Swap Cosmos (ATOM) for Arbitrum (ARB)
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 18, 2026 01:08
- Payout network
- Arbitrum
- 24 hours
- −4.89%
One ATOM buys 8.9943 ARB right now; the other way round, 1 ARB is 0.111182 ATOM. Market over 24 hours: ATOM against ARB minus 4.89%. The week added minus 29.74%.
The weekly corridor ran from 8.498 to 12.665 ARB, a spread of 49.04%.
By market cap Cosmos sits 81th ($825.23 M) and Arbitrum 69th ($1.2 B). Daily moves of ATOM and ARB over 90 days line up at 0.49 (they travel alike).
Who takes the ATOM → ARB route
- A DeFi protocol tokenArbitrum lives inside decentralised finance: it governs the protocol and pays for what happens in it.
- Different basketsDaily moves of ATOM and ARB over 90 days line up at 0.49 (they travel alike) — the looser the link, the less a portfolio depends on one coin.
- A road both waysThe ARB → ATOM direction is open too, so going back into ATOM takes the same route.
ATOM → ARB rate and amounts
1 ATOM = 8.9943 ARB
1 ARB = 0.111182 ATOM
Send ATOM — receive ARB
| ATOM | ARB | ≈ USD |
|---|---|---|
| 10 | 89.9429 | $15.50 |
| 50 | 449.7147 | $77.50 |
| 200 | 1,798.86 | $310.00 |
| 2,000 | 17,988.59 | $3,100.00 |
| 10,000 | 89,942.93 | $15,500.00 |
| 50,000 | 449,714.67 | $77,500.00 |
Need ARB — send this much ATOM
| ARB | ATOM | ≈ USD |
|---|---|---|
| 100 | 11.1182 | $17.23 |
| 500 | 55.5908 | $86.17 |
| 2,000 | 222.3632 | $344.66 |
| 20,000 | 2,223.63 | $3,446.63 |
| 100,000 | 11,118.16 | $17,233.15 |
| 500,000 | 55,590.8 | $86,165.75 |
How the ATOM → ARB order runs
- Work out the amount in the calculator and press the exchange button.
- Enter a ARB address in Arbitrum and a way to reach you.
- Send ATOM in Cosmos Hub for exactly the amount stated in the order.
- Once the network confirms your transfer, Arbitrum leaves for your address. The order page tracks every step.
Check this before sending ATOM
- The address network is Arbitrum. 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 ATOM to ARB rate has been
high 12.665 ARBlow 8.498 ARB
Sep 11, 2026 01:12Sep 18, 2026 01:12
high 18.8313 ARBlow 8.4361 ARB
Aug 18, 2026 03:00Sep 17, 2026 03:00
high 21.9877 ARBlow 8.4361 ARB
Jun 19, 2026 03:00Sep 17, 2026 03:00
high 27.7263 ARBlow 8.4361 ARB
Sep 18, 2025 03:00Sep 17, 2026 03:00
- 24 hours
- −4.89%
- Week
- −29.74%
- Weekly high
- 12.665 ARB
- Weekly low
- 8.498 ARB
- Spread
- 49.04%
Market data from CoinGecko as of Sep 17, 2026 22:24; the exchange rate is calculated separately and differs. Where these numbers come from
How far ATOM/ARB travelled, by period
| Period | High | Low | Middle | Net move |
|---|---|---|---|---|
| 24 hours | 9.3652 | 8.498 | 9.1401 | −4.89% |
| Week | 12.665 | 8.498 | 11.023 | −29.74% |
| Month | 18.8313 | 8.4361 | 13.7321 | −51.15% |
| Quarter | 21.9877 | 8.4361 | 16.8658 | −56.68% |
Figures are in ARB per unit sent, from market data.
Daily ATOM → ARB rate
| Day | Close | Against the day before |
|---|---|---|
| Sep 17, 2026 | 9.1997 ARB | −7.87% |
| Sep 16, 2026 | 9.9861 ARB | −15.67% |
| Sep 15, 2026 | 11.8422 ARB | −0.15% |
| Sep 14, 2026 | 11.8604 ARB | +3.77% |
| Sep 13, 2026 | 11.4293 ARB | −2.77% |
| Sep 12, 2026 | 11.7553 ARB | −8.12% |
| Sep 11, 2026 | 12.7938 ARB | +3.02% |
The numbers on ATOM and ARB
Cosmos ATOM- Price
- $1.55
- 24 hours
- +5.38%
- Week
- −13.7%
- Market cap
- $825.23 M
- 24-hour turnover
- $41.19 M
- Rank by cap
- #81
- In circulation
- 531.25 M ATOM
- Record price
- $43.84
Arbitrum ARB- Price
- $0.176538
- 24 hours
- +10.79%
- Week
- +19.1%
- Market cap
- $1.2 B
- 24-hour turnover
- $423.65 M
- Rank by cap
- #69
- In circulation
- 6.79 B ARB
- Record price
- $2.39
Source: CoinGecko, Sep 17, 2026 22:24.
Cosmos against Arbitrum
| Cosmos (ATOM) | Arbitrum (ARB) | |
|---|---|---|
| Ticker | ATOM | ARB |
| Type | coin of its own network | token |
| Launched | 2019 | 2023 |
| Built by | Jae Kwon, Ethan Buchman | Offchain Labs |
| Consensus | Proof of Stake (CometBFT) | — |
| Block | ~6 sec | — |
| Supply cap | no cap | 10 B ARB |
| Privacy | transfers are public | — |
| In circulation | 531.25 M ATOM | 6.79 B ARB |
| Market cap | $825.23 M | $1.2 B |
| Rank by cap | #81 | #69 |
Daily moves of ATOM and ARB over 90 days line up at 0.49 — they travel alike.
Common questions: ATOM → ARB
What rate does ATOM to ARB run at?
As of Sep 18, 2026 01:08 it is 1 ATOM = 8.9943 ARB. The figure recalculates on its own, and the calculator always shows the fresh one. In dollars that is around $1.59.
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 ATOM, and that one goes to the blockchain, not to us.
How long does ATOM to ARB take?
The clock starts with confirmations: the order goes into work once Cosmos Hub confirms your transfer. After that it comes down to how busy the network is. A block in Cosmos Hub closes in about 6 sec.
Which network will ARB arrive in?
Arbitrum leaves in its own Arbitrum network — a plain ARB 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 ATOM to ARB rate do this month?
The month came in at minus 51.15%. Low 8.4361, high 18.8313, middle 13.7321 ARB per ATOM.
Can I go back, ARB to ATOM?
Yes, the reverse direction is open: 1 ARB = 0.111741 ATOM. The link sits right under the calculator.
Worth reading
Where else this can go
The other way round
Send ATOM, receive something else
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