Outdoor
Planning a Gravel Driveway: Depth and Coverage
Choose the right gravel depth, calculate tonnage, and prep your base for a driveway that lasts.
9 min read
Read articleOutdoor Calculators
Estimate gravel tonnage, mulch bags, topsoil volume, fence materials, and paver counts for driveways, beds, patios, and landscaping projects.
Updated Jun 2026 · 5 calculators · 4 guides
What outdoor calculators help you estimate
Outdoor projects span bulk landscape materials, fencing, and hardscape. These calculators convert length, width, and depth into cubic yards, tons, bags, posts, pickets, or paver counts so you can order the right amount from your supplier.
Which calculator should you use?
Match the calculator to the material you are buying.
- Gravel Calculator — cubic yards and tons for driveways and paths
- Mulch Calculator — bags or volume for garden beds
- Topsoil Calculator — cubic yards for lawns and grading
- Fence Calculator — posts, rails, and pickets
- Paver Calculator — paver count for patios and walkways
Common outdoor project mistakes
- Using path depth for a driveway that needs thicker gravel
- Ordering mulch by bags when bulk delivery is cheaper above ~1 yd³
- Ignoring compacted base layers under gravel or pavers
- Wrong post spacing leading to sagging fence sections
- Skipping waste on pavers and running short at edges
How SmartMaterialCalc estimates outdoor materials
Bulk materials use volume (length × width × depth) converted to cubic yards or cubic feet, with density for tonnage where needed. Fence and paver tools use spacing and module width math with standard waste rounding.
Outdoor calculators
Free tools for outdoor projects — click any calculator to get started.
Gravel Calculator
Calculate tons or cubic yards of gravel for driveways and landscaping.
CalculateMulch Calculator
Estimate cubic yards of mulch for garden beds and landscaping.
CalculateTopsoil Calculator
Calculate cubic yards of topsoil for lawns, gardens, and raised beds.
CalculateFence Calculator
Estimate fence posts, rails, and pickets from run length and spacing.
CalculatePaver Calculator
Estimate paver count for patios, walkways, and driveways.
CalculateRelated guides
Planning tips and formulas for outdoor projects.
Outdoor
Gravel Depth Guide: How Deep Should Gravel Be?
Choose the right gravel depth for driveways, paths, and drainage beds — with depth recommendations by use case.
9 min read
Read article
Outdoor
Mulch Depth Guide: How Much Mulch Do You Need?
Find the ideal mulch depth for garden beds, trees, and pathways — and how to calculate cubic yards or bags.
9 min read
Read article
Outdoor
Fence Post Spacing and Material Estimates
Standard post spacing, panel counts, and hardware estimates for wood and vinyl fencing projects.
9 min read
Read articleFrequently asked questions
Measure area length and width in feet and depth in inches. Each calculator converts to the right unit — tons for gravel, bags or cubic yards for mulch, cubic yards for topsoil.
Bagged mulch and soil suit small beds. Bulk delivery by the cubic yard is usually cheaper for projects over about one cubic yard.
Driveways commonly need 4–6 inches of gravel over a compacted base. Paths may only need 2–3 inches.
Apply 2–3 inches for maintenance and weed suppression. New beds may use 3–4 inches initially.
Wood and vinyl privacy fences typically use posts every 6–8 feet. The Fence Calculator uses your spacing input to count posts and sections.
No. Paver calculators estimate paver count only. Sand and gravel base materials are ordered separately.
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