Explore free calculators designed to solve everyday problems accurately and easily — including construction math, conversions, and a color picker.
Add and subtract inches (as a decimal or fraction), feet, centimeters, and millimeters. For example, enter a value such as 6' 8 5/16" + 12 cm. Get results in inches, feet, centimeters, and millimeters.
Aliencodes publishes accurate, easy-to-use calculators for contractors, students, engineers, and homeowners. Each tool includes a live form and a long explanation so you can see how the answer was produced.