Measure once.
Order right.
Free landscaping and construction material calculators — gravel, mulch, concrete, pavers, fence, deck, grass seed — with bag counts, tons, and cost estimates.
What are you building?
Quick Estimator
Gravel or mulch — rectangle only. For shapes & multiple areas, use the full calculators.
Popular Calculators
Gravel Calculator
Cubic yards, tons, and bag count for gravel, crushed stone, and decorative rock.
Mulch Calculator
Bags or bulk cubic yards of mulch for garden beds and tree rings.
Concrete Calculator
Bags for slabs, footings, post holes, and columns — 40/60/80 lb.
Paver Calculator
Paver count, base gravel, bedding sand, and polymeric sand bags.
All Estimators by Category
Gravel & Stone
Calculate how much gravel, crushed stone, pea gravel, or decorative rock you need for driveways, paths, and drainage projects.
Mulch & Soil
Estimate cubic yards of mulch, topsoil, and raised-bed soil mix for garden beds, tree rings, and planting areas.
Concrete
Figure out how many bags of concrete you need for slabs, footings, fence posts, and columns — with ready-mix comparisons.
Pavers & Walls
Count pavers, base gravel, bedding sand, and retaining wall blocks for patios, walkways, and landscape walls.
Fences & Decks
Estimate posts, rails, pickets, concrete, deck boards, joists, and hardware for fencing and decking projects.
Lawn & Seed
Calculate grass seed by species, sod rolls and pallets, and fertilizer pounds needed for new lawns and overseeding.
Material Density Reference
Weights used in YardMath calculators. Sources: Braen Stone, USGS, Penn State Extension. See methodology for full citations.
| Material | lb/yd³ | tons/yd | Category |
|---|---|---|---|
| Pea Gravel | 2,700 | 1.35 | Gravel |
| Crushed Stone #57 | 2,700 | 1.35 | Gravel |
| Crusher Run (#21A) | 2,850 | 1.43 | Gravel |
| River Rock | 2,835 | 1.42 | Gravel |
| Decomposed Granite | 2,565 | 1.28 | Gravel |
| Concrete/Mason Sand | 2,700 | 1.35 | Sand |
| Lava Rock | 1,215 | 0.61 | Decorative |
| Screened Topsoil | 2,025 | 1.01 | Soil |
| Compost | 1,000 | 0.50 | Soil |
| Shredded Wood Mulch | 450 | 0.23 | Mulch |
| Bark Mulch | 540 | 0.27 | Mulch |
Latest Guides
All guides →Concrete Slab Cost: 2025–2026 Pricing Guide
Concrete slabs cost $6–$12 per sq ft installed (2026). A 10×10 slab runs $600–$1,200. Full breakdown by size, thickness, and DIY vs. contractor with worked examples.
Overseeding Your Lawn: When, How, and at What Rate
Overseed cool-season lawns Aug 15–Oct 15; warm-season lawns in May–June. Mow low, dethatch or aerate, seed at half the new-seeding rate, water 2–3x daily for two weeks.
How to Lime a Lawn: Rates, Timing, and Soil pH
Lime your lawn when soil pH is below 6.0 for most grasses. Apply up to 50 lb per 1,000 sq ft per application. Soil test first — overliming causes its own problems.
Fence Cost Per Linear Foot: 2025–2026 Guide
Fence installation costs $10–$25/linear ft for chain link, $15–$35 for wood, $25–$45 for vinyl, and $35–$70 for wrought iron (2025 national ranges). Full budget guide.
When to Fertilize Your Lawn: Cool and Warm Season Schedules
Cool-season lawns get most fertilizer in fall (Aug–Nov); warm-season lawns in late spring and summer. Schedules and nitrogen rates by grass type.
What Do Fertilizer Numbers Mean? NPK Explained
The three fertilizer numbers are the NPK ratio: % nitrogen, % phosphate, % potash by weight. A 28-0-6 bag has 28% nitrogen and no phosphorus. How to read and use them.