Tether (USDT Optimism) → Ether.fi (ETHFI)
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 USDT Optimism → ETHFI
1 USDT Optimism = 1.298 ETHFI
1 ETHFI = 0.770408 USDT Optimism
Rate as of Sep 30, 2026 10:20
- Orders from
- 100.67 USDT Optimism ≈ $100.63
- Payout network
- Ether.fi
- 24 hours
- −10.2%
Current maths: 1.298 ETHFI for every USDT Optimism, and 0.770408 USDT Optimism per ETHFI in reverse. Over 24 hours USDT Optimism/ETHFI came in at minus 10.2%. Over the week, minus 7.99%.
The weekly range ran from 1.2753 to 1.5648 ETHFI, a spread of 22.7%. One order takes from 100.67 to 10,000,000 USDT Optimism. In dollars that is roughly $100.63.
Market capitalisation puts Tether at No. 3 ($183.8 B) and Ether.fi at No. 93 ($743.46 M). Over 90 days the daily moves of USDT and ETHFI correlate at 0.01 (they travel apart).
Rate and amounts for USDT Optimism → ETHFI
| USDT Optimism | ETHFI |
|---|---|
| 200 | 259.6028 |
| 1,000 | 1,298.01 |
| 2,000 | 2,596.03 |
| 10,000 | 12,980.14 |
| 20,000 | 25,960.28 |
| 100,000 | 129,801.4 |
| ETHFI | USDT Optimism |
|---|---|
| 200 | 154.0815 |
| 1,000 | 770.4077 |
| 2,000 | 1,540.82 |
| 10,000 | 7,704.08 |
| 20,000 | 15,408.15 |
| 100,000 | 77,040.77 |
How the USDT Optimism → ETHFI exchange runs
- Work out the amount in the calculator — orders start at 100.67 USDT Optimism.
- Give a ETHFI address on Ether.fi and a contact for the order.
- Send USDT Optimism on Optimism, exactly the amount the order shows.
- Nothing else is needed from you: as soon as the network confirms the transfer, the robot sends Ether.fi to your address. The order page shows the status.
Check this before sending USDT Optimism
- The address network is Ether.fi. Sending through another network almost always means losing the transfer.
- The transfer must not be smaller than 100.67 USDT Optimism.
- 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 USDT Optimism to ETHFI rate has moved
high 1.5648 ETHFIlow 1.2753 ETHFI
Sep 23, 2026 10:21Sep 30, 2026 10:21
high 1.9133 ETHFIlow 1.2853 ETHFI
Aug 30, 2026 05:00Sep 29, 2026 05:00
high 3.1243 ETHFIlow 1.2853 ETHFI
Jul 1, 2026 05:00Sep 29, 2026 05:00
high 3.4901 ETHFIlow 0.547918 ETHFI
Oct 1, 2025 05:00Sep 29, 2026 05:00
- 24 hours
- −10.2%
- Week
- −7.99%
- Weekly high
- 1.5648 ETHFI
- Weekly low
- 1.2753 ETHFI
- 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 USDT Optimism/ETHFI spread by period
| Period | High | Low | Middle | Period result |
|---|---|---|---|---|
| 24 hours | 1.4617 | 1.2753 | 1.3274 | −10.2% |
| Week | 1.5648 | 1.2753 | 1.418 | −7.99% |
| Month | 1.9133 | 1.2853 | 1.5774 | −29.93% |
| Quarter | 3.1243 | 1.2853 | 2.0769 | −58.67% |
Figures are in ETHFI per unit of the currency you send, taken from market data.
Daily USDT Optimism → ETHFI rate
| Day | Close | Against the day before |
|---|---|---|
| Sep 29, 2026 | 1.2853 ETHFI | −7.45% |
| Sep 28, 2026 | 1.3888 ETHFI | +1.37% |
| Sep 27, 2026 | 1.3701 ETHFI | −1.38% |
| Sep 26, 2026 | 1.3893 ETHFI | −5.63% |
| Sep 25, 2026 | 1.4722 ETHFI | −4.52% |
| Sep 24, 2026 | 1.5419 ETHFI | +9.2% |
| Sep 23, 2026 | 1.412 ETHFI | +1.05% |
Market data: USDT and ETHFI
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
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
Source: CoinGecko, Sep 30, 2026 09:57.
Tether and Ether.fi: how they differ
| Tether (USDT) | Ether.fi (ETHFI) | |
|---|---|---|
| Ticker | USDT | ETHFI |
| Type | token | — |
| Network | Optimism | — |
| Fees are paid in | ETH | — |
| Launched | 2014 | — |
| Built by | Tether Limited | — |
| Supply cap | no cap | — |
| In circulation | 183.87 B USDT | 965.35 M ETHFI |
| Market cap | $183.8 B | $743.46 M |
| Rank by cap | #3 | #93 |
Daily moves of USDT and ETHFI over the quarter link at 0.01 (they travel apart).
Why people take the USDT Optimism → ETHFI route
- Entering ETHFI from dollarsUSDT goes into Ether.fi in one step, with no coin in between: over the last month ETHFI posted +42.68%.
- A DeFi protocol tokenEther.fi belongs to decentralised finance: holders govern the protocol with it and pay for operations inside it.
- Different basketsDaily moves of USDT and ETHFI over 90 days link at 0.01 (they travel apart) — the weaker the link, the less a portfolio rests on one coin.
Common questions: USDT Optimism → ETHFI
What rate does USDT Optimism to ETHFI run at?
As of Sep 30, 2026 10:20 it is 1 USDT Optimism = 1.298 ETHFI. The figure updates on its own, and the calculator always shows the current one. On the market that is around $0.999429.
What amounts does USDT Optimism → ETHFI accept?
From 100.67 to 10,000,000 USDT Optimism per order. The floor is roughly $100.63.
Why can I not swap less than 100.67 USDT Optimism?
The network fee and the handling do not depend on the amount. On a transfer below 100.67 USDT Optimism 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 USDT Optimism, and the blockchain takes that one.
How long does swapping USDT Optimism for ETHFI take?
The clock starts with confirmations: as soon as Optimism 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 ETHFI arrive in?
Ether.fi arrives in its own Ether.fi network — a plain ETHFI address is all you need.
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 USDT Optimism to ETHFI rate do over the month?
Over the month, minus 29.93%: a low of 1.2853, a high of 1.9133, an average of 1.5774 ETHFI per 1 USDT Optimism.
Can I swap back, ETHFI for USDT Optimism?
Yes, the reverse is open too: 1 ETHFI = 0.770392 USDT Optimism. The link to switch sits under the calculator.
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