Practical household calculators

Useful calculators with clear, checkable math.

PracticalCalcs helps U.S. households estimate home improvement, moving, and energy decisions with transparent formulas, visible assumptions, and no account required.

Home improvement

Concrete Slab Calculator

Estimate concrete slab cubic yards, waste allowance, metric volume, and ready-mix cost using U.S. feet, inches, and dollars.

Home improvement

Concrete Bag Calculator

Estimate how many 40, 50, 60, or 80 lb concrete bags you need, including waste allowance, volume, and material cost.

Calculator directory

Available calculators

Concrete Slab Calculator

Estimate concrete slab cubic yards, waste allowance, metric volume, and ready-mix cost using U.S. feet, inches, and dollars.

Concrete Bag Calculator

Estimate how many 40, 50, 60, or 80 lb concrete bags you need, including waste allowance, volume, and material cost.