Unexpectedly large IL
verify that the new price uses the same quote convention as the initial price.
Impermanent Loss Calculator
Model how a price-ratio change may affect a liquidity-provider position, then compare the estimated LP value with holding the original tokens.
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An impermanent loss calculator estimates how an automated market maker may rebalance a two-token LP position when the token price ratio changes. This page compares estimated LP value with HODL value and can include user-entered fees and farming rewards; its presets are examples, not live market data.
1Enter Position
2Simulate Price Change
3Review IL & ROI
Calculate Impermanent Loss
ETH
USDC
$20,000.00
USDC
USDC
-20%
USDC
USDC
%
Calculations happen instantly in your browser. Estimates are for planning and education, not financial advice.
Impermanent Loss Result
Impermanent Loss
-0.62%
-$111.4562
LP Position Value
$17,888.54
before fees
HODL Value
$18,000.00
same tokens held
Token PairETH / USDC
AMM / Pool TypeUniswap V2 (Constant Product)
Price Change1,600 USDC per ETH · -20%
Price Ratio0.8x
Value if HODL$18,000.00
Value in LP (no fees)$17,888.54
Impermanent Loss-$111.4562 (-0.62%)
Fees Earned$250.00
Farming Rewards$100.00
Pool APR Reference15%
Net PnL vs HODL$238.54
Final ROI vs HODL1.19%
Scenario Breakdown
Price ratio (new / initial)
Impermanent loss is symmetrical around 1x for constant-product pools. Alternative pool models are shown as approximations.
Common Pool Presets
Click a preset to auto-fill the calculator with editable sample values.
How to use it
Enter the source data: Enter both token amounts, the initial price and a new simulated price. Add fee income or farming rewards only when you have a defensible estimate for the same period.
Choose the relevant settings: Choose the relevant AMM/pool option, or load a preset and replace every sample value. Decide whether the calculator should rebalance token amounts and include income in ROI.
Review and verify the result: Compare impermanent loss, LP value and HODL value first. Then inspect net PnL and ROI, test several ratios, and copy or export the assumptions with the result.
Key capabilities
- Compares estimated LP value with the value of holding the original token amounts.
- Shows impermanent loss as both a percentage and a value difference.
- Adds editable trading-fee and farming-reward assumptions to the scenario.
- Provides price-change scenarios and editable pool presets.
- Copies the result or exports the calculation as JSON.
Best use cases
- Screen LP risk before adding liquidity.
- Stress-test an existing position under several price-ratio changes.
- Estimate whether fees and incentives may offset IL under stated assumptions.
Limits and safety notes
- Impermanent loss is relative to HODL, not necessarily a cash loss. Fees and rewards are uncertain inputs. A return to the entry ratio removes constant-product IL in the simplified model, but real positions may still be affected by fees, range exposure, execution and protocol rules.
- The core transformation runs in the current browser component. Browser extensions, clipboard history, downloaded files and site-wide diagnostics remain separate exposure points, so never enter production secrets unless you have reviewed the complete environment.
Troubleshooting
ROI looks too high
remove preset fees, rewards and APR values, then enter assumptions for the same time period.
Concentrated-liquidity position
do not use the constant-product result as a range-position valuation.
Frequently asked questions
How is impermanent loss calculated?
For a standard 50/50 constant-product pool, the simplified IL percentage is derived from the new-to-initial price ratio and compares the rebalanced LP value with HODL. Each selectable mode is labeled as a constant-product calculation or a dampened approximation; it is not a protocol-specific valuation.
Does this calculator support concentrated liquidity?
The main calculation is a constant-product estimate. A concentrated-liquidity position can stop earning fees and change exposure when price moves outside its active range, so it needs a range-aware model.
Is the calculator using live DeFi data?
Treat token prices, APR, fees, rewards and presets as editable static assumptions unless the interface shows a verified source and timestamp.
Is it safe and private?
The calculation runs in this browser component, but that alone is not a complete privacy guarantee. Use non-production data unless you have also reviewed extensions, clipboard history, downloads and site diagnostics.
Does it work on mobile?
The layout adapts to narrow screens. File selection, camera access, clipboard actions and downloads still depend on the permissions and capabilities of the mobile browser.
Related tools
Use the tool
Enter one conservative, one base and one adverse price scenario. Save the assumptions with the result so another person can reproduce the comparison.