砾石计算器
计算庭院、车道、小径和景观项目所需的豌豆砾石用量。输入区域尺寸和深度，即时获得立方码、吨数、袋数和费用估算。支持矩形、圆形和自定义形状区域，可调整损耗系数。
Frequently Asked Questions
我需要多少袋豌豆砾石？
先计算总体积（立方英尺 = 长×宽×深/12），然后除以每袋体积（通常0.5立方英尺/袋）。例如10×8英尺区域，深2英寸：总体积 = 10×8×2/12 = 13.3立方英尺，需要约27袋（0.5立方英尺/袋）。
豌豆砾石应该铺多厚？
铺设厚度建议：步行路径2-3英寸（5-7.5cm）；装饰性景观边缘1.5-2英寸（4-5cm）；停车区3-4英寸（7.5-10cm）；儿童游乐区4-6英寸（10-15cm，需足够缓冲）；植物根部护盖2-3英寸。过薄稳定性差，过厚行走困难且浪费材料。
豌豆砾石有什么用途？
豌豆砾石的常见用途：步行路径和车道；花坛边缘装饰；水景和干河床景观；游乐场安全地面；水族箱底床；混凝土聚合料；户外烧烤区防火地面；植物根部保湿护盖。豌豆砾石圆润无尖角，触感舒适，适合儿童活动区。
豌豆砾石和普通砾石有何不同？
豌豆砾石：直径约6-10mm的小圆石，表面圆润光滑，天然磨蚀而成，无棱角，颜色多样（棕、米、白、灰）。普通碎石：人工破碎，有锐利棱角，颗粒大小不一（12-75mm），稳定性更强，适合承重基础。豌豆砾石更适合装饰和步行区，碎石更适合车道基层和结构用途。
多少磅或吨的豌豆砾石能覆盖我的区域？
豌豆砾石密度约1,600-1,700 kg/m³（100-105磅/立方英尺）。计算：重量（磅）= 面积（平方英尺）× 深度（英寸）/ 12 × 100。例如100平方英尺，深2英寸：100 × 2/12 × 100 ≈ 1,667磅（约0.75吨）。一般家庭小工程约需0.5-2吨。
豌豆砾石需要固定剂或地布吗？
步行路径建议：铺设前先夯实基土，垫5-8cm碎石基层，再铺豌豆砾石，四周用边缘挡板（金属、木材或塑料）防止扩散。地布可减少杂草但影响排水；若更关注排水，不铺地布更好。可用砾石固定剂（聚合物粘合剂）局部固定，适合高流量区域。
如何计算曲线或不规则形状区域的豌豆砾石用量？
不规则区域计算：圆形：面积 = π × r²（r为半径）；椭圆形：面积 = π × a × b（a、b为半径）；复杂形状：分割成简单形状（矩形、三角形）分别计算再相加；或测量区域最大长度和宽度，乘以0.8（经验系数，考虑不规则因素）。建议多订购10-15%以备边缘补充。
豌豆砾石多久需要补充？
豌豆砾石会因以下原因减少：车辆或行人将砾石带出区域、雨水冲刷（尤其坡地）、自然沉降（约10-15%/年）、植物根系分解导致体积减小。通常每1-2年需要补充约5-10cm厚度。每次清洁（去除杂草和落叶）后评估是否需要补充，保持美观效果。
豌豆砾石适合车道吗？
豌豆砾石可用于轻型车辆车道，但有局限性：优点：价格低廉、排水好、外观美观。缺点：圆润颗粒在车辆行驶时容易位移和分散，需要频繁重新铺平；不适合坡道（容易滑落）；车辆轮胎会将砾石带出。车道更推荐使用有棱角的碎石（如3/4英寸碎石），稳定性更好；豌豆砾石更适合装饰性车道边缘而非主要行车区。
如何清洁豌豆砾石？
定期清洁方法：用耙子（砾石耙）平整表面并清除落叶杂草；春秋季节深度清洁：用网筛筛出泥土和小颗粒杂质；高压水枪冲洗（适合小面积）；人工拣出大型杂物；添加少量新砾石补充流失部分。注意：不要使用除草剂（会渗入土壤）；可在砾石下铺透水膜减少维护频率。
豌豆砾石比混凝土或沥青便宜吗？
豌豆砾石通常是最便宜的铺地材料之一：豌豆砾石约25-45元/平方米（含铺设）；混凝土约80-150元/平方米；沥青约60-100元/平方米；混凝土砖/石板约100-300元/平方米（视材料而定）。豌豆砾石初始成本最低，但长期维护成本（需定期补充和平整）可能超过混凝土。对于低流量装饰区域，豌豆砾石是极佳的经济选择。
Pea Gravel Calculator: Complete Guide to Estimating Tons, Yards & Bags
The Pea Gravel Calculator helps you determine exactly how much pea gravel to order for patios, driveways, walkways, drainage systems, and landscaping projects. It computes volume in cubic yards, weight in tons, the number of bags needed, and an estimated cost based on material properties and project specifications.
Table of Contents
How to Use the Pea Gravel Calculator
- Select the area shape — rectangular, circular, or enter a custom area directly.
- Enter dimensions — length and width for rectangles, diameter for circles, in feet, meters, or yards.
- Set the gravel depth — in inches or centimeters. See the depth guide below for recommendations.
- Choose a material density — preset (loose or compacted gravel, gravel with sand, dry/wet sand) or enter a custom density.
- Select a bag size — to calculate how many bags you need (0.5 cu ft, 1 cu ft, or 50 lb bags).
- Enter pricing (optional) — per cubic yard, ton, bag, or other unit for cost estimation.
- View results — volume in cubic yards/feet/meters, weight in tons/pounds/kg, bags needed, and estimated cost.
Recommended Pea Gravel Depth by Project Type
The right depth depends on the application. Below are industry-standard recommendations:
| Project Type | Recommended Depth | Notes |
|---|---|---|
| Patio / Seating area | 2–3 inches | Comfortable underfoot; compact base first |
| Walkway / Pathway | 2–3 inches | Use edging to prevent spreading |
| Driveway | 3–4 inches | Over 4–6" compacted crushed stone base |
| Drainage / French drain | 4–6 inches | Around perforated pipe; use washed gravel |
| Playground surface | 6–9 inches | CPSC recommends 9" for fall heights up to 7 ft |
| Decorative ground cover | 2 inches | Around plants over landscape fabric |
| Dog run / Pet area | 2–3 inches | Easy to clean; good drainage |
Pea Gravel Volume Calculation
The calculator determines volume based on the coverage area and required depth:
Rectangular Area:
Circular Area:
Common volume conversions:
- 1 cubic yard (yd³) = 27 cubic feet (ft³)
- 1 cubic meter (m³) = 35.3147 cubic feet (ft³)
- 1 cubic foot (ft³) = 28.3168 liters (L)
How to Calculate Bags of Pea Gravel
Home improvement stores sell pea gravel in bags rather than bulk. The most common bag sizes are:
| Bag Size | Volume | Weight | Bags per Cubic Yard |
|---|---|---|---|
| 0.5 cu ft bag | 0.5 ft³ | ~50 lb | 54 |
| 1 cu ft bag | 1.0 ft³ | ~100 lb | 27 |
Formula:
Always round up to the nearest whole bag. Our calculator includes wastage automatically.
Cost tip: Bagged pea gravel costs $4–$8 per 0.5 cu ft bag, which works out to $216–$432 per cubic yard. Bulk delivery from a landscape supplier typically costs $25–$75 per cubic yard. For projects requiring more than 1–2 cubic yards, buying in bulk saves 70–80% on material costs.
Pea Gravel Density and Weight Reference
Standard Pea Gravel Densities:
| Material | State | lb/ft³ | kg/m³ | Tons/yd³ |
|---|---|---|---|---|
| Pea Gravel | Loose | 95 | 1,522 | 1.28 |
| Pea Gravel | Compacted | 110 | 1,762 | 1.49 |
| Gravel with Sand | Loose | 100 | 1,602 | 1.35 |
| Gravel with Sand | Compacted | 120 | 1,922 | 1.62 |
Weight calculation formula:
Pea Gravel Cost Guide
Average Pea Gravel Prices (2025–2026):
| Purchase Method | Price Range | Best For |
|---|---|---|
| Bulk per cubic yard | $25–$75 | Large projects (driveways, patios >100 sq ft) |
| Bulk per ton | $30–$60 | Heavy-weight orders; sold by weight at quarries |
| Bagged (0.5 cu ft) | $4–$8 per bag | Small projects, touch-ups, filling containers |
| Delivery fee | $50–$150 | Flat rate for local delivery (varies by distance) |
| Installed (labor + material) | $1–$3 per sq ft | Professional installation with grading and edging |
Prices vary by region, supplier, and quantity. Specialty colors (white, black, red) cost 50–100% more than natural mixes. Always get quotes from at least two local suppliers.
Worked Examples
Example 1: 12x12 Patio at 3" Depth
- Area = 12 × 12 = 144 ft²
- Depth = 3 inches = 0.25 ft
- Volume = 144 × 0.25 = 36 ft³ = 1.33 yd³
- Weight = 36 × 95 = 3,420 lb = 1.71 tons
- Bags needed = 36 / 0.5 = 72 bags (0.5 cu ft size)
- With 10% wastage: 79 bags or 1.47 yd³
- Bulk cost at $45/yd³ = ~$66 + delivery
- Bagged cost at $5/bag = ~$395
Example 2: 20x40 Driveway at 4" Depth
- Area = 20 × 40 = 800 ft²
- Depth = 4 inches = 0.333 ft
- Volume = 800 × 0.333 = 266.7 ft³ = 9.88 yd³
- Weight = 266.7 × 95 = 25,333 lb = 12.67 tons
- With 10% wastage: 10.87 yd³ or ~13.93 tons
- Bulk cost at $45/ton = ~$627 + delivery
Example 3: 8-foot Circular Fire Pit Surround at 2" Depth
- Diameter = 8 ft, Radius = 4 ft
- Area = π × 4² = 50.27 ft²
- Depth = 2 inches = 0.167 ft
- Volume = 50.27 × 0.167 = 8.39 ft³ = 0.31 yd³
- Weight = 8.39 × 95 = 797 lb = 0.40 tons
- Bags needed = 8.39 / 0.5 = 17 bags (0.5 cu ft size)
Pea Gravel vs Other Aggregates
| Feature | Pea Gravel | Crushed Stone | River Rock | Decomposed Granite |
|---|---|---|---|---|
| Size | 1/8–3/8" | 1/4–2" | 1–3" | Fine to 1/4" |
| Shape | Rounded | Angular | Rounded | Irregular, fine |
| Compaction | Poor | Excellent | Poor | Good |
| Drainage | Excellent | Good | Excellent | Moderate |
| Walk comfort | Good | Rough | Uneven | Good (packed) |
| Cost/yd³ | $25–$75 | $20–$60 | $40–$120 | $30–$70 |
| Best for | Patios, paths, landscaping | Driveways, bases, structural | Decorative, dry creek beds | Pathways, rustic look |
When Not to Use Pea Gravel
- Sloped areas without edging — pea gravel migrates downhill easily due to its round shape.
- Structural foundations — rounded stones do not interlock; use crushed stone or gravel base instead.
- Areas near pool drains — small stones can clog drains and filtration systems.
- Snow removal zones — plows and shovels scatter pea gravel; use compacted crushed stone for snowy climates.
- High-heel traffic areas — heels sink between stones. Use pavers or flagstone instead.
- Under concrete or pavers as base — pea gravel shifts under load. Use crusher run (#411) for base material.
Wastage Factor
A wastage factor of 5–15% is recommended to account for:
- Settling and compaction during the first weeks after installation
- Uneven ground surface variations
- Loss during transportation and spreading
- Edge and corner fill requirements
- Natural migration of stones away from the project area
Use 10% for most projects. Use 15% for uneven terrain, sloped areas, or projects without hard edging.
Unit Conversions for Pea Gravel Calculations
Area Conversions:
- 1 square yard (yd²) = 9 square feet (ft²)
- 1 square meter (m²) = 10.7639 square feet (ft²)
Depth Conversions:
- 1 inch (in) = 2.54 centimeters (cm)
- 1 foot (ft) = 12 inches (in)
Weight Conversions:
- 1 short ton = 2,000 pounds (lb)
- 1 metric ton (tonne) = 2,204.62 pounds (lb)
- 1 kilogram (kg) = 2.20462 pounds (lb)
Related Tools
- Pipe Volume Calculator— calculate water volume in pipes for drainage and irrigation projects.
- Plant Spacing Calculator— plan plant layouts for landscaping projects alongside gravel areas.
- Scale Factor Calculator— convert between blueprint measurements and actual project dimensions.