Ethereum (ETH Optimism) → Simon's Cat (CAT)
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 ETH Optimism → CAT
1 ETH Optimism = 1,177,598,727.18 CAT
1 CAT = 0.000000000849 ETH Optimism
Rate as of Sep 30, 2026 15:10
- Orders from
- 0.0374734 ETH Optimism ≈ $100.77
- Payout network
- Simon's Cat
- 24 hours
- −1.21%
Right now 1 ETH Optimism gets you 1,177,598,727.18 CAT; the other way round, 1 CAT is 0.000000000849 ETH Optimism. Over 24 hours ETH Optimism/CAT came in at minus 1.21%. Over the week, minus 1.94%.
The weekly range ran from 1,110,735,390.03 to 1,279,684,308.61 CAT, a spread of 15.21%. One order takes from 0.0374734 to 3,720 ETH Optimism. In dollars that is roughly $100.77.
Market capitalisation puts Ethereum at No. 2 ($328.36 B) and Simon's Cat at No. 968 ($17.09 M). Over 90 days the daily moves of ETH and CAT correlate at 0.41 (they travel alike).
Rate and amounts for ETH Optimism → CAT
| ETH Optimism | CAT | ≈ USD |
|---|---|---|
| 0.05 | 58,879,936.36 | $134.46 |
| 0.2 | 235,519,745.44 | $537.85 |
| 0.5 | 588,799,363.59 | $1,344.62 |
| 2 | 2,355,197,454.35 | $5,378.48 |
| 5 | 5,887,993,635.89 | $13,446.20 |
| 20 | 23,551,974,543.55 | $53,784.80 |
| CAT | ETH Optimism | ≈ USD |
|---|---|---|
| 50,000,000 | 0.0424593 | $114.18 |
| 200,000,000 | 0.169837 | $456.73 |
| 500,000,000 | 0.424593 | $1,141.83 |
| 2,000,000,000 | 1.6984 | $4,567.33 |
| 5,000,000,000 | 4.2459 | $11,418.32 |
| 20,000,000,000 | 16.9837 | $45,673.28 |
How the ETH Optimism → CAT exchange runs
- Work out the amount in the calculator — orders start at 0.0374734 ETH Optimism.
- Give a CAT address on Simon's Cat and a contact for the order.
- Send ETH 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 Simon's Cat to your address. The order page shows the status.
Check this before sending ETH Optimism
- The address network is Simon's Cat. Sending through another network almost always means losing the transfer.
- The transfer must not be smaller than 0.0374734 ETH 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 ETH Optimism to CAT rate has moved
high 1,279,684,308.61 CATlow 1,110,735,390.03 CAT
Sep 23, 2026 15:14Sep 30, 2026 15:14
high 1,362,505,402.52 CATlow 979,020,728.1 CAT
Aug 30, 2026 05:00Sep 29, 2026 05:00
high 1,488,328,410.55 CATlow 897,041,548.78 CAT
Jul 1, 2026 05:00Sep 29, 2026 05:00
high 1,488,328,410.55 CATlow 515,827,515.98 CAT
Oct 1, 2025 05:00Sep 29, 2026 05:00
- 24 hours
- −1.21%
- Week
- −1.94%
- Weekly high
- 1,279,684,308.61 CAT
- Weekly low
- 1,110,735,390.03 CAT
- Spread
- 15.21%
Market data from CoinGecko as of Sep 30, 2026 14:57. The exchange rate is worked out separately and differs from the market one. How these numbers are counted
The ETH Optimism/CAT spread by period
| Period | High | Low | Middle | Period result |
|---|---|---|---|---|
| 24 hours | 1,218,094,027.37 | 1,178,271,317.83 | 1,197,970,910.71 | −1.21% |
| Week | 1,279,684,308.61 | 1,110,735,390.03 | 1,183,166,288.08 | −1.94% |
| Month | 1,362,505,402.52 | 979,020,728.1 | 1,225,654,172.71 | −4.48% |
| Quarter | 1,488,328,410.55 | 897,041,548.78 | 1,278,808,892.35 | −2.62% |
Figures are in CAT per unit of the currency you send, taken from market data.
Daily ETH Optimism → CAT rate
| Day | Close | Against the day before |
|---|---|---|
| Sep 29, 2026 | 1,212,757,717.41 CAT | +8.27% |
| Sep 28, 2026 | 1,120,174,720.46 CAT | −1.18% |
| Sep 27, 2026 | 1,133,528,410.29 CAT | −4.17% |
| Sep 26, 2026 | 1,182,877,336.98 CAT | +0.77% |
| Sep 25, 2026 | 1,173,791,388.59 CAT | −7.74% |
| Sep 24, 2026 | 1,272,219,334.09 CAT | +8.02% |
| Sep 23, 2026 | 1,177,743,222.02 CAT | −5.23% |
Market data: ETH and CAT
Ethereum ETH- Price
- $2,689.24
- 24 hours
- −1.09%
- Week
- −2.63%
- Market cap
- $328.36 B
- 24-hour turnover
- $13.36 B
- Rank by cap
- #2
- In circulation
- 122.09 M ETH
- All-time high
- $4,946.05
Simon's Cat CAT- Price
- $0.00000228
- 24 hours
- +0.12%
- Week
- −1.32%
- Market cap
- $17.09 M
- 24-hour turnover
- $766.53 K
- Rank by cap
- #968
- In circulation
- 7.5 T CAT
- All-time high
- $0.00006811
Source: CoinGecko, Sep 30, 2026 14:57.
Ethereum and Simon's Cat: how they differ
| Ethereum (ETH) | Simon's Cat (CAT) | |
|---|---|---|
| Ticker | ETH | CAT |
| Type | coin of its own network | — |
| Network | Optimism | — |
| Fees are paid in | ETH | — |
| Launched | 2015 | — |
| Built by | Vitalik Buterin | — |
| Consensus | Proof of Stake | — |
| Block | ~12 sec | — |
| Supply cap | no cap | — |
| Privacy | transfers are public | — |
| In circulation | 122.09 M ETH | 7.5 T CAT |
| Market cap | $328.36 B | $17.09 M |
| Rank by cap | #2 | #968 |
Daily moves of ETH and CAT over the quarter link at 0.41 (they travel alike).
Why people take the ETH Optimism → CAT route
- Different basketsDaily moves of ETH and CAT over 90 days link at 0.41 (they travel alike) — the weaker the link, the less a portfolio rests on one coin.
- It works both waysThe CAT → ETH Optimism direction is open as well — going back into ETH takes the same route and the same automation.
Common questions: ETH Optimism → CAT
What rate does ETH Optimism to CAT run at?
As of Sep 30, 2026 15:10 it is 1 ETH Optimism = 1,177,598,727.18 CAT. The figure updates on its own, and the calculator always shows the current one. On the market that is around $2,684.93.
What amounts does ETH Optimism → CAT accept?
From 0.0374734 to 3,720 ETH Optimism per order. The floor is roughly $100.77.
Why can I not swap less than 0.0374734 ETH Optimism?
The network fee and the handling do not depend on the amount. On a transfer below 0.0374734 ETH 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 ETH Optimism, and the blockchain takes that one.
How long does swapping ETH Optimism for CAT 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. A block in Optimism closes in about 12 sec.
Which network will CAT arrive in?
Simon's Cat arrives in its own Simon's Cat network — a plain CAT 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 ETH Optimism to CAT rate do over the month?
Over the month, minus 4.48%: a low of 979,020,728.1, a high of 1,362,505,402.52, an average of 1,225,654,172.71 CAT per 1 ETH Optimism.
Can I swap back, CAT for ETH Optimism?
Yes, the reverse is open too: 1 CAT = 0.000000000849 ETH Optimism. The link to switch sits under the calculator.
Related reading
Other directions
The other way round
Send ETH Optimism, receive something else
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ETH Optimism → CHZ163,208.17
ETH Optimism → COMP106.2303
ETH Optimism → CRV6,662.08
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ETH Optimism → CYBER8,223.76
ETH Optimism → DASH43.8457
ETH Optimism → DODO145,606.77
