Free Online Construction Tools & Calculators

Take the guesswork out of your building and remodeling projects with our suite of free online construction tools. Whether you are a general contractor estimating job costs or a homeowner tackling a DIY home improvement project, these construction tools deliver accurate measurements for concrete, lumber, roofing, flooring, and material budgets. Simplify your project planning, reduce waste, and save money by using precision construction tools before you buy materials.

Voltage Drop Calculator

 Square Footage Calculator

 Stair Calculator

 Ohms Law Calculator

 Tile Calculator

 Gravel Calculator

 Concrete Calculator

 BTU Calculator

 Resistor Calculator

 Electricity Calculator