Uniswap v2 Gas Fee Calculator
Swap Fee Calculator
Calculate gas costs and fees for swaps on Uniswap v2 on Arbitrum
Fee Tiers
Very stable pairs
Stable pairs
Standard pairs
Exotic pairs
Arbitrum fee: Approximately $0.03 per transaction
Ethereum fee: $5-$10 during peak times
Your Swap Analysis
Estimated Cost:
Arbitrum: $0.03
Ethereum: $7.50
Total Savings: $7.47
If you’ve been hunting for a fast, cheap way to swap tokens without handing over control of your wallet, the Uniswap v2 decentralized exchange (DEX) that runs on the Arbitrum layer‑2 network is worth a close look. In 2025 the platform still attracts a huge share of the DEX volume on Arbitrum, thanks to near‑instant swaps, deep liquidity pools and a fee model that adapts to the risk profile of each pair. This review breaks down what makes Uniswap v2 tick on Arbitrum, walks you through a typical trade, compares it with the newer v3 implementation, and points out the pitfalls you should keep an eye on.
Why Arbitrum matters for Uniswap
Arbitrum an Optimistic Rollup layer‑2 solution launched by Offchain Labs in 2021 was built to slash the high gas fees and sluggish transaction times that plague Ethereum’s mainnet. By batching transactions off‑chain and posting a succinct proof to Ethereum, Arbitrum can process thousands of swaps per second while keeping fees in the low‑cent range.
For a DEX like Uniswap, the benefits are immediate: liquidity providers see more trades per unit of capital, and traders can execute orders without watching the gas meter tick up to $20‑$30 per transaction. In August 2025 the average gas cost per swap on Arbitrum hovered around $0.03, a stark contrast to the $5‑$10 fees that still appear on Ethereum during peak demand.
Core mechanics of Uniswap v2 on Arbitrum
Uniswap v2 relies on the classic constant‑product formula (x·y = k). When you add liquidity to a pool, you deposit equal values of two ERC‑20 tokens. The platform then automatically adjusts prices based on the ratio of assets in the pool.
Key attributes:
- Fee tiers: 0.01% for very stable pairs, 0.05% for stable pairs, 0.3% for most pairs, and 1% for exotic or low‑liquidity pairs.
- Liquidity depth: On Arbitrum the WETH/USDC pool routinely holds over $300million in TVL, making slippage negligible for trades under $100,000.
- Routing: The interface aggregates routes across all supported chains, but when you select the Arbitrum network the router only pulls pools that live on that L2, guaranteeing the low‑fee advantage.
All trades are settled by the Ethereum the base layer that Secures Arbitrum’s rollup proofs, so the security guarantees remain the same as on mainnet, while the execution happens in the cheaper Arbitrum environment.
Step‑by‑step: swapping on Uniswap v2 (Arbitrum)
- Connect a compatible wallet (MetaMask, Coinbase Wallet, Rainbow, etc.). The DEX reads your token balances directly from the wallet.
- Select "Arbitrum" as the network. Your wallet will prompt a one‑time network switch if it isn’t already on Arbitrum.
- Choose the token pair you want to trade. If the pool exists, the UI shows the current price, available liquidity, and estimated gas cost.
- Enter the amount you wish to swap. The platform instantly displays the expected output, slippage tolerance, and the fee tier that will apply.
- Approve the token (if required). This is a single‑transaction approval that lets the router move the token on your behalf.
- Confirm the swap. MetaMask pops up with a transaction summary, including the gas price (usually a few cents on Arbitrum). Sign and wait-most swaps confirm in under 3seconds.
- Transaction receipt appears in the UI, and your new token balance updates automatically.
The entire flow feels like swapping a token on a centralized exchange, except you keep custody of your assets the whole way.
Uniswap v2 vs. v3 on Arbitrum - quick comparison
| Feature | Uniswap v2 | Uniswap v3 |
|---|---|---|
| Liquidity model | Uniform liquidity across the price range | Concentrated liquidity (LPs choose price bands) |
| Fee tiers | Four static tiers (0.01%, 0.05%, 0.3%, 1%) | Customizable per‑pool tiers (0.05%‑1%) |
| Capital efficiency | Lower - LPs need more capital to achieve same depth | Higher - LPs can concentrate capital, often 3‑6× depth |
| Complexity for traders | Very simple, one‑click swaps | Similar UI, but advanced LP options behind the scenes |
| Typical TVL (Arbitrum, Aug2025) | ≈ $1.2B | ≈ $1.5B |
| Gas cost per swap (USD) | ≈ $0.03 | ≈ $0.03 (identical on L2) |
If you’re a casual trader, v2’s simplicity is appealing. Liquidity providers looking to squeeze more yield usually gravitate toward v3 because concentrated positions can generate higher fees on the same amount of capital.
Security and audit pedigree
Both v2 and v3 contracts have undergone multiple third‑party audits (OpenZeppelin, ConsenSys Diligence) and have been battle‑tested on Ethereum since 2018. Deploying on Arbitrum does not alter the contract code; it merely adds a bridge layer that inherits Ethereum’s security model. The primary risk on Arbitrum relates to bridge reliability, but the Arbitrum SDK includes fraud proofs that can revert invalid state roots within a week, giving users a safety net.
Pros and cons of using Uniswap v2 on Arbitrum
- Pros
- Ultra‑low gas fees (cents versus dollars on mainnet).
- Deep liquidity for major pairs (WETH/USDC, WETH/USDT, wBTC/WETH).
- Simple UI-ideal for beginners and one‑click swaps.
- Same security guarantees as Ethereum because the rollup posts proofs to the main chain.
- Cons
- Less capital efficiency than v3 - LPs earn lower APRs for the same amount of capital.
- Occasional price‑feed delays when fiat price data loads from off‑chain APIs.
- Limited native support for custom fee tiers beyond the four defaults.
How Uniswap v2 stacks up against other Arbitrum DEXes
TraderJoe, SushiSwap and Curve also run on Arbitrum. In terms of daily volume, Uniswap v2 holds roughly 35% of the L2 DEX market, while TraderJoe trails at about 20% and SushiSwap near 15% (data from Dune Analytics, July2025). The edge comes from Uniswap’s brand recognition, the sheer number of pools, and the fact that many token projects launch their first liquidity on Uniswap before branching out.
Tips for getting the most out of Uniswap v2 on Arbitrum
- Set a slippage tolerance of 0.5% for stable pairs; for volatile pairs, 1‑2% prevents failed transactions.
- Take advantage of the “gas‑free” bridge promotion that runs quarterly - it refunds up to $5 of gas for first‑time bridge users.
- Monitor the TVL Total Value Locked, a key health metric for each pool on analytics dashboards; pools with rapidly rising TVL often indicate new project hype.
- Keep your wallet’s network settings updated; an outdated Arbitrum RPC can cause transaction timeouts.
Future outlook for Uniswap on Arbitrum
The upcoming Arbitrum Stylus a virtual machine upgrade that supports Rust and C++ contracts promises to broaden the developer base. Uniswap has hinted at integrating Stark‑style proof aggregation to further reduce L2 gas, which could push per‑swap costs below $0.01. Meanwhile, the ARB token’s governance model will keep community voting on fee rebates and incentive programs, meaning the ecosystem can stay responsive to market pressure.
Bottom line
Uniswap v2 on Arbitrum delivers what most traders care about: cheap, fast swaps with deep liquidity and a familiar interface. While v3 offers more sophisticated capital efficiency, v2 remains the go‑to choice for users who value simplicity and want to avoid the learning curve of concentrated liquidity. If you’re already on Arbitrum or planning to migrate, give Uniswap v2 a spin - the cost savings alone make it a compelling part of any DeFi toolbox.
Frequently Asked Questions
Does Uniswap v2 on Arbitrum require me to lock my funds?
No. Swaps are atomic - the moment you sign the transaction, the router pulls the exact amount of input tokens, executes the trade, and sends the output tokens back to your wallet. Funds are never held by a custodian.
How do I add liquidity to a Uniswap v2 pool on Arbitrum?
Go to the "Pool" tab, click "Add Liquidity", select the token pair, enter the amounts (the UI will auto‑balance them), approve each token, and confirm the transaction. Your LP tokens will appear in your wallet and you’ll start earning a share of the 0.3% (or applicable tier) fees.
Is the price feed on Uniswap v2 reliable?
The on‑chain price is derived from the pool’s token reserves, which is always accurate for the moment of execution. However, the fiat‑price overlay (USD value) relies on off‑chain oracles and can lag by a few seconds during high volatility.
Can I use Uniswap v2 on Arbitrum with a hardware wallet?
Yes. Ledger and Trezor integrate with MetaMask, which in turn can connect to Arbitrum. You’ll approve the transaction on the device, keeping the private key offline.
What’s the biggest risk when using Uniswap v2 on Arbitrum?
The primary risk is smart‑contract risk - if a pool’s contract is exploited, funds can be drained. Stick to well‑audited pools, check the TVL, and avoid obscure tokens with low liquidity.
Comments
It is incumbent upon us to scrutinize the environmental ramifications of transaction fees, even on ostensibly "cheap" L2 solutions. The notion that we can ignore the cumulative impact of thousands of micro‑transactions is morally untenable. While Uniswap v2 on Arbitrum boasts a $0.03 fee, teh aggregate demand may still strain network resources. Users should adopt a conscientious stance and prioritize sustainability over mere cost savings. A thoughtful approach will defiantly elevate the crypto ecosystem.
From an inclusive perspective, the reduction in gas costs on Arbitrum is a welcome development for newcomers. Lower barriers facilitate broader participation without compromising security. It remains essential, however, to educate users about slippage and fee tiers. By fostering understanding, we collectively strengthen the ecosystem.
Uniswap v2 on Arbitrum detonates a paradigm shift in decentralized exchange dynamics. The gas fee whisper of $0.03 masquerades as a trivial figure but conceals a cascade of liquidity migration. Traders surge into the platform seeking arbitrage opportunities while the protocol's constant product formula silently balances the order books. Slippage tolerance becomes a razor‑edge where fortunes are forged or fractured. The fee tiers-0.01% to 1%-craft a stratified battlefield for stablecoins versus exotic assets. Each swap echoes through the network's state channels igniting subtle protocol incentives. Meanwhile, the underlying rollup architecture abstracts away the latency of Ethereum's mainnet. Users revel in near‑instant confirmations yet remain oblivious to the sequencer's pivotal role. The arbitrage bots deploy sophisticated algorithms capitalizing on minuscule price differentials across pools. This catapults the volume throughput into uncharted territories demanding robust gas optimization. Developers must monitor the gas meter relentlessly lest they incur hidden costs despite the nominal fee. The community's governance proposals now orbit around fee redistribution mechanisms that could reshape incentive structures. In this volatile arena, risk management is not optional but a survival imperative. Ultimately, the $0.03 fee is a veneer; the true cost resides in strategic positioning and capital efficiency. As the ecosystem evolves, participants must adapt or be eclipsed by more agile actors.
Wow, another “game‑changing” L2 solution-just what the United States needed to dominate the blockchain frontier!!!! 🤖 The $0.03 fee is practically a gift from our great nation’s ingenuity!!!! Yet, everyone pretends it’s a “global” breakthrough while ignoring the fact that true decentralization thrives on American hardware and talent!!!! #MadeInUSA 😎
Sure, because a few cents really revolutionizes everything.
In the grand theater of DeFi the spotlight loves cheap fees yet the actors stumble in the dark – a poetic irony that pokes fun at our relentless pursuit of marginal gains.
Absolutely, and let’s remember that education doesn’t stop at the fee calculator. Providing clear guides on how slippage works can empower even the most hesitant users. Together we can make the low‑cost promise truly accessible.
Think of each swap as a tiny adventure – the $0.03 fee is the ticket, the token pair the destination, and your patience the compass. Stay focused and you’ll navigate the Arbitrum seas with confidence!
The fee calculator is a handy tool, but don’t let the numbers blind you. Understanding the underlying pair dynamics helps you avoid unexpected slippage. Take a moment to compare stable versus exotic pools – you might discover a better route that saves a few extra cents. It’s all about making informed choices, even if a typo slips in here.
While the $0.03 gas fee on Arbitrum appears minuscule, it’s crucial to recognize that this figure is a product of sophisticated roll‑up engineering and efficient transaction batching. In practice, users still need to account for potential delays caused by sequencer congestion, which can subtly affect execution timing. So, enjoy the savings, but keep an eye on the network’s health.
Love seeing those savings! 🎉 Swapping on Arbitrum feels breezy and the low fees keep the vibes high. Keep exploring those pools and happy trading! 🚀
Look, no foreign tech can match the raw power of American blockchain pioneers – those “sophisticated roll‑up” claims are just marketing fluff. We’ll keep the fees low because we own the infrastructure, not some overseas consortium.
The discourse surrounding fee optimization reveals a stark intellectual divide; the discerning elite recognize the superficiality of such cost‑centred narratives and instead focus on systemic value creation.
One might contemplate whether the emphasis on transactional frugality distracts from deeper considerations of network decentralization and long‑term resilience.
The data clearly shows that Arbitrum’s fee structure outperforms Ethereum’s during peak hours, resulting in a consistent 95% reduction in user‑paid gas. However, be wary of the occasional sequencer lag which can temporarily inflate effective costs.
Listen up: the economics of Uniswap v2 on Arbitrum are not just a numbers game, they are a strategic battlefield where capital efficiency decides winners and losers. Master the fee tiers, exploit the low‑gas environment, and you’ll dominate the liquidity arena. Anything less is complacency masked as casual trading. The protocol rewards the bold, so seize the advantage now.
Honestly, if you’re still chasing cheap swaps without caring about security, you’re missing the bigger picture.
Exactly, push past the cheap‑fee hype and prioritize robust risk management – that’s the real path to sustainable gains.
Contemplating the long‑term implications of L2 fee reductions invites a nuanced dialogue about scalability versus decentralization.
What they don’t tell you is that the “low fee” narrative is a front for data harvesting by hidden entities controlling the sequencer, steering the market to their advantage while the average user stays oblivious.
In light of these observations, it would be valuable to further analyze how fee structures influence trader behavior across different token pairs, especially considering varying volatility regimes.