Fluid Viscosity/Density Guide

Fluid Viscosity/Density Guide: Simple and Useful Conversions

Viscosity is commonly understood to be a fluids thickness or resistance to flow. There are many units of measurement when referring to viscosity, below are some simple and useful conversions to understand the thickness of various fluids:

cSt (Centistokes) or mm²/s x 4.62 = SSU (Seybolt Seconds Universal)

cPs (Centipoise) or mPa = cSt / S.G (Density)

º Engler / 0.132 = cSt

Below is a table of common fluid densities and viscosities across different temperature ranges based on reliable and trusted information collated from numerous sources within the industry and our own internal knowledge and experience. If you have a fluid which isn’t contained within this list please send us your Material Safety Data Sheet or Chemical Safety Data Sheets with your enquiry so we can be sure to offer you a suitable pump for your requirements. If there are no accessible MSDS or COSHH Sheets available then you can also find in our Tech Zone some videos of various fluids at different viscosities to provide a rough comparison.

Furthermore, we also have the ability to calculate operating viscosities based on actual operational temperatures. If you can provide viscosity information on your fluid at 2 set points (40 & 100ºC for example) and your operating temperature then we can extrapolate the operating viscosity from this information.

FluidTemp ºCViscosity cStDensity kg / LitreFluidTemp ºCViscosity cStDensity kg / Litre
Acetaldehyde200.2950.788Machine Oil – Light20470.9
Acetic Acid201.2321.048Machine Oil – Medium208500.94
Acetic Acid Anhydride200.881.084Mayonnaise202N/A
Acetone200.410.79Mercury200.11913.57
Allyl Alcohol201.6030.852Methyl Acetate200.440.959
Allyl Alcohol301.360.848Methyl Acetate400.350.916
Allyl Chloride200.3540.94Methyl Alcohol01.040.81
Aluminium Chloride (5% Sol)203.541.03Methyl Alcohol100.8550.801
Aluminium Nitrate (10% Sol)204.541.051Methyl Alcohol200.7450.792
Aluminium Sulphate (10% Sol)201.341.115Methyl Glycol201.60.975
Amyl Acetate204.340.885Methylene Chloride200.91.326
Aniline106.41.03Milk201.131.035
Aniline204.371.021Molasses 80 Bx2010N/A
Beer201.80.996Molasses 83 Bx2050N/A
Benzene200.7440.879Molasses 85 Bx20100N/A
Benzene300.650.868Nitro Benzene201.671.203
Benzene400.580.858Nonane01.350.733
Benzene500.540.847Nonane101.150.725
Benzyl Alcohol205.521.045Nonane2010.717
Bromine200.343.12Octane01.050.719
Butyl Acetate200.8320.885Octane100.9350.711
Butyl Alcohol203.640.81Octane200.8050.702
Butyl Alcohol302.850.803Octane400.640.685
Butyric Acid n02.350.977Oil, SAE 10W-30201300.875
Butyric Acid n201.610.957Oil, SAE 10W201150.87
Calcium Chloride (25% Sol)203.91.227Oil, SAE 20W-20202000.885
Calcium Chloride (5% Sol)201.1611.037Oil, SAE 30203500.89
Carbolic Acid2011.31.078Oil, SAE 40209000.9
Carbolic Acid309.71.069Oil, SAE 50209500.902
Carbolic Acid407.951.059Olive Oil2091.50.91
Carbon Disulphate00.331.292Palm Oil20130N/A
Carbon Disulphate100.3161.277Paraffin Oil202.40.804
Carbon Disulphate200.2981.262Paraffin Oil301.850.78
Carbon Tetrachloride200.6121.595Pentane00.440.646
Carbon Tetrachloride300.5251.525Pentane100.390.636
Castor Oil2010170.96Pentane200.360.626
Castor Oil403150.95Phenol2011.31.078
Castor Oil601150.94Phenol407.951.059
Caustic Soda, 50%2045N/APolyester Resin203N/A
China Wood Oil203080.933Polymer Solution2020N/A
Chloroform200.381.489Potassium Hydroxide2067N/A
Chloroform400.371.452Printing Ink & Colours20550-2200N/A
Chloroform600.351.415Propanol202.80.804
Cod Liver Oil4035N/APropanol401.70.786
Cotton Seed Oil20760.926Propanol501.40.777
Cream, 30-50% Fat2011-115N/APropionic Acid201.130.99
Cyclohexanol20710.952Propylene Glycol20541.038
Cyclohexanone204.90.952Rapeseed Oil201780.92
Cylinder Oil20500000.94Sea Water01.7741.028
Dioxan2021.03Sea Water101.3461.028
Ethyl Acetate200.510.905Sea Water201.0441.025
Ethyl Alcohol201.510.772Sea Water400.6591.019
Ethyl Alcohol401.160.737Sea Water600.4421.01
Ethyl Glycol202.30.93Sea Water800.3110.998
Ethylene Glycol20181.112Shampoo203N/A
Ethylene Glycol3016.51.104Sodium Chloride (25% Sol)202.41.19
Formic Acid201.51.22Sodium Hydroxide (20% Sol)2041.226
Formic Acid301.381.208Sodium Hydroxide (30% Sol)20101.33
Fuel Oil, Extra Light2060.85Soya Bean Oil20750.926
Fuel Oil, Light2016.50.91Styrene200.90.926
Fuel Oil, Medium205200.99Sulphuric Acid2014.61.839
Fuel Oil, Heavy2080000.99Tetrachloroethane201.11.593
Furfural201.451.16Tetrachloroethane200.951.621
Gear Oil2030000.905Toluene200.680.867
Gelatine451.2N/AToluene400.550.849
Glycerine2011831.261Toluene600.460.831
Glycol2020N/ATomato Ketchup301N/A
Heptane00.740.702Transformer Oil20300.95
Heptane100.660.692Trichloroethylene200.951.463
Heptane200.60.682Water01.7881
Heptane400.510.661Water101.3071
Hexane00.620.678Water201.0020.998
Hexane100.570.668Water400.6620.992
Hexane200.510.658Water600.4750.983
Hexane400.40.639Water800.3650.972
Honey402N/AWater1000.2950.958
Kerosene202.40.804Xylene-O200.930.864
Kerosene301.850.78Xylene-O400.740.847
Linseed Oil20470.92Yoghurt40150N/A
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