Layer 2 Fee Comparison Calculator
Compare transaction fees across Arbitrum, Optimism, Base, zkSync, and Polygon. Enter values for instant results with step-by-step formulas.
Reviewed by Daniel Agrici, Founder & Lead Developer
Formula
L2 Cost = L2 Execution Cost + L1 Data Posting Cost
Layer 2 transaction costs have two components: the L2 execution fee for processing on the rollup, and the L1 data posting fee for submitting compressed transaction data or proofs to Ethereum mainnet. The ratio between these components varies by L2 type and network conditions.
Worked Examples
Example 1: Active DeFi Trader
Problem:A trader executes 20 swaps per day. ETH price is $3,500 and L1 gas is 30 gwei. Compare annual costs across Layer 2s vs Ethereum mainnet.
Solution:L1 swap gas: 180,000 units x 30 gwei = 5,400,000 gwei = 0.0054 ETH = $18.90\nL1 daily: 20 x $18.90 = $378/day = $137,970/year\nArbitrum: ~$0.30/swap x 20 = $6/day = $2,190/year\nBase: ~$0.24/swap x 20 = $4.80/day = $1,752/year\nPolygon: ~$0.004/swap x 20 = $0.08/day = $29.20/year
Result:L1: $137,970/year | Base: $1,752/year | Polygon PoS: $29/year | Savings: up to 99.98%
Example 2: NFT Creator Minting Collection
Problem:Minting 1,000 NFTs with 150,000 gas units each at 30 gwei L1 gas and $3,500 ETH. Compare batch minting costs.
Solution:L1 per mint: 150,000 x 30 gwei = 0.0045 ETH = $15.75\nL1 total: 1,000 x $15.75 = $15,750\nArbitrum total: ~1,000 x $0.25 = $250\nzkSync total: ~1,000 x $0.19 = $190\nPolygon total: ~1,000 x $0.003 = $3
Result:L1: $15,750 | Arbitrum: $250 | zkSync: $190 | Polygon: $3 | Up to 99.98% savings
Frequently Asked Questions
What are Layer 2 solutions and why do they exist?
Layer 2 solutions are scaling technologies built on top of Ethereum (Layer 1) that process transactions off the main chain while inheriting its security guarantees. They exist because Ethereum mainnet can only handle about 15-30 transactions per second, causing congestion and high gas fees during peak demand. Layer 2s batch hundreds or thousands of transactions together and submit compressed proofs to Ethereum, dramatically reducing the per-transaction cost. The three main types are optimistic rollups (Arbitrum, Optimism, Base), ZK rollups (zkSync, StarkNet, Scroll), and sidechains (Polygon PoS). Each offers different trade-offs between cost, speed, security, and compatibility with existing Ethereum tools and contracts.
Why are fees on Polygon PoS so much lower than other Layer 2s?
Polygon PoS is technically a sidechain rather than a true Layer 2 rollup, which fundamentally changes its fee dynamics. Unlike rollups that must post transaction data or proofs back to Ethereum mainnet, Polygon PoS operates its own independent validator set and consensus mechanism. This means it has zero L1 data posting costs, making transactions extremely cheap at fractions of a cent. The trade-off is security: Polygon PoS does not inherit Ethereum full security guarantees. If Polygon validators collude, they could theoretically steal funds, whereas on true rollups, Ethereum mainnet enforces the final state. For small transactions where speed and cost matter more than maximum security, Polygon PoS offers compelling value.
What is EIP-4844 and how does it affect Layer 2 fees?
EIP-4844, also known as Proto-Danksharding or the Dencun upgrade, introduced a new transaction type called blob transactions specifically designed to reduce Layer 2 data posting costs. Before EIP-4844, Layer 2s had to post their data as regular calldata on Ethereum, competing with all other transactions for block space. Blob transactions create a separate, cheaper data availability layer with its own fee market. The impact has been dramatic: Layer 2 transaction fees dropped by 90-99% after the upgrade went live. For example, a simple transfer on Arbitrum went from roughly $0.15 to $0.01 or less. This upgrade was a major milestone in Ethereum scaling roadmap, making Layer 2s competitive with alternative Layer 1 blockchains on cost.
How do I choose the right Layer 2 for my needs?
Choosing the right Layer 2 depends on your specific use case and priorities. For DeFi trading and complex interactions, Arbitrum has the largest ecosystem with the most protocols and deepest liquidity. For NFTs and social applications, Base (backed by Coinbase) is growing rapidly with strong consumer-facing dApps. For maximum decentralization and Ethereum alignment, Optimism with its OP Stack offers strong governance and retroactive public goods funding. For privacy-focused or enterprise applications, zkSync Era offers the benefits of zero-knowledge proofs. For ultra-cheap transactions where maximum security is not critical, Polygon PoS remains unbeatable on cost. Always consider bridge availability, withdrawal times, and the specific dApps you want to use.
References
Reviewed by Daniel Agrici, Founder & Lead Developer · Editorial policy