Wei

The smallest atomic unit.

1 Ether = 10¹⁸ Wei. Gas costs returned by eth_gasPrice are in Wei as hex. Converting the raw hex gives you the exact Wei amount without rounding.

Live example0x3B9ACA00 → 1,000,000,000 Wei

Gwei

The gas price standard.

EIP-1559 base fees come back as hex integers in Wei. Divide by 10⁹ to get the Gwei figure you see on gas trackers. Our tool does this instantly alongside the raw decimal.

Live example0x174876E800 → 100 Gwei

Ether

The account balance unit.

eth_getBalance returns hex Wei. Divide by 10¹⁸ to get the ETH figure a wallet shows the user. Our Ether output handles this conversion precisely using BigInt.

Live example0xDE0B6B3A7640000 → 1 ETH

Why Ethereum chose hexadecimal.

JSON transport

JSON has no native 256-bit integer type. Ethereum represents all integers as "0x..." hex strings so they can be transmitted precisely over HTTP without floating-point loss.

Compact encoding

One hex digit = 4 bits = one nibble. A 32-byte hash (256 bits) becomes 64 hex characters. Binary would require 256 characters; decimal would be an unwieldy 78-digit number.

EVM alignment

The Ethereum Virtual Machine (EVM) operates on 32-byte (256-bit) words. Hex maps directly to these words — one 64-char hex string, one EVM word.

Common RPC hex fields.

RPC Method	Hex Field	Meaning	Unit
eth_blockNumber	result	Current block height	block number
eth_getBalance	result	Account ETH balance	Wei
eth_gasPrice	result	Current gas price	Wei
eth_maxFeePerGas	result	EIP-1559 max fee	Wei
eth_getTransactionByHash	value	ETH transferred	Wei
eth_getTransactionByHash	gas	Gas limit	gas units
eth_getTransactionByHash	nonce	Sender tx count	count
eth_getTransactionReceipt	gasUsed	Gas actually used	gas units

Why Ethereum uses hex — and what Wei, Gwei, and Ether mean.