Free online plumbing calculators for construction professionals, contractors, and DIY enthusiasts.
Most used tools
Calculate flow rate through a pipe
Find the right water pipe size for your fixtures
Calculate head loss from pipe friction
Calculate total plumbing project cost
Recently popular tools
18 tools available
Determine the internal volume of a pipe
Calculate flow rate through a pipe
Find the right water pipe size for your fixtures
Calculate drain pipe size from fixture units
Determine pipe weight per unit length
Find the right water heater size for your home
Determine sewer pipe size for your drainage system
Determine gas pipe size for your appliance load
Determine the number of sprinkler heads required
Calculate water pressure from elevation
Determine volume of a cylindrical tank
Calculate volumetric flow rate from pipe and velocity
Calculate pipe slope from rise and run
Calculate head loss from pipe friction
Estimate daily water usage from fixture count
Estimate heat loss from an insulated pipe
Calculate septic tank size for your home
Calculate total plumbing project cost
More construction tools available
Our plumbing calculators provide accurate, instant results for construction professionals, contractors, and DIY enthusiasts. Each calculator uses industry-standard formulas and handles edge cases to deliver reliable estimates.
Whether you need to estimate materials, calculate costs, or plan your next project, our plumbing tools deliver reliable results to help you make informed decisions and stay on budget.
