Home Improvement Calculators

Need to know the circumference of a circle? How about the average cost to operate your blender? Now you can find answers to these questions and many more with Home Improvement Calculators from Home Improvement Guide Book. Choose from any of the calculators below to get started.

Appliance Operating Cost Calculator
This JavaScript calculator will help you to estimate the cost of operating any given electrical appliance, based on the average KWH (kilowatt hours) used per day, and on the average cost per KWH charged by your electric company.

Area Calculator
Want to find the area of a square? How about a rectangle, parallelogram or a triangle? Just choose the appropriate shape and fill in the dimensions below to calculate area.

Board Footage Calculator
Enter the length, width and thickness of the stock and we'll give you the board feet!

Concrete Estimator
Need to know how much concrete you will need for a particular size pad? Find out!

Drywall Calculator
Enter the dimensions of the room, height of the walls and whether or not you are drywalling the ceiling. The calculator does the rest! You can subtract for windows and doors. It will even tell you how much joint compound and tape you will need. Nails or screws too!

Flooring Calculator
Calculate board feet or square feet for hardwood flooring.

Home Refinance Calculator
This JavaScript calculator will help you to decide whether or not you should refinance your current mortgage at a lower interest rate. Not only will this calculator calculate the monthly payment and net interest savings, but it will also calculate how many months it will take to break even on the closing costs.

Insulation Calculator
Enter gross area and center width of framing and our calculator will tell you how much insulation you need for the job!

Length Converter
Convert centimeters to inches, feet to yards, miles to kilometers and more!

Paint Calculator
Determine how much paint you'll need for any given project based on wall and ceiling dimensions.

Roofing Calculator
Calculate the amount of shingles and roofing felt required for your project based on roof dimensions.

Siding Calculator
Find out how much siding you'll need to complete your project. Includes estimates for a variety of different siding types.