Ether.fi (ETHFI) → Tether (USDT Optimism)

The order runs on autopilot: the rate is locked when you create it, and the payout leaves as soon as the network confirms your transfer. No manual approval, no working hours.

Rate and amounts for ETHFI → USDT Optimism 1 ETHFI = 0.770392 USDT Optimism 1 USDT Optimism = 1.298 ETHFI

Rate as of Sep 30, 2026 10:20

Orders from: 128.5204 ETHFI ≈ $98.96
Payout network: Optimism
24 hours: +11.35%

You send

ETHFI

You get 1,540.78

USDT Optimism

Create the order

Rate: 1 ETHFI = 0.770392 USDT Optimism
From: 128.5204 ETHFI
Up to: 13,000,000 ETHFI

Preliminary figure: the final amount is locked in the order.

Current maths: 0.770392 USDT Optimism for every ETHFI, and 1.298 ETHFI per USDT Optimism in reverse. Over 24 hours ETHFI/USDT Optimism came in at plus 11.35%. Over the week, plus 8.69%.

The weekly range ran from 0.639053 to 0.784148 USDT Optimism, a spread of 22.7%. One order takes from 128.5204 to 13,000,000 ETHFI. In dollars that is roughly $98.96.

The robot sends the payout in the Optimism network, so the address has to belong to that network — a transfer to another one will not arrive. Market capitalisation puts Ether.fi at No. 93 ($743.46 M) and Tether at No. 3 ($183.8 B). Over 90 days the daily moves of ETHFI and USDT correlate at 0.01 (they travel apart).

Which network USDT arrives in

The same USDT goes out in several networks. Each has its own rate and its own floor, and the fee is charged by the network itself.

Network	Per 1 ETHFI	From	Network fee	Speed
Ethereum (ERC20)	0.770392	128.5204 ETHFI	≈ $0.013	medium
TRON (TRC20)	0.770392	128.5204 ETHFI	≈ $2.3	fast
BNB Smart Chain (BEP20)	0.770392	128.5204 ETHFI	≈ $0.0025	fast
Solana	0.770392	128.5204 ETHFI	≈ $0.00059	fast
Arbitrum One	0.770392	128.5204 ETHFI	≈ $0.0035	fast
Avalanche C-Chain	0.770392	128.5204 ETHFI	≈ $0.0037	fast
NEAR	0.770392	128.5204 ETHFI	—	—
Optimism open	0.770392	128.5204 ETHFI	≈ $0.00018	fast

ETHFI → USDT: all networks side by side Network charges for USDT

Rate and amounts for ETHFI → USDT Optimism

Send ETHFI — receive USDT OptimismNeed USDT Optimism — send this much ETHFI

ETHFI	USDT Optimism
200	154.0785
1,000	770.3923
2,000	1,540.78
10,000	7,703.92
20,000	15,407.85
100,000	77,039.23

USDT Optimism	ETHFI
100	129.804
500	649.02
2,000	2,596.08
5,000	6,490.2
20,000	25,960.8
100,000	129,804

How the ETHFI → USDT Optimism exchange runs

Work out the amount in the calculator — orders start at 128.5204 ETHFI.
Give a USDT address on Optimism and a contact for the order.
Send ETHFI on Ether.fi, exactly the amount the order shows.
Nothing else is needed from you: as soon as the network confirms the transfer, the robot sends Tether to your address. The order page shows the status.

Swap ETHFI for USDT Optimism

Check this before sending ETHFI

The address network is Optimism. Sending through another network almost always means losing the transfer.
The transfer must not be smaller than 128.5204 ETHFI.
Copy the address in full, then check its first and last characters once it is pasted.
Send exactly the amount stated in the order: the automation matches your payment against it, and any difference sends the order back for recalculation.

How the ETHFI to USDT Optimism rate has moved

WeekMonthQuarterYear

high 0.784148 USDT Optimismlow 0.639053 USDT Optimism

Sep 23, 2026 10:21Sep 30, 2026 10:21

high 0.777999 USDT Optimismlow 0.52265 USDT Optimism

Aug 30, 2026 05:00Sep 29, 2026 05:00

high 0.777999 USDT Optimismlow 0.320071 USDT Optimism

Jul 1, 2026 05:00Sep 29, 2026 05:00

high 1.8251 USDT Optimismlow 0.286526 USDT Optimism

Oct 1, 2025 05:00Sep 29, 2026 05:00

24 hours: +11.35%
Week: +8.69%
Weekly high: 0.784148 USDT Optimism
Weekly low: 0.639053 USDT Optimism
Spread: 22.7%

Market data from CoinGecko as of Sep 30, 2026 09:57. The exchange rate is worked out separately and differs from the market one. How these numbers are counted

The ETHFI/USDT Optimism spread by period

Period	High	Low	Middle	Period result
24 hours	0.784148	0.684139	0.754831	+11.35%
Week	0.784148	0.639053	0.706984	+8.69%
Month	0.777999	0.52265	0.641538	+42.72%
Quarter	0.777999	0.320071	0.507822	+141.96%

Figures are in USDT Optimism per unit of the currency you send, taken from market data.

Daily ETHFI → USDT Optimism rate

Day	Close	Against the day before
Sep 29, 2026	0.777999 USDT Optimism	+8.05%
Sep 28, 2026	0.720037 USDT Optimism	−1.35%
Sep 27, 2026	0.729874 USDT Optimism	+1.4%
Sep 26, 2026	0.71979 USDT Optimism	+5.97%
Sep 25, 2026	0.679234 USDT Optimism	+4.73%
Sep 24, 2026	0.648544 USDT Optimism	−8.43%
Sep 23, 2026	0.708213 USDT Optimism	−1.04%

Market data: ETHFI and USDT

Ether.fi ETHFI

Price: $0.769968
24 hours: +11.35%
Week: +5.67%
Market cap: $743.46 M
24-hour turnover: $111.78 M
Rank by cap: #93
In circulation: 965.35 M ETHFI
All-time high: $8.53

Tether USDT

Price: $0.999619
24 hours: −0.01%
Week: −0.02%
Market cap: $183.8 B
24-hour turnover: $58.2 B
Rank by cap: #3
In circulation: 183.87 B USDT
All-time high: $1.32

Source: CoinGecko, Sep 30, 2026 09:57.

Ether.fi and Tether: how they differ

	Ether.fi (ETHFI)	Tether (USDT)
Ticker	ETHFI	USDT
In circulation	965.35 M ETHFI	183.87 B USDT
Market cap	$743.46 M	$183.8 B
Rank by cap	#93	#3
Type	—	token
Network	—	Optimism
Fees are paid in	—	ETH
Launched	—	2014
Built by	—	Tether Limited
Supply cap	—	no cap

Daily moves of ETHFI and USDT over the quarter link at 0.01 (they travel apart).

Why people take the ETHFI → USDT Optimism route

Stepping out of the swingsETHFI moved +42.68% over the past month. USDT tracks the dollar, so after the swap the amount stops following ETHFI.
It works both waysThe USDT Optimism → ETHFI direction is open as well — going back into ETHFI takes the same route and the same automation.

Common questions: ETHFI → USDT Optimism

What rate does ETHFI to USDT Optimism run at?

As of Sep 30, 2026 10:20 it is 1 ETHFI = 0.770392 USDT Optimism. The figure updates on its own, and the calculator always shows the current one. On the market that is around $0.770099.

What amounts does ETHFI → USDT Optimism accept?

From 128.5204 to 13,000,000 ETHFI per order. The floor is roughly $98.96.

Why can I not swap less than 128.5204 ETHFI?

The network fee and the handling do not depend on the amount. On a transfer below 128.5204 ETHFI they eat a noticeable share of it, and the swap stops making sense for either side.

Is anything charged on top of the rate?

No. The payout is already worked out at the rate in the calculator. Separately you pay only the network fee for sending ETHFI, and the blockchain takes that one.

How long does swapping ETHFI for USDT Optimism take?

The clock starts with confirmations: as soon as Ether.fi confirms your transfer, the order goes out for payout with no operator involved. After that the timing is set by how busy the network is — which is the difference between quick and instant.

Which network will USDT Optimism arrive in?

The payout goes out on Optimism. Check that the receiving wallet supports that network.

Which network is cheaper for receiving USDT?

Usually USDT BEP20, USDT SOL, USDT Arbitrum, USDT AVAX C, USDT Optimism works out cheaper. Still, the network is picked by what the recipient accepts, not by the fee.

What happens if the rate moves while I am paying?

Nothing: the rate is locked in the order and holds for as long as the order is alive. It is recalculated only if the payment arrives late or for a different amount — so send the exact sum, and send it promptly.

What did the ETHFI to USDT Optimism rate do over the month?

Over the month, plus 42.72%: a low of 0.52265, a high of 0.777999, an average of 0.641538 USDT Optimism per 1 ETHFI.

Can I swap back, USDT Optimism for ETHFI?

Yes, the reverse is open too: 1 USDT Optimism = 1.298 ETHFI. The link to switch sits under the calculator.