Comparing Properties Across Common Fluids

This page collects specific gravity, kinematic viscosity, and dynamic (absolute) viscosity vs. temperature for a broad cross-section of fluids used across aerospace, industrial, and automotive applications including military hydraulic and lubricating oils, phosphate-ester and silicone fluids, glycols, fuels, and common reference liquids. The charts and calculators below cover the fluids listed by category in the table below.

Category Fluids
Reference Liquid Water
Aerospace/Military Hydraulic & Lubricating Oils MIL-PRF-7808, MIL-PRF-83282, MIL-PRF-5606, MIL-PRF-23699, MIL-PRF-6081 (1010), MIL-PRF-6082 (1100) / SAE 50, 90 & 140 Avg, MIL-PRF-6083, MIL-PRF-87257, Hatcol 2925
Phosphate Ester (Skydrol) Fluids Skydrol 500B-4, Skydrol LD-4, Skydrol 7000
Silicone Fluids Silicone Fluid 200 cS, Silicone Fluid 500 cS, Silicone Fluid 1000 cS
Glycols Ethylene Glycol 100%, Ethylene Glycol/Water Mixture 50/50, Ethylene Oxide
Fuels & Petroleum Distillates #4 Fuel Oil & Bunker C, Diesel Fuel, Benzene, Kerosene, Jet A, JP-4, JP-5, JP-8, MIL-C-7024 Type II, Automobile Gasoline Avg, MIL-G-5572 Aviation Gasoline
Solvents Alcohol & Acetone
SAE Motor & Gear Oils SAE 10 Oil, SAE 20 Oil, SAE 30 Oil, SAE 40 Oil, SAE 90 Oil, SAE 140 Oil
Specific Gravity vs. Temperature

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Specific gravity referenced to water at 60 °F.

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Kinematic Viscosity vs. Temperature

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Y-axis is logarithmic.

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Dynamic (Absolute) Viscosity vs. Temperature

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Computed from kinematic viscosity × specific gravity (μ = ν × SG). Y-axis is logarithmic.

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Density vs. Temperature

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Density in kg/m³, converted from the specific gravity chart into absolute units.

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Density & Specific Gravity Calculator
Degrees (°F)
Degrees (°C)
Density (kg/m³):  
Density (lb/in³):  
Density (lb/gal):  
Density (lb/ft³):  
Specific Gravity*:  
Specific Gravity**:  
Specific Gravity***:  
°API****:  
% Vol. Change from 68°F:  
% Density Change from 68°F:  

Specific Gravity is a Contentious Unit

* SG based on static density of water of 1000 (kg/m³) *

** SG based on static density of water of 998 (kg/m³) **

*** SG based on temperature dependent density of water ***

**** °API is typically referenced at 60°F ****

Viscosity Calculator
Degrees (°F)
Degrees (°C)
Kinematic Viscosity
mm²/s (= cSt):  
Centistokes (cSt):  
Stokes (cm²/s):  
m²/s:  
in²/s:  
ft²/s:  
Dynamic (Absolute) Viscosity
mPa·s (= cP):  
Centipoise (cP):  
Poise (g/(cm·s)):  
Pa·s (Poiseuille):  
lbm/(ft·s):  
Sources

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