Calculate friction and pressure loss. Hazen-Williams, Darcy-Weisbach.
About Head Loss Calculator
Head Loss Calculator is a tools app developed by ZkDev.
Download Statistics
Head Loss Calculator has been downloaded 140 times. In the last 30 days, the app was downloaded 43 times.
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App Information
Head Loss Calculator is FREE to download. The APK download size is 20.11 MB. The latest version available is 1.0.4. The last update was on July 23, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on Google Play April 2026.
Description
Head Loss Calculator helps you calculate friction and pressure loss in water piping systems using the Hazen-Williams equation, Darcy-Weisbach formula, and Swamee-Jain friction factor method. Instantly determine pressure drop in any pipe material over any distance. Support 11 pipe materials from copper to galvanized steel with accurate C-coefficients. Works 100% offline on the job site. Useful for sizing booster pumps, pressure reducing valves, and water supply systems.
FEATURES • 2 Calculation Methods: Hazen-Williams equation (traditional plumbing) and Darcy-Weisbach formula with Swamee-Jain friction factor (engineering method) • 11 Pipe Materials: copper, PVC, CPVC, PEX, HDPE, stainless steel, galvanized steel, black iron, cast iron (new and old/corroded), and concrete — with published C-coefficients and roughness factors • Flow Rate Units: GPM (US gallons per minute), L/s (liters per second), and CFM (cubic feet per minute) • Pipe Diameter Range: Calculate loss for 1/2-inch through 4-inch and larger pipes • Flow Velocity Calculation: Automatic velocity calculation with high-velocity warning (>8 ft/s indicates sizing issue) • Results in Multiple Units: Pressure loss displayed in PSI and feet of head for system analysis • Pipe Length Support: Calculate loss for pipe runs from 10 feet to 500+ feet
HOW IT WORKS 1. Enter water flow rate (GPM) from fixture unit calculations 2. Select pipe material (copper, PVC, galvanized steel, etc.) 3. Enter pipe diameter and total run length 4. Choose calculation method (Hazen-Williams or Darcy-Weisbach) 5. See pressure loss in PSI and feet of head 6. Check velocity warning - velocities >8 ft/s indicate undersized pipe
PERFECT FOR • Plumbers designing water supply systems with booster pumps • Engineers calculating pressure loss for system analysis • Contractors estimating pump requirements • Mechanical estimators sizing pressure tanks and regulators • Plumbing inspectors verifying system design • Facilities managers troubleshooting low pressure issues
OPTIONAL PRO UPGRADE — $2.99 ONE-TIME IN-APP PURCHASE The following features require a separate one-time in-app purchase. They are not required to use the calculator: • Unlimited saved calculation history • PDF export of results • Dark theme • Ad-free experience
STANDARDS & COMPLIANCE Hazen-Williams Equation - traditional plumbing industry standard, Darcy-Weisbach Formula with Swamee-Jain Friction Factor - engineering standards for pipe friction calculation, Material-specific C-coefficients and roughness factors per engineering references, IPC water supply system design guidance.
PERFECT FOR • Plumbing engineers and designers • Plumbing contractors and estimators • Mechanical engineers • Facilities and building managers • Plumbing inspectors • Pump and equipment specialists
OFFLINE & PRIVACY • Works 100% offline - calculate pressure loss anywhere • No account required - instant calculations • No data collection - all results stored locally • No internet dependency
Part of PlumbTools Suite - professional plumbing and engineering calculator tools. Calculate pressure loss accurately, size pumps correctly, and optimize water system design with precise head loss calculations.
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