Free Construction & Material Calculators
Get accurate, free calculators for concrete, asphalt, gravel and more — built for contractors, DIYers and homeowners. Plan your materials, estimate quantities and budget your project with confidence.
Popular Calculators
Concrete Slab Cost Calculator
Estimate concrete volume, bags and total cost for any slab.
Asphalt Calculator
Calculate asphalt tonnage and material needed for driveways and lots.
Gravel Calculator
Find how much gravel you need by area and depth.
Concrete Block Calculator
Estimate blocks, mortar and cost for any wall project.
Why Use SlabCalc
- Free forever — no sign-up or subscription required.
- Built for accuracy using standard industry formulas.
- Mobile-friendly, so it works right on the job site.
Frequently Asked Questions
Are the calculators free?
Yes — every calculator on SlabCalc is completely free to use, with no sign-up required.
How accurate are the estimates?
Our calculators use standard industry formulas to produce reliable estimates. Always verify quantities and costs with your local supplier before ordering.
Do I need to sign up?
No. All calculators work instantly — no account or sign-up needed.
What units are supported?
Both imperial and metric units are supported, so you can enter measurements in feet, inches, meters or centimeters.