Unexpected zeros or rounding
switch to Wei or scientific notation and keep the unrounded value.
Ethereum Unit Converter
Convert one Ethereum denomination into the others and keep exact units separate from optional fiat estimates.
Crypto & SecurityDirect answer
The Ethereum unit converter maps values between Ether and its smaller denominations: 1 ETH equals 10^18 Wei, while 1 Gwei equals 10^9 Wei. Enter a value in one supported unit to update the others; any USD value depends on the ETH price you provide.
Convert Units
Quick Presets
All conversions happen instantly in your browser. Standard denominations use 1 ETH = 10^18 Wei.
Conversion Result
Live1.25 ETH = 1,250,000,000 gwei
| Unit | Symbol | Converted Value | |
|---|---|---|---|
| Wei | wei | 1,250,000,000,000,000,000 | |
| Kwei | kwei | 1,250,000,000,000,000 | |
| Mwei | mwei | 1,250,000,000,000 | |
| Gwei | gwei | 1,250,000,000 | |
| Szabo | szabo | 1,250,000 | |
| Finney | finney | 1,250 | |
| Ether | ETH | 1.25 |
Unit Reference
| Unit | Symbol | Wei Value | Common Use |
|---|---|---|---|
| Wei | wei | 10^0 | Smart contracts, lowest denomination |
| Kwei | kwei | 10^3 | Very small amounts |
| Mwei | mwei | 10^6 | Micro transactions |
| Gwei | gwei | 10^9 | Gas prices, fees, transactions |
| Szabo | szabo | 10^12 | Legacy unit, rarely used |
| Finney | finney | 10^15 | User-friendly small ETH values |
| Ether | ETH | 10^18 | Main cryptocurrency unit |
Gas Fee & Price Reference
Gwei
Estimated Fee0.000525 ETH
Approx. USD$1.70
Gas Speed Guide
SpeedGas PriceEst. TimeSlow12 Gwei5 - 10 minStandard25 Gwei1 - 3 minFast40 Gwei15 - 60 sec
ETH Price (USD)
$3,238.65
Editable reference price
Fees are estimates and may vary based on network congestion.
How to use it
Enter the source data: Enter a number in ETH, Wei, Gwei, Kwei, Mwei, Szabo or Finney.
Choose the relevant settings: Choose the source unit and review the automatically calculated values in every other denomination. Enter an ETH price only when a fiat reference is useful.
Review and verify the result: Copy one result, copy all denominations or export JSON. Preserve the unit label and scientific notation when values are very large or small.
Key capabilities
- Supports ETH, Wei, Gwei, Kwei, Mwei, Szabo and Finney.
- Updates all denomination equivalents from one input.
- Shows scientific notation for extreme values.
- Copies all results or exports JSON.
- Provides a secondary reference for gas-related units.
Best use cases
- Convert a wallet balance between ETH and Wei.
- Translate a Gwei gas price into base-unit values.
- Prepare exact denomination examples for documentation or tests.
Limits and safety notes
- Do not use a rounded display value as an exact on-chain integer. Fiat conversion is only a reference based on the entered ETH price. The interface must document whether calculations use exact integers/decimal arithmetic and where rounding occurs.
- The core transformation runs in the current browser component. Browser extensions, clipboard history, downloaded files and site-wide diagnostics remain separate exposure points, so never enter production secrets unless you have reviewed the complete environment.
Troubleshooting
Fiat value is stale
replace the ETH price; the page should not imply it is live.
Gas estimate needed
use the dedicated gas fee calculator rather than treating denomination conversion as a fee forecast.
Frequently asked questions
How many Wei are in one ETH?
One Ether equals 1,000,000,000,000,000,000 Wei, or 10^18 Wei.
How many Wei are in one Gwei?
One Gwei equals 1,000,000,000 Wei, or 10^9 Wei.
Is the USD conversion a live market price?
The fiat output is derived from an editable or static ETH price unless a verified live source and timestamp are shown.
Is it safe and private?
The calculation runs in this browser component, but that alone is not a complete privacy guarantee. Use non-production data unless you have also reviewed extensions, clipboard history, downloads and site diagnostics.
Does it work on mobile?
The layout adapts to narrow screens. File selection, camera access, clipboard actions and downloads still depend on the permissions and capabilities of the mobile browser.
Related tools
Use the tool
Enter the source value once, copy the exact denomination you need and retain the unit label in code, documentation or transaction review.