What is Wrapped Ether (WETH)?

Quick Facts

  • Token: Wrapped Ether (WETH)
  • Pegged to: ETH at a strict 1:1 ratio
  • Token standard: ERC-20
  • Created: 2017 by contributors from MakerDAO, Dharma, and Kyber Network
  • Primary use: DeFi protocols, DEX trading, and liquidity pools
  • Mechanism: Mint by depositing ETH; burn to redeem ETH
  • Multi-chain: Available on Ethereum, Polygon, Arbitrum, Base, and more

Introduction

Wrapped Ether (WETH) is an ERC-20 compatible token that represents Ethereum's native currency, ETH, at a 1:1 ratio. It was designed to bridge a fundamental technical gap — ETH predates the ERC-20 standard and cannot natively interact with the vast majority of decentralized applications that rely on it.

By converting ETH into WETH, users gain seamless access to the full range of DeFi protocols, decentralized exchanges (DEXs), and smart contract-based services without leaving the Ethereum ecosystem.

History & Background

When the ERC-20 standard became the backbone of Ethereum's token ecosystem, a problem emerged: ETH itself was not ERC-20 compliant, since it was created before the standard existed. This incompatibility created friction for developers building DeFi applications.

In 2017, contributors from projects including MakerDAO, Dharma, and Kyber Network collaborated to create WETH, providing a standardized, trustless solution for wrapping ETH into a DeFi-ready format.

How Wrapped Ether Works

The wrapping process is straightforward and fully on-chain:

  1. A user sends ETH to the WETH smart contract.
  2. The contract locks the ETH and mints an equivalent amount of WETH.
  3. The user can use WETH freely across DeFi applications.
  4. To unwrap, the user sends WETH back to the contract, which burns it and releases the original ETH.

The mechanism guarantees that for every WETH token in circulation, exactly one ETH is held in reserve by the smart contract. This transparent peg is verifiable on-chain at all times.

Tokenomics

WETH has no fixed issuance schedule or inflation model. Its supply is entirely demand-driven: every WETH token is backed by one ETH locked in the contract. When ETH is deposited, WETH is minted; when WETH is returned, it is burned and ETH is released. This elastic model ensures WETH always reflects real ETH demand within DeFi.

Circulating supply ? 2.66 million WETH
Reserved supply ? 0 WETH
Burned
0x0000000000000000000000000000000000000001
0 WETH
Total supply ? 2.66 million WETH
Max supply ? 2.70 million WETH
Updated 7d ago

Ecosystem & Use Cases

WETH is deeply embedded in the Ethereum DeFi ecosystem:

  • DEX trading: WETH serves as a common base pair on platforms like Uniswap, SushiSwap, and Balancer.
  • Liquidity pools: Providers deposit WETH alongside other ERC-20 tokens to earn fees.
  • Lending protocols: WETH can be supplied or borrowed on money markets like Aave and Compound.
  • NFT marketplaces: Platforms like OpenSea use WETH to enable automated bids.
  • Multi-chain DeFi: WETH exists across Layer-2 networks and sidechains, extending ETH's utility far beyond mainnet.

Team, Governance & Community

WETH is a community-owned, open-source protocol with no central team or governance body. The original WETH contract was collaboratively developed by members of the early Ethereum developer community. Because the contract is immutable and trustless, no single entity controls it. Governance decisions are informal and driven by community consensus across the broader Ethereum developer ecosystem.

Advantages

  • ERC-20 compatibility unlocks access to the entire DeFi ecosystem for ETH holders.
  • Trustless and transparent — the smart contract is open-source and verifiable.
  • 1:1 peg ensures WETH always holds the same value as ETH, with no price risk from the wrap itself.
  • Multi-chain availability extends ETH utility to Layer-2 networks and alternative chains.
  • Widely integrated — most major DeFi protocols support or use WETH internally.

Risks & Challenges

  • Smart contract risk: Although the WETH contract is battle-tested, any smart contract carries inherent vulnerability risk.
  • Gas costs: Wrapping and unwrapping ETH requires on-chain transactions, each incurring gas fees.
  • Redundancy: Many modern DeFi interfaces wrap ETH automatically behind the scenes, which can make manual WETH management feel unnecessary.
  • Fragmentation: WETH exists in different forms across chains; users must ensure they use the correct version for each network.

Long-Term Vision

WETH remains a foundational primitive of the Ethereum DeFi stack. As Ethereum continues to scale via Layer-2 solutions and cross-chain infrastructure matures, WETH's role as a universal, ERC-20-compliant representation of ETH is expected to remain central. Discussions within the Ethereum community about a potential native ERC-20 upgrade to ETH itself exist, but until such a change is implemented at the protocol level, WETH continues to serve as the essential bridge between native ETH and the broader decentralized application ecosystem.

Frequently Asked Questions

ETH is Ethereum's native currency and predates the ERC-20 standard, meaning it cannot directly interact with many DeFi applications. WETH is an ERC-20 token that represents ETH at a 1:1 ratio, making it compatible with the full range of decentralized protocols.

Yes. WETH is pegged 1:1 to ETH, and every WETH token is backed by one ETH locked in the smart contract. There is no independent price risk from holding WETH versus ETH.

You send ETH to the WETH smart contract, which locks your ETH and mints an equivalent amount of WETH to your wallet. Most DeFi platforms and wallets offer a simple wrap or unwrap interface.

Yes. The process is called unwrapping. You send WETH back to the smart contract, which burns those tokens and releases the equivalent ETH from its locked reserves.

ERC-20 defines a unified interface for tokens, and most smart contracts are built to handle only ERC-20 tokens. Supporting both native ETH and ERC-20 tokens would require complex additional logic, so protocols standardize on WETH.

Yes. WETH exists on multiple networks including Polygon, Arbitrum, Base, Optimism, BNB Smart Chain, and others, enabling ETH-equivalent liquidity across the multi-chain DeFi landscape.

WETH was created in 2017 by developers from MakerDAO, Dharma, and Kyber Network. The contract is open-source, immutable, and has no central controlling entity — it is governed by the broader Ethereum community.

Yes. Gas fees on Ethereum must always be paid in native ETH, even when transacting with WETH. Wrapping and unwrapping operations are on-chain transactions and each incur their own gas cost.