Free Gravel Calculator – Accurate Tons & Yards
Calculate the exact gravel volume and weight required for any project—from residential driveways, garden walking paths, and patio sub-bases to commercial parking lots and drainage systems. Input your dimensions below to receive instant calculations in cubic feet, cubic yards, and tons, complete with material density adjustments and compaction buffer planning.
- Yards & TonsDual Volume & Weight
- 10+ Stone TypesPea, Crushed & River
- +10% BufferCompaction Fluff Protection
- 100% FreeInstant No-Sign-Up Math
Result
The volume is 6,000.0 liters
- Cubic Meters6.00 m³
- Cubic Yards7.85 yd³
- Cubic Feet211.9 ft³
The weight is approximately 10,080 kg
- Metric Tons10.08 t
- Pounds22,223 lbs
- Short Tons11.11 ton
How Much Gravel Do I Need?
Gravel is a three-dimensional aggregate material calculated using volume: Length (ft) × Width (ft) × Depth (ft) = Total Cubic Feet. Because aggregate suppliers sell gravel by volume or weight, convert your cubic feet into Cubic Yards (divide by 27) and multiply by material density (approximately 1.4 tons per cubic yard for standard crushed stone).
To avoid running short during installation, always add a 10% compaction buffer to account for gravel settling, wheel packing, and ground leveling.
Weight Formula: Cubic Yards × 1.4 = Estimated Tons
Sample Driveway: 20 ft × 10 ft × 3 in (0.25 ft) = 50 cu ft ÷ 27 = 1.85 cu yds ≈ 2.59 Tons
How to Use the Gravel Calculator
Follow these simple steps to ensure you order the precise tonnage without wasteful surplus or costly shortfalls:
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1. Measure Your Project Area
Measure the total length and width in feet or meters. For irregular spaces (such as kidney-shaped garden beds or winding paths), break the layout into smaller manageable rectangles, calculate each section individually, and sum the results.
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2. Determine Your Desired Depth
Depth is the most critical variable in aggregate longevity. A layer that is too thin will sink into the subsoil within months, while an overly deep layer can cause vehicle tires to sink or bicycle wheels to bog down. (Review our Depth Reference Guide below).
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3. Select Your Material Type
Different aggregates feature different specific gravities. While volume (cubic yards) stays constant, weight (tons) shifts between lightweight pea gravel (~1.3 tons/yd³) and dense crushed limestone with fines (~1.5–1.6 tons/yd³).
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4. Apply the 10% Compaction Buffer
Freshly poured loose gravel settles significantly under rainwater and vehicle traffic. We recommend applying our built-in 10% “fluff buffer” to compensate for sub-grade undulations and mechanical compaction.
Pro Tip: When ordering bulk quarry delivery, round up to the nearest half-ton or full yard. Quarreled stone is always cheaper to order in one shipment than ordering a secondary emergency load.
Types of Gravel: Choosing the Right Aggregate
Using the proper aggregate grade guarantees optimal drainage, structural stability, and surface aesthetics. Review ASTM aggregate specifications for commercial standard grading.
1. Bank Gravel
Natural Sand & Stone MixBank gravel is excavated directly from riverbanks and quarries without heavy screening. It contains natural sand and clay particles that pack together firmly, creating maximum stability for heavy sub-grade foundations.
2. River Stone
Water-Washed Rounded StoneNaturally smoothed by riverbeds over centuries, river rocks offer an upscale, organic finish in shades of tan, slate grey, and russet red. Their round contours allow unobstructed water flow without trapping silts.
3. Pea Gravel
Small Rounded 3/8″ AggregatePea gravel consists of small, smooth pebbles approximately the size of a green pea. Extremely comfortable underfoot, it is perfect for casual walking paths, dog runs, and patio fill, but rolls under car wheels.
4. Crushed Stone
Angular Interlocking StoneUnlike natural stone, quarry-crushed limestone or granite has sharp, angular edges. When rolled or machine-compacted, these angles interlock tightly, forming a rigid, non-rutting load-bearing pavement.
5. Play Gravel
Washed & Screened Safety StoneSpecifically screened to filter out jagged rocks, oversized chunks, and fine rock powders. Offers safe impact attenuation in children’s recreational areas, dog daycares, and drainage bedding.
Quick Density Rule
Estimating TonnageWhen exact quarry test data is unavailable, professional contractors multiply total cubic yards by 1.4 Tons for safe ordering coverage.
Where Are You Installing Your Gravel?
Installation methods differ significantly based on your site requirements and load expectations:
Construction & Foundations
Structural SupportGravel acts as a capillary break underneath concrete slabs, preventing ground moisture from seeping upward. It ensures a stable, frost-resistant base that won’t shift under seasonal ground movement.
Landscaping & Gardens
Weed Defense & BeautyFor decorative garden beds, mulching with gravel retains ground moisture and provides thermal insulation without rotting or needing annual replacement like wood bark.
Drainage & Stormwater
French Drains & AgricultureDrainage trenches and permeable driveways prevent catastrophic flood runoff. Refer to the EPA permeable pavement guidelines for stormwater management.
Recommended Gravel Depth Guide
Using the correct depth prevents weed penetration while ensuring maximum structural integrity:
| Project Application | Recommended Depth | Recommended Aggregate | Engineering Rationale |
|---|---|---|---|
| Decorative Garden Bed | 2 – 3 Inches (5–8 cm) | River Rock or Pea Gravel | Adequately conceals weed barrier fabric without creating bulky rock mounds. |
| Pedestrian Walking Path | 3 – 4 Inches (8–10 cm) | Pea Gravel or Crushed Granite | Provides cushioned, quiet footsteps while concealing the sub-soil layer. |
| Residential Driveway | 4 – 6 Inches (10–15 cm) | Crushed Stone with Fines | Crucial depth required to handle vehicular load without tire rutting. |
| Heavy Commercial Parking | 6 – 12 Inches (15–30 cm) | Layered Crushed Limestone | Requires multi-layer installation: heavy ballast base plus compacted topcoat. |
| French Drain Trench | 12+ Inches (30+ cm) | Washed Drainage Stone | Surrounds perforated pipe entirely to channel fast-flowing stormwater. |
Metric Gravel Coverage Estimates
Quickly calculate required cubic meters for common area sizes at varying depth levels:
| Coverage Area (m²) | At 3 cm Depth (Approx 1.2″) | At 4 cm Depth (Approx 1.6″) | At 5 cm Depth (Approx 2.0″) |
|---|---|---|---|
| 10 sq meters | 0.30 Cubic Meters (0.42 t) | 0.40 Cubic Meters (0.56 t) | 0.50 Cubic Meters (0.70 t) |
| 50 sq meters | 1.50 Cubic Meters (2.10 t) | 2.00 Cubic Meters (2.80 t) | 2.50 Cubic Meters (3.50 t) |
| 100 sq meters | 3.00 Cubic Meters (4.20 t) | 4.00 Cubic Meters (5.60 t) | 5.00 Cubic Meters (7.00 t) |
| 500 sq meters | 15.00 Cubic Meters (21.0 t) | 20.00 Cubic Meters (28.0 t) | 25.00 Cubic Meters (35.0 t) |
Pro Tips for Accurate Gravel Ordering
Real-world ground conditions differ from textbook geometry. Always account for these three installation factors:
The “Fluff” & Settle Factor
Loose gravel delivered from a quarry settles noticeably after rainfall and wheel compaction. Adding a 10% buffer ensures your finished driveway remains at true grade rather than sinking an inch low.
Sub-Grade Irregularities
If your base soil has ruts, tree root depressions, or slope variations, gravel will fill those low points first. Level your base with a skid-steer or shovel before measuring for your final surface layer.
The Edge Migration Buffer
Without heavy steel or stone borders, gravel naturally migrates toward turf borders. Ordering an extra 0.5 yards provides maintenance material for perimeter touch-ups after the initial month.
Frequently Asked Questions About Gravel Calculation
Everything you need to know about aggregate volume, weight, delivery, and installation.
How much gravel do I need for my driveway vs. my garden?
Driveways require significantly more material because they must support vehicular loads without shifting. A garden typically needs 2–3 inches (5–8 cm) of decorative stone, whereas a driveway requires 4–6 inches (10–15 cm) of compacted crushed stone over a prepared base to prevent potholes and rutting. Toggle the “Depth” setting in our calculator to match your specific application.
Can you use the gravel calculator for all aggregates?
Yes! Whether you are installing limestone, granite, river rock, lava rock, crushed concrete, or pea gravel, the volume (cubic yards or cubic meters) remains mathematically identical. However, the weight in tons will vary depending on the stone’s density. For heavy limestone, multiply by 1.4–1.5 tons/yd³; for lightweight volcanic rock, multiply by 1.0–1.1 tons/yd³.
Does gravel size affect coverage?
While mathematical volume remains constant, visual coverage changes with rock diameter. Larger stones (such as 2–3 inch river rock) leave larger voids between stones, requiring a deeper overall layer to ensure the ground fabric underneath is completely concealed. Smaller 3/8-inch pea gravel packs tightly and provides complete surface coverage at shallower depths.
How much is a yard of gravel?
Prices vary depending on geographic quarry access and stone variety. Standard crushed limestone typically costs between $30 and $65 per cubic yard, while specialty decorative river pebbles or marble chips can range from $75 to $130 per yard. To get the best price, calculate your total yards here and request a bulk quarry quote rather than buying 50-lb retail bags.
Do you deliver gravel in bulk?
While our calculator is 100% free for project estimation, we recommend contacting local aggregate quarries or landscape supply yards in your municipal area for bulk tandem truck delivery (typically 10 to 18 tons per dump truck load). Ordering direct quarry truckloads is substantially cheaper than home improvement retail stores.
How do I choose between pea gravel and crushed stone?
Choose based on foot vs. tire traffic. If you plan to drive or park vehicles on it, choose Crushed Stone because its sharp angular edges interlock under weight. If you are building a patio or walkway where people will walk barefoot or in sandals, choose smooth Pea Gravel or River Stone.
Measure Twice, Order Once
A few moments with our free Gravel Calculator can save you hundreds of dollars in excess aggregate freight charges and hours of manual labor. Get your exact yards and tons right now.
Launch Gravel CalculatorBookmark this tool with Ctrl + D (⌘ + D on Mac) for instant access on the job site.