Plumbing and Electrical Calculators - Free Calculators for DIY Projects

Wire Gauge Calculator

Find the correct wire gauge for any electrical circuit based on amperage, voltage, and run length.

Calculate the total electrical load on a circuit and find the right breaker size for your appliances.

Calculate the maximum flow rate through any pipe based on diameter, length, pressure, and material.

Estimate how long your water heater takes to recover after heavy use based on tank size and element rating.

Calculate how much PEX tubing expands and contracts with temperature changes to plan loops and offsets.

Calculate the correct drain pipe slope and total drop for any drain run to meet code and ensure proper drainage.

Find the right sump pump capacity for your basement based on pit size, water inflow rate, and discharge height.

Calculate the minimum CFM rating you need for a bathroom exhaust fan based on room size and fixture count.

Calculate the minimum flow rate you need from a whole house water filter based on household size and peak demand.