PlumberCalc.com
22+ free plumbing calculators
Just finished putting together PlumberCalc.com with 22 different calculators I've been working on. Got tired of bouncing between different apps and websites every time I needed to do basic plumbing calculations.
Covers the stuff I find myself calculating regularly:
- Pipe sizing and flow calculations - get the right pipe diameter fast
- Pressure loss calculations - figure out system pressure drops
- Drain and vent sizing - proper drainage system design
- Water heater and expansion tank sizing - residential and commercial
- Pump sizing and selection - match pumps to system requirements
- Hydraulic calculations - flow rates, velocities, head loss
Main thing - everything works instantly on your phone. No app downloads, no registration, loads fast even with crappy cell service on job sites. Just bookmark it and use whatever you need.
Don't collect any data either - just straight-up tools for getting work done.
Features
Flow & Sizing Calculations
- Pipe Sizing Calculator - Calculate appropriate pipe diameter based on flow requirements
- Water Flow Rate Calculator - Determine flow rates through pipes of various sizes and pressures
- Fixture Unit Load Calculator - Calculate fixture unit loads for proper pipe sizing
- Gas Line Sizing Calculator - Size gas lines for appliances and determine proper pipe diameters
Pressure & Loss Calculations
- Friction Loss Calculator - Calculate pressure loss due to friction in pipes and fittings
- Water Pressure Drop Calculator - Calculate pressure drop across pipes, valves, and fittings
- Water Hammer Calculator - Calculate pressure surge and surge protection requirements
Equipment Sizing
- Water Heater Sizing Calculator - Size water heaters for residential and commercial applications
- Tankless Water Heater Flow Rate Calculator - Calculate flow rates and BTU/kW capacity requirements
- Expansion Tank Sizing Calculator - Size thermal expansion tanks for closed loop heating systems
- Sump Pump Sizing Calculator - Size sump pumps for basement and crawl space water removal
- Pump Head & Power Calculator - Calculate pump sizing, head requirements, and power consumption
Drainage & Waste Systems
- Drainage Slope Calculator - Calculate proper slopes for drainage pipes and sewer lines
- Septic System Sizing Calculator - Calculate septic tank and drain field sizing requirements
- Grease Trap Sizing Calculator - Size grease interceptors for commercial kitchens
Specialized Systems
- Hot Water Recirculation Calculator - Calculate pump sizing and energy requirements
- Backflow Preventer Sizing Calculator - Size backflow prevention devices
- Glycol Calculator - Calculate concentrations, freeze protection, and viscosity effects
Utilities & Analysis
- Pipe Volume & Fill Time Calculator - Calculate pipe volume and fill times
- Pipe Insulation Heat Loss Calculator - Calculate heat loss and insulation requirements
- BTU Heating Load Calculator - Calculate heating loads for building equipment sizing
- Project Cost Estimator - Complete project estimation with materials, labor, and markup
Sponsors
Buy
Comments
Great work on PlumberCalc.com! Love that it’s a one-stop shop for all those essential plumbing calculations, especially with mobile-friendly, no-data-collection tools. The instant access and offline capability are huge for job sites. Maybe consider adding a quick tutorial or tooltips for new users? Keep it up!
Premium Products
Sponsors
Buy
Makers
Makers
Comments
Great work on PlumberCalc.com! Love that it’s a one-stop shop for all those essential plumbing calculations, especially with mobile-friendly, no-data-collection tools. The instant access and offline capability are huge for job sites. Maybe consider adding a quick tutorial or tooltips for new users? Keep it up!
Premium Products
New to Fazier?
Find your next favorite product or submit your own. Made by @FalakDigital.
Copyright ©2025. All Rights Reserved