI
Weekly low: 0.99917 DAI
Spread: 0.08%

Market data from CoinGecko as of Nov 1, 2026 23:54; the exchange rate is calculated separately and differs. Where these numbers come from

How far USDC Optimism/DAI travelled, by period

Period	High	Low	Middle	Net move
24 hours	0.99967	0.999374	0.999512	+0.01%
Week	0.999991	0.99917	0.999536	+0.01%
Month	1.0002	0.999202	0.999694	−0.08%
Quarter	1.0002	0.999202	0.999804	−0.03%

Figures are in DAI per unit sent, from market data.

Daily USDC Optimism → DAI rate

Day	Close	Against the day before
Nov 1, 2026	0.999202 DAI	−0.04%
Oct 31, 2026	0.999591 DAI	0%
Oct 30, 2026	0.999571 DAI	+0.01%
Oct 29, 2026	0.999483 DAI	0%
Oct 28, 2026	0.999453 DAI	+0.02%
Oct 27, 2026	0.999266 DAI	−0.04%
Oct 26, 2026	0.99963 DAI	+0.03%

Daily RubyCash rate: USDC Optimism → DAI

Date	RubyCash rate	Market rate
Nov 1, 2026	1.0031 DAI	0.999728
Oct 31, 2026	1.0038 DAI	0.999001
Oct 30, 2026	1.0041 DAI	0.999628
Oct 29, 2026	1.0037 DAI	0.999548
Oct 28, 2026	1.0032 DAI	0.999705
Oct 27, 2026	1.0037 DAI	0.999478
Oct 26, 2026	1.0038 DAI	0.999338
Oct 25, 2026	1.0035 DAI	0.999566
Oct 24, 2026	1.0037 DAI	0.999587
Oct 22, 2026	1.0033 DAI	0.999685
Oct 21, 2026	1.0033 DAI	1.0006
Oct 20, 2026	1.0031 DAI	0.999781
Oct 19, 2026	1.0034 DAI	0.99988
Oct 18, 2026	1.0036 DAI	0.999803

Our own rate is written down every hour; the table keeps the last entry of each day. The market column is the ratio of the same two coins on CoinGecko at that moment. Where these numbers come from

The numbers on USDC and DAI

USD Coin USDC

Price: $0.999728
24 hours: −0.03%
Week: +0.01%
Market cap: $71.5 B
24-hour turnover: $6.06 B
Rank by cap: #6
In circulation: 71.52 B USDC
Record price: $1.04

Dai DAI

Price: $1.00
24 hours: −0.04%
Week: 0%
Market cap: $4.52 B
24-hour turnover: $53.3 M
Rank by cap: #23
In circulation: 4.52 B DAI
Record price: $1.22

Source: CoinGecko, Nov 1, 2026 23:54.

USD Coin against Dai

	USD Coin (USDC)	Dai (DAI)
Ticker	USDC	DAI
Type	token	token
Network	Optimism	—
Fees are paid in	ETH	—
Launched	2018	2017
Built by	Circle	MakerDAO
Supply cap	no cap	no cap
In circulation	71.52 B USDC	4.52 B DAI
Market cap	$71.5 B	$4.52 B
Rank by cap	#6	#23

Daily moves of USDC and DAI over 90 days line up at 0.14 — they travel apart.

Common questions: USDC Optimism → DAI

What rate does USDC Optimism to DAI run at?

As of Nov 2, 2026 01:44 it is 1 USDC Optimism = 1.003 DAI. 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 → DAI accept?

From 200 to 10,000,000 USDC Optimism per order. The lower limit is roughly $199.95.

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 DAI 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 DAI arrive, or a wrapper?

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

Do I need ETH to receive DAI?

Not to receive. ETH comes into play later, when you want to send DAI 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 DAI arrives as soon as the order is processed.

Which network will DAI arrive in?

Dai leaves in its own Dai network — a plain DAI address is all you need.

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.

What did the USDC Optimism to DAI rate do this month?

The month came in at minus 0.08%. Low 0.999202, high 1.0002, middle 0.999694 DAI per USDC Optimism.

Can I go back, DAI to USDC Optimism?

Yes, the reverse direction is open: 1 DAI = 1.005 USDC Optimism. The link sits right under the calculator.