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How to bridge ETH to Arbitrum: fees, speed & routes
Moving ETH onto Arbitrum sounds simple until you hit gas spikes and the 7-day exit. We'll break down how Across protocol and other routes compare, and how to bridge ARB back to ETH when you're ready.
Bridges
Numbers
Proven performance
TL;DR
Key takeaways
The official Arbitrum Bridge charges no protocol fee but locks withdrawals back to Ethereum for 7 days
Bridges like Across, deBridge and Symbiosis deliver ETH in seconds to minutes using pre-funded liquidity pools
Top routes land within 0.4% of each other on fees — pick by speed and features, not tiny cost gaps
ETH arrives as native ETH on Arbitrum One, ready for gas and DeFi — not a wrapped token
Always confirm the destination reads Arbitrum One, not Arbitrum Nova, before signing the transaction
17 minute reading
Bridges
Bridging ETH to Arbitrum: speed and fees at a glance
Moving ETH from Ethereum mainnet to Arbitrum is one of the most common actions in DeFi — but choosing the wrong method can cost you extra fees, force you to wait 7 days for a withdrawal, or expose you to avoidable risks. If you want to bridge ETH to Arbitrum, the canonical Arbitrum Bridge is the baseline option — but it is not always the cheapest or fastest. This guide compares the Arbitrum Bridge (canonical) and the best third-party routes, showing the safest and cheapest ways to bridge to Arbitrum using either the canonical route or top liquidity options. This is a step-by-step guide on how to bridge to Arbitrum safely using either approach. Concrete fee and speed data are included so you can make the right call for your transfer size and timeline. For a broader view of all ETH bridging options, see the best ETH bridge comparison on Symbiosis.
Parameters: Source = Ethereum mainnet • Destination = Arbitrum One • Asset = native ETH • Explorer = Arbiscan (arbiscan.io)
How to bridge ETH to Arbitrum (quick overview)
If you're searching how to bridge ETH to Arbitrum on MetaMask, the steps below are the fastest way to do it.
Open MetaMask and switch to Ethereum mainnet.
Navigate to
bridge.arbitrum.ioor an aggregator (e.g., Symbiosis).Select Ethereum → Arbitrum One and enter your ETH amount.
Review fees, estimated arrival time, and confirm destination = Arbitrum One.
Sign the transaction(s) in your wallet.
Confirm receipt on Arbiscan.
What does bridging ETH to Arbitrum actually mean?
Bridging ETH to Arbitrum means moving native ETH from Ethereum mainnet onto Arbitrum One, where it becomes spendable for gas and DeFi interactions. Two fundamentally different mechanisms exist for this transfer.
Definitions:
Canonical bridge (Arbitrum Bridge): The official rollup contract maintained by Offchain Labs, which finalizes deposits by locking ETH on Ethereum and minting an equivalent balance on Arbitrum One. Deposits confirm in 10–15 minutes; withdrawals trigger a 7-day challenge period required by Arbitrum's optimistic rollup fraud-proof system.
Liquidity bridge: A protocol that uses pre-funded liquidity pools on both chains to front the destination funds immediately, settling the cross-chain transaction asynchronously. Providers such as Across Protocol, Hop Protocol, and Stargate Finance achieve 1–3 minute transfer times by taking on short-term liquidity risk in return for a protocol fee.
Bridge aggregator: A smart routing layer that compares liquidity bridge quotes, Arbitrum Bridge parameters, and sometimes DEX liquidity in a single interface to optimize the transfer outcome across speed, cost, and reliability simultaneously.
One important clarification: ETH bridged to Arbitrum One arrives as native ETH, not a wrapped token — it is immediately usable for gas and all on-chain activity.
What are the main routes to bridge ETH to Arbitrum?
Three categories of route exist for moving ETH to Arbitrum, each optimized for a different priority. Selecting the right one depends on transfer size, acceptable wait time, and whether you need automated routing.
Arbitrum Bridge (canonical) (bridge.arbitrum.io): This Arbitrum One bridge is the canonical route operated directly by Offchain Labs. Canonical Arbitrum Bridge fees are primarily Ethereum L1 gas (~$3–$15 depending on congestion) — no protocol fee applies. Arbitrum bridge time for deposits is typically 10–15 minutes. The Arbitrum withdrawal time back to Ethereum is ~7 days on the canonical bridge, due to the fraud-proof challenge period — a critical detail most users overlook until it is too late. See the official Arbitrum Bridge documentation for full details.
Dedicated liquidity bridges — Across Protocol, Hop Protocol, and Stargate Finance — settle in seconds to a few minutes by using LP-funded pools. Third-party bridge fees for Arbitrum routes vary by protocol and route — typically 0.04% to 0.2% of the transfer amount, though some protocols use dynamic LP-fee + relayer-fee spreads rather than flat percentages. Across Protocol prices its fee as a dynamic spread between input and output amount (LP fee + relayer capital/gas cost; no separate protocol fee per Across fee docs) and uses UMA's optimistic oracle for verification.
Cross-chain aggregators (e.g., Symbiosis, Li.Fi, Socket) can help you find the best Arbitrum bridge for your amount by scanning multiple routes simultaneously — surfacing the best fee or fastest settlement for the exact amount at that moment, without requiring manual comparison across protocols.
Best Arbitrum bridge decision framework:
Best for large transfers ($5,000+): Arbitrum Bridge (canonical) — flat gas cost, no percentage fee
Best for speed on small-to-mid amounts (<$2,000): Liquidity bridge (Across, Hop, Stargate)
Best for optimal routing without manual research: Aggregator (Symbiosis, Li.Fi, Socket)
Best for automation and API access: Aggregator with programmatic integration
What you need before you start
A Web3 wallet — MetaMask or equivalent, with Ethereum mainnet selected.
ETH for the transfer amount plus L1 gas (budget at least $5–$20 extra during normal congestion).
Access to a verified bridge URL — bookmark
bridge.arbitrum.ioor your aggregator after your first confirmed visit; do not use links from ads or DMs.Confirmation of destination chain — Arbitrum One (not Arbitrum Nova; see FAQ for the difference). If you specifically need an Arbitrum Nova bridge, double-check the bridge supports Nova and that your destination app is on Nova.
A block explorer tab ready — Arbiscan to verify arrival.
Optional: hardware wallet for large transfers as an additional signing layer.
Lead Growth Product Manager
FAQs
Got questions?
Still have questions? Contact us and we’ll help you out.
01
What is the cheapest bridge from ETH to Arbitrum?
For most users moving $100 to $10,000 of ETH, an intent-based liquidity bridge like Across is typically cheapest, charging a relayer fee under $1 plus L1 gas. The official Arbitrum Bridge has no protocol fee at all — you pay only Ethereum L1 gas (~$3–$15) — so it wins for large transfers where percentage fees compound. Top third-party routes cluster within 0.4% of each other, so the right choice depends on transfer size, not fee differences alone.
02
Can I send ETH directly to Arbitrum?
You can move native ETH from Ethereum mainnet to Arbitrum One using the canonical Arbitrum Bridge at bridge.arbitrum.io, or via aggregators like Symbiosis that compare multiple routes in one view. The ETH arrives as native ETH — not a wrapped token — so it's immediately usable for gas and all on-chain activity. Just set source = Ethereum, destination = Arbitrum One, and confirm before signing.
03
How much does the official Arbitrum Bridge cost in fees?
The canonical Arbitrum Bridge charges no protocol fee — your only cost is Ethereum L1 gas to submit the deposit, typically around $3–$15 depending on network congestion. Third-party liquidity bridges add a protocol fee (roughly 0.04%–0.2% of the transfer), which makes them cheaper for small amounts but more expensive on large ones. That's why the canonical route is best for transfers of $5,000 or more.
04
How fast are deposits to Arbitrum from Ethereum?
Deposits through the official Arbitrum Bridge usually confirm in 10–15 minutes, depending on Ethereum confirmation times. Liquidity bridges like Across, Hop, and Stargate settle much faster — typically 1–3 minutes — by fronting funds from pre-funded pools. For speed-sensitive small-to-mid transfers, a liquidity bridge or aggregator is the better pick.
05
How fast is the official Arbitrum Bridge for withdrawals back to Ethereum?
Withdrawals from Arbitrum back to Ethereum through the canonical bridge take about 7 days, due to the optimistic rollup fraud-proof challenge period. This is a critical detail most users overlook until it's too late — deposits are fast, but the exit lock is real. Liquidity bridges offer "fast exits" that pay you on Ethereum immediately from a pool for an extra fee, bypassing the 7-day wait.
06
Why does withdrawing from Arbitrum take 7 days?
Arbitrum is an optimistic rollup, which assumes transactions are valid unless challenged. The 7-day window is the challenge period during which anyone can submit a fraud proof against batched L2 state before it finalizes on Ethereum. This design secures the rollup but means canonical withdrawals can't be rushed — only liquidity-based fast exits avoid the wait.
07
Can I bridge ETH to Arbitrum using MetaMask?
You can bridge directly through MetaMask by switching to Ethereum mainnet, then opening bridge.arbitrum.io or an aggregator like Symbiosis. Select Ethereum → Arbitrum One, enter your ETH amount, review the fee and ETA, and sign the transaction in your wallet. MetaMask works natively with all major bridge interfaces — no plugin needed — and you can verify arrival on Arbiscan.
08
Is it safe to use third-party bridges to move ETH to Arbitrum?
Top third-party bridges like Across, deBridge, and Symbiosis are audited and widely used in DeFi, but they carry smart contract risk that the canonical bridge doesn't. The biggest practical risks are fake bridge sites and sending to the wrong chain — reduce them by using bookmarked official URLs, starting with a small test transfer, and confirming the destination reads Arbitrum One (not Nova) before signing.
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