ISO Grade Oils - Viscosities and Densities
Viscosities and densities of ISO and equivalent SAE grade oils.
Overview
This tool provides reference data for ISO grade oils, including their viscosities and densities.
ISO Grade Oil Classifications
ISO viscosity grades are standardized industrial oil classifications based on kinematic viscosity at 40°C:
| ISO Grade | Kinematic Viscosity (cSt at 40°C) | Typical SAE Equivalent | Typical Density (kg/m³) |
|---|---|---|---|
| ISO 10 | 9-11 | SAE 5W | 800-820 |
| ISO 15 | 13.5-16.5 | SAE 10W | 810-830 |
| ISO 22 | 19.8-24.2 | SAE 15W | 815-835 |
| ISO 32 | 28.8-35.2 | SAE 20W | 820-840 |
| ISO 46 | 41.4-50.6 | SAE 30 | 825-845 |
| ISO 68 | 61.2-74.8 | SAE 40 | 830-850 |
| ISO 100 | 90-110 | SAE 50 | 835-855 |
| ISO 150 | 135-165 | SAE 60 | 840-860 |
| ISO 220 | 198-242 | - | 845-865 |
| ISO 320 | 288-352 | - | 850-870 |
| ISO 460 | 414-506 | - | 855-875 |
| ISO 680 | 612-748 | - | 860-880 |
| ISO 1000 | 900-1100 | - | 865-885 |
Key Properties
- Kinematic Viscosity: Measured at 40°C (104°F), expressed in centistokes (cSt)
- Density: Typical range at 15°C, expressed in kg/m³
- SAE Equivalents: Approximate Society of Automotive Engineers classifications for motor oils
Applications
- ISO 10-32: Light machine oils, refrigeration oils, spindle oils
- ISO 46: General purpose hydraulic oils, compressor oils
- ISO 68-100: Heavy-duty hydraulic oils, gear oils
- ISO 150+: Industrial gear oils, marine applications
Notes
- Viscosity changes with temperature; these values are standardized at 40°C
- Actual densities vary by oil type and additives
- Always consult manufacturer specifications for specific applications
- Viscosity index affects how much viscosity changes with temperature