Construction calculators that give the finished answer
Not just a number — the full project picture: quantities, bag counts, and what it should cost at current prices. Every tool publishes its formula, its assumptions, and when its prices were last updated.
What are you building?
All calculators
Concrete slab calculator
Cubic yards, 80-lb bag counts, and ready-mix cost for slabs, patios, and pads.
Open calculator ›Gravel calculator
Tons and yards for driveways, base layers, patios, and drains — by material.
Open calculator ›Asphalt driveway calculator
Hot-mix tonnage, material cost, and the installed range to judge quotes by.
Open calculator ›Roof replacement cost calculator
Squares from footprint and pitch, priced by material at 2026 rates.
Open calculator ›Roof pitch calculator
Rise over run to pitch, degrees, and the multiplier — with the full table.
Open calculator ›Deck materials calculator
Boards, joists, and fasteners — the full bill of materials for your size.
Open calculator ›Board-foot calculator
Lumber volume and cost by dimensions, with common-size tables.
Open calculator ›Fence calculator
Pickets, posts, rails, and concrete bags for your length — priced both ways.
Open calculator ›Mulch & topsoil calculator
Cubic yards and bag counts for beds and lawns, bulk vs bagged cost.
Open calculator ›No calculator matches — try a different word, or browse all above.
Why trust these numbers?
Every formula is published
Each calculator shows exactly how it computes — formulas, yields, densities, waste factors — so you or your contractor can check the math.
Every price is dated
Cost estimates use national-average prices with a visible "prices updated" stamp, re-verified against published sources on a schedule.
Free means free
No sign-up, no paywall, no gating — the site is supported by clearly-separated advertising, never by charging you.
Your local supplier’s quote is always the final word; our job is to get you to that conversation knowing what you need and what it should cost.
Cost guides
Fence cost (2026)
Wood, chain-link, vinyl — installed per foot and by yard size.
Read the guide ›Concrete driveway cost (2026)
Per square foot and by size — and how to judge the quotes.
Read the guide ›Concrete slab cost (2026)
Per square foot and by size, with the honest DIY comparison.
Read the guide ›Concrete patio cost (2026)
Plain vs stamped, by patio size — with the DIY materials math.
Read the guide ›Asphalt vs concrete driveway
Cost, lifespan, and climate — which surface pencils for you.
Read the guide ›Gravel driveway cost (2026)
The cheapest driveway there is — priced by length.
Read the guide ›