Plan your home project before you buy a single bag
Work out how much paint, concrete, flooring, mulch or gravel you need — and what it will cost. Check what your appliances really cost to run with the latest official electricity prices for every US state.
Building materials
Concrete, paint and flooring quantities and costs.
Paint CalculatorGallons of paint and cost for any room, walls and ceiling.Concrete CalculatorCubic yards, bags and cost for slabs, footings, columns and post holes.Flooring CalculatorSquare footage, boxes and cost for laminate, vinyl, tile or hardwood.
Yard & garden
Mulch, gravel and landscaping materials.
Mulch CalculatorCubic yards and bags of mulch for any bed size and depth.Gravel CalculatorTons and cubic yards of gravel or crushed stone for driveways and paths.
Energy & bills
Electricity cost, state rates and solar savings.
Electricity Cost CalculatorWhat any appliance costs to run per day, month and year in your state.Electricity Rates by State (August 2026)Average residential price per kWh in all 50 states, ranked.Solar Panel Savings & Payback CalculatorEstimate solar system size, cost, yearly savings and payback years.
Why use HomeCostGuru?
- Real numbers. Electricity prices come from the U.S. Energy Information Administration and are refreshed when new data is published.
- Formulas shown. Every page explains the math, so you can check it.
- US and metric. Switch between feet/inches and meters/centimeters.
- Share your result. Copy a link with your numbers to send to a partner or contractor.