Viscosity Converter

• •Use the Viscosity Converter when you need accurate results quickly without the risk of manual computation errors or unit conversion mistakes.
• •Use it to verify calculations made by hand or in spreadsheets — an independent check can catch errors before they lead to costly decisions.
• •Use it to explore how changing input parameters affects the output — a quick way to develop intuition and identify the most influential variables.
• •Use it when collaborating with others to ensure everyone is working from the same numbers and applying the same assumptions.

The Viscosity Converter is a free, browser-based calculation tool for engineers, students, and technical professionals. Convert dynamic viscosity values between Pascal-seconds, centipoise, poise, pound per foot-second, and pound per foot-hour. Critical for fluid mechanics, lubrication engineering, food processing, polymer science, and paint formulation work. It implements standard formulas and supports both metric (SI) and imperial unit systems with automatic unit conversion. All calculations are performed instantly in your browser with no data sent to a server. Use this calculator as a quick reference and sanity-check tool during design, analysis, and learning. Always verify results against primary engineering references and applicable standards for any safety-critical application.

The Viscosity Converter enables accurate conversions between the most widely used units of dynamic viscosity. Dynamic viscosity quantifies a fluid's resistance to shear flow and is fundamental to fluid mechanics, lubrication, chemical processing, and food science. This tool converts between Pascal-seconds (SI standard), centipoise (the most common practical unit), poise (CGS system), and two imperial units (lb/ft-s and lb/ft-h). Whether you are selecting lubricants, designing piping systems, formulating paints, or analyzing blood rheology, this converter ensures you can work seamlessly across unit systems.

• !Confusing dynamic viscosity (Pa-s, cP) with kinematic viscosity (m^2/s, cSt). Dynamic viscosity = kinematic viscosity times density. They are only numerically equal when density is 1 g/cm^3 (as for water).
• !Assuming viscosity is constant across temperatures. Water at 0 degrees C has a viscosity of about 1.79 cP, dropping to 0.28 cP at 100 degrees C, a factor of 6 difference.
• !Mixing up centipoise and centistokes. Centipoise measures dynamic viscosity; centistokes measures kinematic viscosity. For fluids denser than water, cP > cSt.