Gravel Calculator - Calculate Cubic Yards, Tons & Cost

A cubic yard of gravel typically weighs between 2,400 and 2,900 pounds (1.2–1.45 tons), depending on the material type, moisture content, and compaction level. Crushed stone averages 2,700 lbs/yd³, pea gravel is lighter at 2,500 lbs/yd³, while decomposed granite can reach 2,800 lbs/yd³. Lightweight lava rock weighs only 1,400 lbs/yd³—nearly half the weight of standard gravel. Always use your supplier's specific density rating for the most accurate tonnage calculations, as moisture alone can add 10-15% to the weight. For bulk orders over 10 tons, request a certified weight ticket from the supplier.

To calculate gravel in cubic yards: (1) Convert depth from inches to feet by dividing by 12. Example: 4 inches = 4 ÷ 12 = 0.333 feet. (2) Calculate volume in cubic feet: multiply length × width × depth (all in feet). Example: 20 ft × 10 ft × 0.333 ft = 66.6 ft³. (3) Convert to cubic yards by dividing cubic feet by 27. Example: 66.6 ÷ 27 = 2.47 yd³. For circles: Calculate area using πr² (radius = diameter ÷ 2), then multiply by depth in feet. For triangles: Calculate area using (base × height) ÷ 2, then multiply by depth. Pro tip: Add 10% waste factor for compaction and spillage—this prevents expensive second deliveries. Our calculator handles all conversions automatically with built-in waste factor options.

For circular driveways, use the formula: Area = π × radius² (where π = 3.14159 and radius = diameter ÷ 2). Multiply area by depth in feet to get volume in cubic feet, then divide by 27 for cubic yards. Example: A 30-foot diameter circle at 4 inches (0.333 ft) deep: radius = 15 ft → area = 3.14159 × 15² = 706.86 ft² → volume = 706.86 × 0.333 = 235.38 ft³ → cubic yards = 235.38 ÷ 27 = 8.72 yd³. For irregular circular driveways (like semi-circles or kidney shapes), break the area into sections: calculate simple shapes separately (rectangles + partial circles), then add the totals. Our calculator's Irregular Shapes tab automates this process—simply select 'circle,' enter the diameter and depth, and get instant cubic yards and tonnage.

Coverage per ton depends on two critical factors: depth and material density. As a general guideline using crushed stone (2,700 lbs/yd³): at 2 inches deep, one ton covers approximately 120 square feet; at 3 inches deep, one ton covers about 80 square feet; at 4 inches deep, one ton covers roughly 60 square feet. The formula: Coverage (ft²) = (Tons × 2,000 lbs ÷ Density per yd³) × 27 ft³/yd³ ÷ Depth in feet. This is why our calculator shows coverage area in the results—it automatically accounts for your exact depth and material type. Lighter materials like pea gravel (2,500 lbs/yd³) cover slightly more area per ton, while heavier materials like decomposed granite (2,800 lbs/yd³) cover less. Always verify with your specific material's density for project accuracy.

Yes, absolutely. Professional contractors always order 5-15% more gravel than base calculations to account for: (1) Compaction—gravel settles 20-30% during installation and with vehicle traffic, (2) Uneven subgrade—low spots require more fill than expected, (3) Spillage—material lost during delivery, spreading, and edge trimming, (4) Future maintenance—having extra for filling ruts or bare spots saves on delivery fees. Recommended waste factors: 5% for simple, flat rectangular areas with professional installation; 10% for typical residential driveways and paths (industry standard); 15% for irregular shapes, sloped terrain, soft soil, or first-time DIY projects. The cost of ordering 10% extra material ($20-50 typically) is far less than paying for a second delivery ($75-150+ in fees). Running short mid-project causes delays, color/size mismatches (different production batches), and frustration. Our calculator includes adjustable waste factor in Advanced Options—use it.

Crushed stone has angular, fractured edges created by mechanically crushing larger rocks. These sharp edges interlock when compacted, creating a stable, firm surface that resists shifting—ideal for driveways, base layers, and high-traffic areas. Crushed stone drains excellently and is generally more affordable ($30-50/ton). Downsides: Creates dust when dry, uncomfortable to walk on barefoot, industrial appearance. Pea gravel consists of small, naturally rounded stones (typically 3/8 inch diameter) smoothed by water erosion. The round shape makes it comfortable underfoot, visually attractive, and perfect for walkways, playgrounds, decorative landscaping, and garden paths ($35-60/ton). Downsides: Doesn't compact (shifts under weight), spreads easily outside designated areas, requires edge restraints (metal/plastic edging), not suitable for driveways or vehicle traffic. Bottom line: Choose crushed stone for structural applications and durability; choose pea gravel for comfort and aesthetics. Many landscape projects use both—crushed stone base layer (4 inches) with pea gravel surface layer (2 inches) for the best of both worlds.

A properly constructed gravel driveway requires 4-6 inches of compacted depth for standard passenger vehicles. This typically means installing 5-7 inches of loose gravel before compaction. Factors that increase required depth: (1) Heavy vehicles—trucks, RVs, or equipment need 6-8 inches, (2) Soft soil—clay or wet subgrade needs geotextile fabric + thicker base (up to 10 inches total), (3) Poor drainage—areas with standing water require French drains + deeper gravel, (4) High traffic—daily use benefits from 6+ inches to prevent rutting. Professional three-layer system: (1) Subbase layer: 4-6 inches of large crushed stone (#3 or #4) compacted with plate compactor, (2) Base layer: 2-3 inches of mid-size stone (#57 or #67) compacted, (3) Surface layer: 1-2 inches of smaller gravel for smooth finish. Total depth: 7-11 inches before compaction → 5-8 inches compacted. DIY single-layer driveways: Use crusher run or dense-grade aggregate (DGA) at 4-6 inches—it's a blended mix that compacts well without multiple layers. Always compact in 2-inch lifts for best results.

Yes. Our calculator includes a comprehensive cost estimator in the Advanced Options section. Here's how to use it: (1) Get supplier pricing: Call or check websites for current price per ton or price per cubic yard (prices vary by region, material, and season). (2) Enter material cost: Input your supplier's price—the calculator multiplies by your required tonnage. (3) Add delivery fee: Most suppliers charge $50-150 for residential delivery within 20 miles; longer distances or small loads may cost more. Enter your quoted delivery cost. (4) See total estimate: The calculator shows material cost + delivery + sales tax (if applicable) = total project cost. Cost-saving tips: (1) Order 10+ tons for bulk pricing discounts (10-20% off), (2) Share delivery with neighbors to split fees, (3) Pick up yourself with a trailer if you have access (saves delivery fees but is labor-intensive), (4) Order during off-season (winter) for better pricing. Example estimate: 8 cubic yards crushed stone = ~10.8 tons × $45/ton = $486 materials + $100 delivery = $586 total. Compare quotes from 2-3 suppliers—prices can vary $10-20 per ton between companies.

Gravel delivery costs vary widely based on: (1) Distance from supplier—typically $2-5 per mile beyond a free radius (often 10-20 miles), (2) Load size—smaller loads (<5 tons) may have minimum delivery fees ($75-150), larger loads (10+ tons) often get free or reduced delivery, (3) Accessibility—difficult access (narrow streets, steep slopes, overhead wires) may incur surcharges ($25-75), (4) Delivery type—dump truck delivery ($75-150 standard) vs. conveyor truck for precision placement ($150-300). Typical residential delivery costs: Within 15 miles: $75-125 for 5-15 tons; 15-30 miles: $125-200; 30-50 miles: $200-350+. Some suppliers include free delivery for orders over a certain threshold ($500-1,000 minimum). Cost-saving strategies: Combine orders with neighbors, pick up yourself with a dump trailer (eliminates delivery but requires heavy-duty vehicle and multiple trips), order during off-peak times (mid-week is sometimes cheaper than weekends). Always ask about: Delivery scheduling (can you choose specific time window?), truck size (will it fit your driveway?), placement options (can they dump in multiple piles?), and cancellation/rescheduling policies. Many suppliers offer free delivery quotes—call 2-3 companies to compare.

The best gravel for drainage is clean, angular crushed stone in the 3/4-1 1/2 inch size range with minimal or zero fines (small particles/dust). Specific recommendations: (1) For French drains: Use #57 crushed stone (3/4 inch) or #4 stone (1-1.5 inch)—angular edges create void spaces for water flow while resisting compaction. Must be clean-washed (no fines) to prevent clogging. (2) For surface drainage: Use crusher run or dense-grade aggregate (DGA) which contains fines that help water sheet-flow while base compacts firmly. (3) For retaining wall backfill: Use #8 or #57 stone behind walls with drain pipe at footer level. Why angular stone works best: Angular crushed stone creates 35-40% void space (porosity) compared to 25-30% for rounded gravel—this dramatically improves water flow rate. Avoid for drainage: Pea gravel (rounds trap sediment), limestone (dissolves over time, creates fines), decomposed granite (fines clog pores), any material with high fines content. Critical installation details: (1) Wrap perforated pipe in filter fabric to prevent soil intrusion, (2) Slope drainage runs minimum 1% grade (1 ft drop per 100 ft length), (3) Use non-woven geotextile fabric between soil and gravel to prevent mixing, (4) Ensure outlet is below inlet for gravity flow. The stone itself is only part of the equation—proper installation determines drainage performance.

Dump truck capacity varies significantly by truck type and legal weight limits: (1) Small dump trucks (single-axle): 3-5 tons (typical for residential deliveries, fits narrow driveways), (2) Standard dump trucks (tandem-axle): 10-14 tons (most common for landscape materials), (3) Large dump trucks (tri-axle): 15-20 tons (commercial use, may not fit residential properties), (4) Semi end-dump trailers: 20-25 tons (highway construction, rare for residential). Legal weight limits: Most states limit gross vehicle weight to 36,000-40,000 lbs on residential roads, which means actual gravel payload is typically 10-15 tons maximum. Important considerations: (1) Your driveway access—can a large truck navigate turns, overhead clearance (tree branches, power lines), and ground stability (soft shoulders)? (2) Unloading space—do you have room for the driver to dump safely without blocking roads? (3) Minimum loads—some suppliers require 10-ton minimums for delivery, while others deliver as little as 3 tons with higher fees. Before ordering: Ask your supplier about their truck sizes and whether they can accommodate your site. Taking photos of your driveway entrance, measuring width/height clearances, and discussing with the dispatcher can prevent delivery problems. Many suppliers offer free site assessments for large orders.

Yards-to-tons conversions vary because gravel weight depends on multiple factors: (1) Material type: Lava rock (1,400 lbs/yd³) weighs half as much as decomposed granite (2,800 lbs/yd³)—that's a 100% difference. Rock density varies by mineral composition. (2) Particle size/gradation: Larger stones with more void space weigh less per cubic yard than dense-graded mixes where small particles fill gaps. (3) Moisture content: Wet gravel weighs 10-20% more than dry gravel—water adds significant weight without adding volume. (4) Compaction level: Loose-dumped gravel contains more air gaps than compacted gravel; compacted material weighs more per cubic yard. (5) Contamination: Gravel containing dirt, clay, or organic matter has different density than clean stone. Industry standards vs. reality: Generic online calculators often use 2,700 lbs/yd³ as a default, but your actual supplier's product might be 2,400-3,000 lbs/yd³. A 300 lb/yd³ difference on a 10-yard order equals 1.5 tons—that could mean $60-90 in cost variance. Best practice: Always ask your supplier for their material's specific density (lbs/yd³ or tons/yd³). Many provide technical data sheets with exact weights. Using supplier-verified density ensures your tonnage calculation matches what they'll deliver and charge you for. Our calculator allows custom density input for this exact reason.

For irregular areas, use the divide-and-conquer method: (1) Sketch your area: Draw a simple overhead diagram with approximate measurements. (2) Break into simple shapes: Divide the irregular area into rectangles, triangles, and circles—shapes you can easily measure and calculate. (3) Measure each section: Get length, width, diameter, or base/height for each shape. (4) Calculate each section separately: Use our calculator's Irregular Shapes tab or calculate manually: rectangles (L × W), circles (πr²), triangles (½ × base × height). (5) Add all areas together: Sum the square footage of all sections. (6) Multiply by depth: Convert depth to feet, multiply by total area, then divide by 27 for cubic yards. Example: Kidney-shaped garden bed = one large rectangle (20 ft × 8 ft = 160 ft²) + two half-circles at ends (diameter 8 ft, radius 4 ft, πr² = 50.24 ft² × 2 = 100.48 ft²) = total 260.48 ft² × 0.25 ft depth (3 inches) = 65.12 ft³ ÷ 27 = 2.41 yd³. Pro tips: (1) Round up measurements—better to slightly overestimate than underestimate, (2) Add 15% waste factor for irregular shapes (more edge waste and fitting), (3) Use stakes and string to outline sections before measuring, (4) Take photos with measurements labeled for reference. Our calculator lets you save multiple section calculations and auto-sums them for total project volume.

No. Bagged gravel is 2-4 times more expensive than bulk delivery for projects over 1-2 cubic yards. Cost comparison example: Bagged pea gravel at home improvement stores: $5-8 per 0.5 ft³ bag (0.0185 yd³) = $270-432 per cubic yard. Bulk pea gravel delivered: $50-70 per cubic yard including delivery. For a 5-yard project: Bagged = $1,350-2,160; Bulk = $250-350. When bagged makes sense: (1) Very small projects (<1 yard / <54 bags), (2) No delivery access (narrow gates, apartment balconies), (3) Immediate need (can't wait for scheduled delivery), (4) Specialty colors or decorative stone not available bulk. When bulk is better: (1) Projects >2 yards / >100 bags (the labor of transporting 100+ bags alone makes delivery worth it), (2) You have truck/trailer access to delivery site, (3) You can coordinate timing for delivery. Break-even calculation: Compare (bags needed × price per bag + fuel/vehicle costs) vs. (bulk price per yard × yards needed + delivery fee). Usually bulk wins above 1.5-2 yards even with $100 delivery charges. Hidden costs of bagged: Multiple store trips, vehicle wear, time/labor loading/unloading, potential vehicle damage from overloading, bags tears/waste. Time savings: Unloading 200 bags (5 yards) takes 4-6 hours of heavy labor vs. 5-minute bulk dump. Use our bag calculator to see exact quantities—it often convinces DIYers that bulk is worth it.

Yes, significantly. Wet gravel weighs 10-20% more than dry gravel due to water absorbed in pores and surface moisture. Weight increase by material: (1) Porous stone (lava rock, pumice) can absorb 15-25% water by weight, (2) Dense stone (river rock, crushed granite) absorbs less but surface moisture still adds 8-12%, (3) Angular crushed stone holds water in void spaces between particles, adding 10-15% weight. Practical impact: If you calculated needing 10 tons of dry crushed stone (2,700 lbs/yd³), but it arrives wet after rain, you might receive 11-12 tons on the weight ticket—and be charged accordingly. This is why many suppliers: (1) Store materials under cover or tarps, (2) Provide 'dry ton' pricing with moisture disclaimers, (3) Offer moisture content disclosures on weight tickets. When moisture matters most: (1) Large commercial orders (1% moisture on 100 tons = 1 ton extra cost), (2) Precision engineering projects requiring exact compaction density, (3) Projects priced by weight rather than volume. For typical residential projects: Moisture variation is usually absorbed by the 10% waste factor. If accuracy is critical (e.g., you're paying per certified ton), order during dry weather or negotiate pricing based on dry weight. Storage tip: Gravel delivered wet will drain/dry over 1-2 weeks, reducing weight 8-15%. This is normal settlement and doesn't indicate material shortage. Always use supplier-provided density specifications which typically account for average moisture content (5-10%).

You can DIY if: (1) Project is small (<5 yards / <500 ft²), (2) Ground is relatively level and firm, (3) You have basic tools (rake, shovel, wheelbarrow, tamper), (4) You're physically capable of spreading/compacting 10-15 tons of material, (5) Project is low-stakes (decorative landscaping, simple path). Hire a contractor if: (1) Project is large (>10 yards / driveway), (2) Ground preparation needed (excavation, grading, drainage issues), (3) Subgrade is soft, wet, or unstable (requires geotextile fabric, engineered base), (4) Precision grading or slope required (wheelchair access, water runoff management), (5) Heavy equipment needed (excavator, skid-steer, plate compactor), (6) Permitting required (some municipalities require permits for driveways). Cost comparison: DIY materials for 10-yard driveway: ~$600-800 (gravel + delivery). Professional install: $1,500-3,000 (includes excavation, fabric, compaction, grading). DIY challenges often underestimated: (1) Spreading 10 tons of gravel is brutal physical labor (40-60 hours for novices), (2) Proper compaction requires rented plate compactor ($80-120/day) and technique, (3) Drainage issues can't be fixed after gravel is placed, (4) Uneven base shows through immediately and causes premature failure. Hybrid approach: Many homeowners hire contractors for site prep and base layer (hardest part), then DIY the surface/finish layer (easier, more forgiving). This saves 40-50% vs. full contractor cost while ensuring proper foundation.