Calculate faster. Design smarter. Verify with confidence.
A modern ProcessFunda experience for chemical and process engineers: searchable calculators, clean inputs, instant results, saved units, mobile-first layouts, and a professional interface built for speed.
Pressure Drop — Liquid
Smart units, validation, and instant output preview.
Calculator library
Search-first layout so users do not have to scroll through long menus. Group calculators by real engineering tasks.
Two Phase Separator Calculator
Separator sizing for liquid and vapor disengagement, holdup, surge time, mist eliminator and vessel dimensions.
Dielectric Constant Calculator
Estimate dielectric constant for process calculations and property checks.
Two Phase Density Viscosity Calculator
Calculate two-phase mixture density and viscosity for hydraulic and sizing work.
Vpour Pressure Calculator
Vapor pressure utility for process property estimation.
NPSHa Calculator
Available NPSH calculation for pump suction checks and cavitation screening.
Gas Density Flow Convert Calculator
Convert gas density and flow values across common engineering units.
Pipe ID OD Calculator
Pipe inside and outside diameter utility for pipe schedule lookup and sizing.
Min Submerge Calculator
Minimum submergence check for suction nozzles and pump intake arrangements.
Two Phase Pressure Drop Calculator
Pressure drop calculator for two-phase flow screening and line hydraulics.
PSV Two Phase Omega Calculator
Two-phase PSV sizing using omega method inputs and relief conditions.
API Gravity Calculator
Convert API gravity, specific gravity and related liquid property values.
Reaction Force Calculator
Relief discharge reaction force estimation for supports and piping checks.
Pipe Heat Loss Calculator
Heat loss from piping with insulation and operating condition inputs.
Saturated Steam Properties Calculator
Saturated steam property lookup for temperature, pressure and utility calculations.
Tank Mixer Power Calculator
Mixer power estimate for tank agitation and equipment checks.
Thermal Relief Valve Calculator
Thermal relief valve sizing for blocked-in liquid expansion scenarios.
Gas Pressure Drop Calculator
Gas pressure drop calculator for line sizing and hydraulic checks.
Pressure Drop - Liquid Calculator
Liquid pressure drop calculator for line sizing and hydraulic checks.
Control Valve Liquid Calculator
Liquid control valve sizing and CV calculation.
Wedge Flow Meter Calculator
Wedge flow meter sizing and differential pressure calculation.
Gas Orifice Calculator
Gas orifice calculation for flow and pressure differential checks.
Normal Vent Calculator
Normal vent sizing for storage tanks and breathing requirements.
Pipe Holdup Calculator
Pipe holdup volume calculator for line inventory estimates.
Flange Rating Calculator
Flange rating check for pressure, temperature and class selection.
Rupture Disk Calculator
Rupture disk sizing and relief area screening.
Pump Efficiency Calculator
Pump efficiency estimate and related pump performance checks.
Pump Power Calculator
Pump hydraulic power, shaft power and motor power calculator.
PVRV Calculator
Pressure vacuum relief valve sizing support for tank venting.
Absolute Humidity Calculator
Absolute humidity and psychrometric property calculation.
Mixed Stream Temp Calculator
Mixed stream temperature calculator for blending and heat balance checks.
Psycometric Chart Calculator
Psychrometric chart and moist air calculation utility.
Froud Number Calculator
Froude number calculation for flow regime and hydraulic screening.
Horizontal Tank Volume Calculator
Horizontal tank volume calculator for level and inventory estimation.
Sound Power Level Calculator
Sound power level utility for noise and acoustic checks.
FIV Calculator
Flow induced vibration screening calculator.
Surge Pressure Calculator
Surge pressure and water hammer calculation for piping systems.
Pump Hydraulic Calculator
Pump hydraulic calculation utility for head, flow and power checks.
Acceleration Head Loss Calculator
Acceleration head loss calculator for reciprocating pump suction/discharge lines.
Air Receiver Calculator
Air receiver sizing utility for compressed air systems.
Vessel Surface Area Volume Calculator
Vessel surface area and volume calculator for preliminary equipment estimates.
AET Calculator
AET calculation utility for process equipment checks.
Compressor FAD Calculator
Compressor free air delivery calculation and conversion.
Cooling Tower Calculator
Cooling tower evaporation, drift, blowdown and makeup water calculator.
NPSH Required Calculator
Required NPSH check for pump selection and operating margin.
Relief Fire Wetted Calculator
Fire relief calculation for wetted vessel or equipment cases.
Relief Fire Unwetted Calculator
Fire relief calculation for unwetted equipment cases.
Pressure To Head Calculator
Convert pressure to fluid head using density and units.
Head To Pressure Calculator
Convert fluid head to pressure using density and units.
PSV Gas Phase Calculator
Gas phase PSV sizing calculator for relief valve area checks.
Emergency Vent Calculator
Emergency vent sizing for tank fire and contingency scenarios.
Control Valve Gas Calculator
Gas control valve sizing and CV calculation.
Flare Stack Diameter Height Calculator
Flare stack diameter and height calculation for preliminary flare checks.
Flare KO Drum Calculator
Flare knockout drum sizing calculator.
Steam Flashing Calculator
Steam flashing calculation for condensate and pressure letdown checks.
PSV Liquid Phase Calculator
Liquid phase PSV sizing calculator for relief valve area checks.
What makes it world class
Designed for engineers who need speed, clarity, repeatability, and fewer input mistakes.
Minimal JavaScript, optimized CSS, lazy-loaded calculators, no heavy animation libraries, and cache-friendly assets.
Users can type “PSV gas”, “NPSH”, “API gravity” or “control valve” and reach the exact calculator quickly.
Large fields, sticky calculate buttons, smart unit selectors, error messages near inputs, and field-friendly readability.
Outputs grouped into primary result, assumptions, warnings, unit conversions, and printable calculation summary.
Add PDF/print summary with inputs, formulas, results, date, disclaimer, and revision number.
Prominent verification disclaimer, formula references, assumptions, and “do not use for final design without checking.”
Recommended user journey
The new site should feel like a professional engineering cockpit, not a blog menu. Every page should guide the user from problem → inputs → result → verification.
Choose task
Search or browse by category: hydraulics, safety, equipment, properties, utilities.
Enter data
Use smart unit selectors, default values, field hints, and validation before calculation.
Review results
Show primary output, secondary outputs, warnings, formulas and assumptions.
Export or share
Print, copy results, generate report, or save recent calculations locally.
Built for preliminary engineering checks
All calculators should keep the existing safety position clear: results are educational/reference estimates and must be independently verified before real-world engineering, safety, regulatory, or commercial use.
Start calculating