Convert ERNon Optimism to B
Swap Ethos Reserve Note (ERN) on Optimism to BUILDon (B) at the best cross-chain rate. SwitchFi routes your ERN → B exchange across the top DEXs and bridges and settles straight from your wallet — non-custodial, no account, no sign-up.
ERN to B market data
| Metric | ERN · Optimism | B |
|---|---|---|
| Price | $0.9609 | $0.1502 |
| Market cap | $2.11M | $150.13M |
| 24h volume | $722 | $5.30M |
| 24h change | +0.21% | -2.65% |
| 7d change | +1.54% | -37.08% |
| 24h high / low | $0.9643 / $0.9498 | $0.1616 / $0.1492 |
| All-time high | $1.12 | $0.7635 |
| Market cap rank | #2191 | #201 |
What is the ERN to B exchange rate?
At the current market price, 1 ERN ≈ 6.3962 B, and 1 B ≈ 0.15634191 ERN. The rate moves with the market; the exact amount you receive is quoted from live liquidity in your wallet before you sign.
Ethos Reserve Note is the smaller side of this pair — BUILDon's market capitalisation of $150.13M is roughly 71× larger than Ethos Reserve Note's $2.11M. On the overall leaderboard they sit at #2191 and #201 respectively. Over the past 24 hours ERN is +0.21% while B is -2.65%, so the ERN/B rate has moved in ERN's favour. On a 7-day view the tape shows ERN +1.54% and B -37.08%. Daily turnover runs at $722 for ERN and $5.30M for B, so routed swaps between the two settle at market rates without moving the price. ERN currently trades 14.5% below its all-time high, while B sits 80.3% under its own peak.
ERN to B converter & price calculator
Indicative, based on current market prices. Get a live quote in the swap.
ERN / B conversion tables
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Live quote, net of DEX/bridge/gas fees. The final amount is confirmed in your wallet at execution.
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About Ethos Reserve Note and BUILDon
Ethos Reserve Note (ERN) is the #2191 cryptocurrency by market cap, worth $2.11M in aggregate. The price sits 14.5% under the record high of $1.12. There are currently 2.20M ERN in circulation. Recent performance reads +1.54% over 7 days and +2.07% over the past month for ERN. Its 24-hour trading volume is $722.
BUILDon (B) ranks #201 by market capitalisation at $150.13M. Compared with its $0.7635 all-time peak, it currently trades 80.3% lower. Of a maximum supply of 1.00B B, 1.00B B (100%) is already in circulation. Recent performance reads -37.08% over 7 days and -44.85% over the past month for B. Around $5.30M of B changes hands every 24 hours.
How to convert ERN to B
- 1 Enter the amount of ERN on Optimism you want to convert — the swap widget on this page is prefilled with the ERN → B pair.
- 2 Connect a compatible wallet: MetaMask, OKX, Trust Wallet, TokenPocket, TronLink, UniSat, Phantom and others.
- 3 Review the quoted route — the estimated and minimum amount of B you will receive, plus network, DEX and bridge fees, are all shown before you sign.
- 4 Confirm the transaction in your wallet and track the swap on the My transactions page until the funds arrive.
Other options to exchange B
Convert any other cryptocurrency from ERN
ERNOptimism → BTC
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ERNOptimism → ETH
Ethereum
ERNOptimism → USDTEthereum
Tether
ERNOptimism → BNB
BNB
ERNOptimism → USDCEthereum
USDC
ERNOptimism → XRP
XRP
ERNOptimism → SOL
Solana
ERNOptimism → TRX
TRON
ERNOptimism → FIGR_HELOC
Figure Heloc
ERNOptimism → HYPE
Hyperliquid
ERNOptimism → DOGE
Dogecoin
ERNOptimism → USDSEthereum
USDS
ERN to B FAQ
What is the ERN to B exchange rate?
1 ERN is worth roughly 6.3962 B at the moment (inverted: 1 B ≈ 0.15634191 ERN). This moves with the market; your wallet shows the exact executable amount before signing.
How to swap, exchange or convert ERN to B on SwitchFi?
Enter the amount of ERN you want to pay, connect your wallet, review the quote and confirm. SwitchFi routes the swap across DEXs and bridges to the best ERN→B path — non-custodial, straight from your wallet.
Is the ERN to B swap instant?
Speed depends on the route: same-chain trades are near-instant, while bridged cross-chain paths usually complete in a few minutes. Progress is trackable the whole way.
Are there fees to convert ERN to B?
SwitchFi shows the network, DEX and bridge fees up front in the quote. You always see the minimum you'll receive before confirming — there are no hidden custody fees because you never give up control of your funds.
Do I need an account to exchange ERN for B?
No account is needed. You connect a wallet, approve the swap and receive the funds directly — there is no registration or KYC step for on-chain swaps.
Market data by CoinGecko, cached server-side. Prices are informational — the exact swap rate is quoted at execution time.