Free Impermanent Loss Calculator — Bear Toolbox
By Raycarl Lei · Last updated 2026-08-09
TL;DR. Free impermanent loss calculator for multi-chain liquidity pools. Plug in token prices or paste a supported pool address or DEX link — the tool computes IL from the constant-product formula IL = 2·√r / (1 + r) − 1, runs 50,000 Monte-Carlo paths by default, and shows LP return vs. HODL with Sharpe and net APR. No signup, no wallet connection.
What is impermanent loss?
Impermanent loss is the gap between holding two tokens in an AMM liquidity pool versus holding them in your wallet. When the price ratio shifts, the constant-product invariant x·y = k rebalances your position automatically, leaving you with less of the appreciating token. The closed-form result for a 50/50 pool is IL = 2·√r / (1 + r) − 1, where r is the new-to-old price ratio (full derivation: Peteris Erins, Auditless, 2020; original AMM model: Uniswap V2 whitepaper, Adams et al., 2020).
Impermanent loss at common price moves
| Price ratio change | Impermanent loss |
|---|---|
| 1.25× (one token up 25%) | ~0.6% |
| 1.5× | ~2.0% |
| 2× | ~5.7% |
| 3× | ~13.4% |
| 5× | ~25.5% |
| 10× | ~42.5% |
Real LP returns also include fees and incentives, which can offset IL. The calculator's "net APR" view subtracts IL drag from realized fee yield so you see the actual outcome vs. a HODL baseline, not just the IL number in isolation.
How is this different from other free IL calculators?
Most free tools (DailyDeFi, CoinGecko, MyCalcul, MiniWebTool) take two prices and return one IL number. TraderBear's toolbox adds:
- Multi-chain live pool inspector — paste a supported pool address or DEX link; the tool auto-detects the chain, DEX, and version.
- Monte-Carlo simulator — 50,000 stochastic price paths by default around your projected move, so you see the IL distribution, not a single point estimate.
- LP-vs-HODL with Sharpe + net APR — compare risk-adjusted fee yield against pure holding, the metric that actually decides whether the pool is worth it.
- Browser-based calculations — no wallet connect and no signup; public pool lookup requests public market data.
Does this work for Uniswap V3?
The base 2·√r / (1 + r) − 1 formula applies to V2-style constant-product pools (Uniswap V2, Raydium standard, Orca standard, most Solana AMMs). For Uniswap V3 concentrated liquidity, IL is amplified by the leverage factor implied by your range — the Monte-Carlo simulator estimates net outcomes across price paths so you can compare V3 ranges side-by-side instead of trusting a single closed-form approximation.
FAQ
Is it really free?
Yes. No signup or wallet connection is required. Calculation inputs and simulations run in your browser.
Do you store my pool addresses or prices?
Calculation inputs and simulations run in your browser. When you load a public pool address or DEX link, the page requests public pool information from market-data providers.
Which chains and DEXs work?
The live inspector auto-detects the chain, DEX, and version for supported pool addresses and DEX links. The Express formula itself works for any standard 50/50 constant-product AMM scenario.
Keep learning
- Impermanent loss across Solana AMMs — Raydium, Orca & Meteora
- Raydium impermanent loss — CPMM vs CLMM pools
- Orca impermanent loss (divergence loss) in Whirlpools
- Uniswap V2 vs V3 impermanent loss
- How to reduce impermanent loss — five approaches compared
- All TraderBear Learn articles
Risk disclaimer. This tool is for educational and research purposes only. Liquidity provision involves the risk of impermanent loss, smart-contract risk, and total loss of capital. TraderBear is not a registered investment advisor; nothing here is financial advice. Verify the formula and inputs before making any allocation decision.