VALVETOOL
Size it right — valve Cv, flow velocity, pressure drop, and the fluid-control calculators every piping job needs.
From working out a valve Cv and the pressure drop it imposes to checking pipe velocity, sizing a control valve, converting flow units, and classifying the flow regime, ValveTool pairs free hands-on fluid-control calculators with practical guides and an illustrated museum. Size it right, flow it well.
Valve & Fluid-Control Calculators
Free tools for every fluid system — valve Cv calculator, pressure drop calculator, flow velocity calculator, valve sizing, flow rate unit converter, and Reynolds number calculator.
Valve Cv Calculator
Turn a flow rate, pressure drop, and specific gravity into the flow coefficient a valve needs, in US Cv and metric Kv.
Valve Pressure Drop Calculator
Estimate the pressure a valve consumes from flow, its Cv, and specific gravity — reported in psi and bar.
Flow Velocity Calculator
Get fluid velocity in a pipe from volumetric flow and inside diameter, with a warning when the line runs too fast.
Valve Sizing Calculator
Get the required Cv for a duty and the next-larger nominal rated Cv, with headroom so the valve isn't run wide open.
Flow Rate Unit Converter
Convert a volumetric flow between US GPM, litres per minute, cubic metres per hour, and CFM in one step.
Reynolds Number Calculator
Work out the Reynolds number and whether the flow is laminar, transitional, or turbulent from velocity, diameter, and viscosity.
The Museum
Browse an illustrated museum built entirely from Wikipedia and Wikimedia Commons — explore its collections, each in its own gallery, purely for the pleasure of looking and learning.
Tour the museum →From the Journal
Guides on choosing valve types, sizing for flow and pressure drop, actuation, and keeping a piping system running — practical reading to pair with the calculators above.
Valve Industry Trends: Professional Insights and Tips
Innovations and Market Shifts Shaping the Future of Valve Manufacturing The valve industry stands at a pivotal crossroads, driven by rapid technological advancements, evolving environmental regulations, and shifting global demand…
The Evolution and Future of Valve Innovation in Modern Engineering
The Evolution and Future of Valve Innovation in Modern Engineering In an era defined by technological advancement and industrial transformation, the evolution of valves has emerged as a cornerstone of…
The Future of Precision: Exploring Automated Valves in Modern Engineering
The Future of Precision: Exploring Automated Valves in Modern Engineering In an era defined by technological advancement, automation has become a cornerstone across various industries, from manufacturing to energy production….
The Intelligent Revolution: Understanding Smart Valves in Modern Industrial Systems
The Intelligent Revolution: Understanding Smart Valves in Modern Industrial Systems In an era where industrial efficiency is paramount, smart valves are emerging as game-changers in fluid control systems. These advanced…
The Essential Role of Pneumatic Valves in Modern Industrial Automation
The Essential Role of Pneumatic Valves in Modern Industrial Automation Pneumatic valves are indispensable components in industrial automation systems, serving as critical control elements that regulate the flow of compressed…
The Essential Role of Hydraulic Valves in Modern Engineering Systems
The Essential Role of Hydraulic Valves in Modern Engineering Systems In the intricate world of fluid power systems, hydraulic valves stand as silent yet critical components that regulate the flow,…
Keep Learning
Plain-language explainers on valve types, flow coefficients, pressure drop, cavitation, actuation, and piping fundamentals — everything you need to understand the numbers the tools produce and specify a system with more confidence.
Visit the Learn hub →