In this track: Digital value and units
Read a very large integer
Use groups and units to make long numbers legible without changing them.
A phone number becomes easier to check when grouped, but removing one digit still changes the number. Large balances need the same care.
1 ETH = 1000000000 Gwei = 1000000000000000000 Wei.
Separate formatting from value
The strings 1000000000 and 1,000,000,000 can describe the same integer when the comma is a display separator. A machine input format may reject separators, so follow the tool’s instructions rather than assuming every formatted string is accepted.
Count digits before guessing
A positive integer with nineteen digits is at least 10¹⁸. In Wei, that scale is at least one ETH. This gives a quick magnitude check, but it is not a substitute for reading the complete number or knowing its unit.
Scientific notation needs context
The display 1e18 means 1 × 10¹⁸. Some software can parse that expression, but our exact decimal converter intentionally requires ordinary decimal input. The letter e in an address, by contrast, is a hexadecimal digit, not an exponent marker.
Use a round-trip check
Copy the original integer into the converter as Wei. Read its ETH value, then convert the result back. Keep the exact integer when exporting or sharing a calculation; abbreviated labels such as 1.2K are for previews only.
Does a long number tell you its unit by itself?
The same integer can be a token amount, Wei, an identifier or another quantity.
Original explanations by EtherTools. Examples are educational and source-linked; this site is independent of the Ethereum Foundation. Our approach.