US Gallons to Kilograms for Water
Snapshot
For Water, 1 US Gallon equals about 3.774056 Kilograms.
- Material basis: Water at 997 kg/m^3.
- Example: For 0.1 US Gallons of Water, the result is 0.377406 Kilograms.
Interactive conversion
Converter Calculator
Decimals: 1.5 or 1,5. Fractions: 1/2. Scientific notation: 1e3. Write 1000 without grouping separators.
3.774056 Kilograms (Water)
SwitchAPI and AI agent access
US Gallons to Kilograms for Water. Material: water.
Machine-readable identifiers
- Conversion family
material-density- Source unit
gallon_us- Target unit
kilogram- Material
water
Use these identifiers in the API request. Sources and model limits also apply to software clients.
Example API request and response
POST /api/v1/convertRequest
{
"family": "material-density",
"value": 1,
"from": "gallon_us",
"to": "kilogram",
"material": "water"
}Essential response
{
"ok": true,
"conversion": {
"family": "material-density",
"value": 1,
"from": "gallon_us",
"to": "kilogram",
"result": {
"raw": 3.77405554865,
"display": "3.774056"
},
"canonicalPath": "/material-density/us-gallons-to-kilograms/water/"
}
}Explanation
US Gallons of Water convert to kilograms using one fixed density basis of 997 kg/m^3. Match temperature, composition and material grade to the stated reference conditions.
Approximate liquid water density near room temperature.
Common Conversion Values
| US Gallons (Water) | Kilograms (Water) |
|---|---|
| 0.1 | 0.377406 |
| 1/4 | 0.943514 |
| 1/2 | 1.887028 |
| 1 | 3.774056 |
| 2 | 7.548111 |
| 5 | 18.870278 |
| 10 | 37.740555 |
| 25 | 94.351389 |
| 50 | 188.702777 |
| 100 | 377.405555 |
Methodology
Water density and calculation basis
Evidence status: publishable.
Approximate density of air-free water at 25 °C, rounded to the nearest kg/m³.
temperature: 25 °C
composition: Air-free water
Source basis: NIST, NISTIR 7383 (2019), Selected Procedures for Volumetric Calibrations. GLP 10, Table 2, printed p.6 / PDF p.15, 25 °C air-free row. https://nvlpubs.nist.gov/nistpubs/ir/2019/NIST.IR.7383-2019.pdf Applicability: adopted-context.
For this direction, mass is calculated as volume multiplied by density after normalizing the units to cubic meters and kilograms. The resulting page multiplier is 3.774056 kg per gal (US).
Use a measured density for a specific batch, grade or supplier; the table value is a reference, not a product specification.