Buy the right amount of material.
The first time.
Honest calculators for concrete, landscaping, and backyard builds. Bag-size aware. Waste factor baked in. Built by DIY Warriors who got tired of guessing in the parking lot.
The calculators
Six tools live or queued. Each one tells you what to buy, in the bag sizes your store actually carries.
Concrete bags
Slabs, footings, post holes — exact bag count with waste factor.
Mulch & topsoil
Cubic yards by bed size, with bag-vs-bulk price alerts.
Fence posts
Post count, gravel, concrete per post, frost-line aware.
Paver patio
Pavers, base gravel, polymeric sand for any layout.
Gravel driveway
Tons by depth and area — base course and topcoat.
Decking boards
Linear feet, screws, joists — by board width and gap.
Go deeper
The articles that explain why the numbers are what they are.
Paver Patio Sizing Guide: From 6×6 to 24×24
Pick the right paver size for your project. Pattern options, base prep, and when bigger isn't better.
How Many Bags of Concrete for a Fence Post?
The complete answer for 4×4, 6×6, and round posts. Hole sizing, bag math, and frost-line depth.
What we promise on every page.
Always free
No paywall, no premium tier, no email gate. Ever.
Math you can trust
Verified against manufacturer spec sheets.
Honest scope
We tell you when to stop DIYing and call a pro.
Mobile-first
Works on your phone while you're holding a shovel.
Whatever you're building this weekend — your first fence, your fifteenth raised bed, the patio you've been sketching for two years — we hope you get it right the first time.
Start with concrete →