Uniswap V2-style IL for a 50/50 pool, with optional fee offset.
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PRO
Guide & Information
How to Calculate Impermanent Loss
01Enter price moveEnter a price multiplier: 2 means the token price doubled, 0.5 means it halved. The tool calculates IL using the Uniswap V2 constant-product formula: IL = (2√r)/(1+r) − 1, where r is the price ratio. For example, r=2 gives IL ≈ −5.72%, meaning your LP position is worth 5.72% less than if you had simply held both tokens.
02Set position sizeEnter the initial USD value of your LP position (e.g. $10,000). This lets the tool express IL in both percentage and dollar terms so you can see the actual capital impact. At r=2, a $10,000 position suffers ~$572 in impermanent loss relative to HODL.
03Add fee offset (optional)If you know or estimate the trading fees earned as a percentage of initial value, enter them here. The tool shows net effect by subtracting IL from fee income to determine if your LP position outperformed HODL. For example: 8% fee income − 5.72% IL = +2.28% net gain vs HODL.
Privacy & Security
This tool runs locally in your browser. No wallet connections. No signing. No data leaves your device.
About Impermanent Loss
Impermanent loss (IL) measures the difference between providing liquidity in a 50/50 AMM pool and simply holding the same tokens in a wallet. When token prices diverge, the constant-product formula rebalances your ratio, resulting in a value lower than HODL. This calculator uses the classic Uniswap V2 formula: IL = (2√r)/(1+r) − 1, where r is the price ratio (new price / initial price). At r=2 (price doubled), IL ≈ −5.72%. At r=0.5 (price halved), IL ≈ −5.72%. The loss is symmetric — it depends only on the magnitude of price change, not the direction. An optional fee offset lets you subtract estimated trading fee income to find the net effect on your LP position vs HODL.
When to use it
Use this before depositing into a Uniswap V2-style pool to understand how much price divergence you can tolerate before fees stop compensating for IL. Also useful after exiting a position to evaluate whether your fee earnings offset the IL you incurred. Compare IL at different price multiples to find the 'break-even' point where fees ≥ IL.
Tips & Tricks
•IL is relative to HODL, not an absolute loss vs USD — you can still profit in dollar terms if the overall market rises.
•Fee offset is an approximation: actual fees depend on your share of pool liquidity, trading volume, and fee tier (0.01%, 0.05%, 0.3%, 1%).
•At 2x price move, IL ≈ 5.72% — the most commonly cited benchmark. At 5x, IL ≈ 25.5%. At 10x, IL ≈ 42.5%.
•Concentrated liquidity (Uniswap V3) has significantly higher IL than 50/50 pools for the same price range because capital is deployed across a narrower band.
•Correlated assets (e.g. stETH/ETH) experience minimal IL because their prices move together, while uncorrelated pairs (ETH/DOGE) see much larger IL.
Price multiplier (r)
r=2 means token price doubled vs the other side.
Initial LP value (USD)
Fee offset (% of initial)
Optional approximation to compare IL vs fees.
Results
Impermanent Loss (V2 50/50)
-5.72%
Relative to HODL.
IL in USD (vs HODL)
-$57.19
Given initial $1000.00.
Fee offset
0.00%
Net (IL + fees)
-5.72%
Approx: -$57.19.
This tool is informational and does not provide financial advice.