Swap Tether (USDT Optimism) for USD Coin (USDC BASE)
The calculator does the maths at the live rate, the page lists the limits and the timing. Your rate is locked the moment the order is created.
Rate as of Sep 17, 2026 06:48
- Payout network
- BASE
- 24 hours
- −0.01%
You get
USDC BASE
Start the order
USDC BASE
The figure is indicative; the exact amount is locked in the order.
One USDT Optimism buys 0.9995 USDC BASE right now; the other way round, 1 USDC BASE is 1.0005 USDT Optimism. Market over 24 hours: USDT Optimism against USDC BASE minus 0.01%. The week added minus 0.02%.
The weekly corridor ran from 0.999474 to 0.999997 USDC BASE, a spread of 0.05%.
The payout leaves in the BASE network, so the receiving address has to belong to that network. By market cap Tether sits 3th ($183.3 B) and USD Coin 6th ($73.67 B).
Who takes the USDT Optimism → USDC BASE route
- A road both waysThe USDC BASE → USDT Optimism direction is open too, so going back into USDT takes the same route.
USDT Optimism → USDC BASE rate and amounts
1 USDT Optimism = 0.9995 USDC BASE
1 USDC BASE = 1.0005 USDT Optimism
Send USDT Optimism — receive USDC BASE
| USDT Optimism | USDC BASE |
|---|---|
| 20 | 19.99 |
| 100 | 99.95 |
| 500 | 499.7502 |
| 5,000 | 4,997.5 |
| 20,000 | 19,990.01 |
| 100,000 | 99,950.03 |
Need USDC BASE — send this much USDT Optimism
| USDC BASE | USDT Optimism |
|---|---|
| 20 | 20.01 |
| 100 | 100.05 |
| 500 | 500.25 |
| 5,000 | 5,002.5 |
| 20,000 | 20,010 |
| 100,000 | 100,049.99 |
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 USDT Optimism | From | Network fee | Speed |
|---|---|---|---|---|
| Ethereum (ERC20) | 0.9995 | 200 USDT Optimism | ≈ $0.008 | medium |
| Solana | 0.9995 | 200 USDT Optimism | ≈ $0.0005 | fast |
| Polygon | 0.9995 | 200 USDT Optimism | ≈ $0.0018 | fast |
| Arbitrum One | 0.9995 | — | ≈ $0.0032 | fast |
| BASE open now | 0.9995 | — | — | — |
| BNB Smart Chain (BEP20) | 0.9995 | — | ≈ $0.0024 | fast |
| Avalanche C-Chain | 0.9995 | — | ≈ < $0.0001 | fast |
| NEAR | 0.9995 | — | — | — |
| Optimism | 0.9995 | — | ≈ $0.00016 | fast |
| XLM | 0.9995 | — | — | — |
How the USDT Optimism → USDC BASE order runs
- Work out the amount in the calculator and press the exchange button.
- Enter a USDC address in BASE and a way to reach you.
- Send USDT Optimism in Optimism 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.
Check this before sending USDT Optimism
- The address network is BASE. Sending through another network usually means losing the transfer.
- Copy the address whole, then compare the first and last characters after pasting.
- Coins go through an AML check: a flagged transfer can be held until the check is finished.
Where the USDT Optimism to USDC BASE rate has been
high 0.999997 USDC BASElow 0.999474 USDC BASE
Sep 10, 2026 06:48Sep 17, 2026 06:48
- 24 hours
- −0.01%
- Week
- −0.02%
- Weekly high
- 0.999997 USDC BASE
- Weekly low
- 0.999474 USDC BASE
- Spread
- 0.05%
Market data from CoinGecko as of Sep 17, 2026 06:24; the exchange rate is calculated separately and differs. Where these numbers come from
How far USDT Optimism/USDC BASE travelled, by period
| Period | High | Low | Middle | Net move |
|---|---|---|---|---|
| 24 hours | 0.999731 | 0.999597 | 0.999663 | −0.01% |
| Week | 0.999997 | 0.999474 | 0.999837 | −0.02% |
Figures are in USDC BASE per unit sent, from market data.
The numbers on USDT and USDC
Tether USDT- Price
- $0.999228
- 24 hours
- −0.01%
- Week
- 0%
- Market cap
- $183.3 B
- 24-hour turnover
- $60.5 B
- Rank by cap
- #3
- In circulation
- 183.44 B USDT
- Record price
- $1.32
USD Coin USDC- Price
- $0.999615
- 24 hours
- −0.01%
- Week
- 0%
- Market cap
- $73.67 B
- 24-hour turnover
- $18.4 B
- Rank by cap
- #6
- In circulation
- 73.7 B USDC
- Record price
- $1.04
Source: CoinGecko, Sep 17, 2026 06:24.
Tether against USD Coin
| Tether (USDT) | USD Coin (USDC) | |
|---|---|---|
| Ticker | USDT | USDC |
| Type | token | token |
| Network | Optimism | BASE |
| Fees are paid in | ETH | — |
| Launched | 2014 | 2018 |
| Built by | Tether Limited | Circle |
| Supply cap | no cap | no cap |
| In circulation | 183.44 B USDT | 73.7 B USDC |
| Market cap | $183.3 B | $73.67 B |
| Rank by cap | #3 | #6 |
Common questions: USDT Optimism → USDC BASE
What rate does USDT Optimism to USDC BASE run at?
As of Sep 17, 2026 06:48 it is 1 USDT Optimism = 0.9995 USDC BASE. The figure recalculates on its own, and the calculator always shows the fresh one. In dollars that is around $0.999116.
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 USDT Optimism, and that one goes to the blockchain, not to us.
How long does USDT Optimism to USDC BASE 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.
Which network will USDC BASE arrive in?
The payout leaves in BASE. Make sure the receiving wallet works with that network.
Where is receiving USDC cheaper?
The cheapest is usually USDC SOL, USDC Polygon, USDC Arbitrum, USDC BEP20, USDC AVAX C, USDC Optimism. Still, the network is chosen by what the recipient supports, not by the fee.
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 BASE to USDT Optimism?
Yes, the reverse direction is open: 1 USDC BASE = 1.0007 USDT Optimism. The link sits right under the calculator.
Worth reading
Where else this can go
The other way round
Send USDT Optimism, receive something else
USDT Optimism → USDS1.0001- USDT Optimism → USDT Arbitrum1.0001
- USDT Optimism → USDT BEP201.0001
- USDT Optimism → USDT AVAX C1.0001
- USDT Optimism → USDT ERC201.0001
- USDT Optimism → USDT NEAR1.0001
- USDT Optimism → USDT OMNI1.0001
- USDT Optimism → USDT Polygon1.0001
Receive USDC BASE, send something else
- USDT Polygon → USDC BASE0.9995
- USDT SOL → USDC BASE0.9995
- USDT TON → USDC BASE0.9995
- USDT TRC20 → USDC BASE0.9995
WIF → USDC BASE0.184262
XAI → USDC BASE0.00693325
XAUT → USDC BASE4,304.48
XLM → USDC BASE0.184386