What is the Uniswap V2 constant product formula ?

x * y = k, where x and y are reserves. Swaps adjust while preserving k, with 0.3% fee baked into effective input.

How does price impact work in Uniswap V2 swaps?

Large inputs shift reserve ratio, making marginal output pricier—pure math, worsens with size.

Exact input: control spend, accept variable get. Exact output: nail receipt, flex spend. Pick per risk tolerance.

Uniswap V2 swaps aren't fairy dust. They're cold math enforcing trades, skimming fees, and slapping you with slippage on big orders.

theAIcatchup Apr 10, 2026 4 min read

Uniswap V2 swaps enforce constant product via getAmountOut, hiding 0.3% fees in the pool's growth. 𝕏
Price impact from large trades is math inevitability, not extra charge—diminishing returns hit hard. 𝕏
Router variants handle ETH and fee tokens, but core logic stays ruthlessly simple. 𝕏

Published by

Ship faster. Build smarter.

#AMM swap #AMM swaps #DeFi liquidity #DeFi mechanics #Uniswap V2 #constant product #constant product formula

Get the best Developer Tools stories of the week in your inbox — no noise, no spam.

Originally reported by dev.to