Convert OP to B
Swap Optimism (OP) to BUILDon (B) at the best cross-chain rate. SwitchFi routes your OP → B exchange across the top DEXs and bridges and settles straight from your wallet — non-custodial, no account, no sign-up.
OP to B market data
| Metric | OP | B |
|---|---|---|
| Price | $0.09907 | $0.1301 |
| Market cap | $226.62M | $130.07M |
| 24h volume | $73.69M | $3.36M |
| 24h change | +3.69% | -3.53% |
| 7d change | -1.30% | +0.60% |
| 24h high / low | $0.09873 / $0.09318 | $0.1358 / $0.1286 |
| All-time high | $4.84 | $0.7626 |
| Market cap rank | #161 | #222 |
What is the OP to B exchange rate?
At the current market price, 1 OP ≈ 0.7616086 B, and 1 B ≈ 1.313 OP. The rate moves with the market; the exact amount you receive is quoted from live liquidity in your wallet before you sign.
Optimism brings the bigger balance sheet here: $226.62M in market capitalisation against $130.07M for BUILDon. On the overall leaderboard they sit at #161 and #222 respectively. Day-on-day, OP printed +3.69% and B printed -3.53%, meaning the exchange rate between them has moved in OP's favour. Across the last 7 days the comparison reads -1.30% for OP versus +0.60% for B. Liquidity is ample on both legs — OP trades $73.69M a day and B trades $3.36M — so conversions execute at market rates. Measured from record highs, OP is down 98.0% and B is down 82.9%.
OP to B converter & price calculator
Indicative, based on current market prices. Get a live quote in the swap.
OP / 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.
Indicative estimate — the exact amount is confirmed in your wallet at execution.
About Optimism and BUILDon
Optimism (OP) is the #161 cryptocurrency by market cap, worth $226.62M in aggregate. The price sits 98.0% under the record high of $4.84. Of a maximum supply of 4.29B OP, 2.29B OP (53%) is already in circulation. OP has moved -1.30% week-on-week and +11.00% over 30 days. Its 24-hour trading volume is $73.69M.
BUILDon (B) ranks #222 by market capitalisation at $130.07M. Compared with its $0.7626 all-time peak, it currently trades 82.9% lower. Of a maximum supply of 1.00B B, 1.00B B (100%) is already in circulation. Recent performance reads +0.60% over 7 days and -21.80% over the past month for B. Around $3.36M of B changes hands every 24 hours.
How to convert OP to B
- 1 Enter the amount of OP you want to convert — the swap widget on this page is prefilled with the OP → 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 OP
OP to B FAQ
What is the OP to B exchange rate?
1 OP is worth roughly 0.7616086 B at the moment (inverted: 1 B ≈ 1.313 OP). This moves with the market; your wallet shows the exact executable amount before signing.
How to swap, exchange or convert OP to B on SwitchFi?
Three steps: set the OP amount, connect your wallet, then approve the best quoted OP→B route. Funds move wallet-to-wallet — SwitchFi never holds them.
Is the OP to B swap instant?
Same-chain swaps settle in seconds; cross-chain routes typically take a few minutes while the bridge confirms on both sides. You can track live status until the funds land.
Are there fees to convert OP 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 OP for B?
No. SwitchFi is a non-custodial router — connect a compatible wallet and swap. No sign-up, no KYC to use the on-chain swap.
Market data by CoinGecko, cached server-side. Prices are informational — the exact swap rate is quoted at execution time.