Dex Swap Fee Calculator
Calculate total swap costs on Uniswap, SushiSwap, and PancakeSwap including slippage and gas. Enter values for instant results with step-by-step formulas.
Formula
Total Cost = Trading Fee + Slippage + Gas Cost + Price Impact
Trading fee is the LP fee percentage of trade amount. Slippage is the expected price movement tolerance. Gas cost equals gas units times gas price in gwei times 10^-9 times ETH price. Price impact depends on trade size relative to pool liquidity.
Worked Examples
Example 1: Standard Uniswap V3 ETH/USDC Swap
Problem: Swap $5,000 USDC to ETH on Uniswap V3 (0.30% tier), with 0.5% slippage tolerance, gas at 30 gwei, ETH at $3,000.
Solution: Trading fee = $5,000 * 0.30% = $15.00\nSlippage (expected) = $5,000 * 0.5% = $25.00\nGas cost = 150,000 * 30 gwei * 10^-9 * $3,000 = $13.50\nPrice impact (est.) = ~$0.50\nTotal cost = $15.00 + $25.00 + $13.50 + $0.50 = $54.00
Result: Total swap cost: ~$54.00 (1.08% of trade). You receive approximately $4,946 in ETH.
Example 2: Small Trade Gas Impact Analysis
Problem: Compare the effective cost rate for a $200 vs $10,000 swap on Uniswap V3 (0.30% tier) with gas at 25 gwei.
Solution: $200 trade:\nTrading fee: $0.60 | Gas: ~$11.25 | Total: ~$11.85 | Rate: 5.93%\n\n$10,000 trade:\nTrading fee: $30.00 | Gas: ~$11.25 | Total: ~$41.25 | Rate: 0.41%\n\nGas is fixed regardless of trade size.
Result: The $200 trade costs 5.93% in fees vs 0.41% for $10,000. Gas dominates small trades.
Frequently Asked Questions
What is slippage and how does it affect my swap cost?
Slippage is the difference between the expected price of a trade and the actual executed price. It occurs because prices can change between when you submit a transaction and when it is confirmed on the blockchain. In decentralized exchanges, slippage has two components: market slippage from natural price movement during confirmation time, and price impact from your trade itself changing the pool ratio. Setting a slippage tolerance protects you by reverting the transaction if the price moves beyond your threshold. A typical tolerance of 0.5 to 1 percent works for most trades, but volatile tokens or low-liquidity pools may require higher tolerances of 2 to 5 percent. Setting slippage too high exposes you to sandwich attacks by MEV bots.
Which Uniswap V3 fee tier should I use for my swap?
Uniswap V3 offers four fee tiers optimized for different asset types. The 0.01 percent tier is designed for stablecoin-to-stablecoin swaps like USDC to USDT where prices barely move. The 0.05 percent tier works well for correlated pairs like ETH to stETH or different wrapped Bitcoin versions. The 0.30 percent tier is the standard for most token pairs like ETH to USDC or popular ERC-20 tokens, offering deep liquidity and reasonable fees. The 1.0 percent tier exists for exotic or very volatile tokens where liquidity providers need higher compensation for impermanent loss risk. Always check which tier has the deepest liquidity for your specific pair, as routing through the highest-liquidity pool typically gives the best execution price.
How can I minimize total swap costs on DEXes?
Several strategies can significantly reduce your swap costs on decentralized exchanges. First, use DEX aggregators like 1inch, Paraswap, or CowSwap that automatically route your trade across multiple pools and protocols to find the best price including all fees. Second, trade during periods of low gas prices, typically weekends and late nights in US time zones, when Ethereum network congestion is lower. Third, consider Layer 2 networks where gas fees are dramatically lower. Fourth, for large trades, split them into smaller orders over time to reduce price impact. Fifth, use limit orders instead of market swaps when possible to avoid slippage entirely. Sixth, set appropriate slippage tolerance to prevent MEV sandwich attacks while avoiding failed transactions from setting it too low.
How accurate are the results from Dex Swap Fee Calculator?
All calculations use established mathematical formulas and are performed with high-precision arithmetic. Results are accurate to the precision shown. For critical decisions in finance, medicine, or engineering, always verify results with a qualified professional.
Can I use the results for professional or academic purposes?
You may use the results for reference and educational purposes. For professional reports, academic papers, or critical decisions, we recommend verifying outputs against peer-reviewed sources or consulting a qualified expert in the relevant field.
Can I use Dex Swap Fee Calculator on a mobile device?
Yes. All calculators on NovaCalculator are fully responsive and work on smartphones, tablets, and desktops. The layout adapts automatically to your screen size.