Calculate stockpile volumes, hole fill quantities, material tonnage, and distances. Built by an excavation operator for excavation operators.
Measure your pile, select the shape and material, and get an instant tonnage estimate.
Calculate how much material you need to fill a hole, trench, foundation, or excavation.
Quick unit conversions and area/perimeter calculations for field measurements.
Industry-standard densities for estimating tonnage. Values are typical — actual density varies by moisture, gradation, and source.
| Material | Tons/Yd³ | Lbs/Yd³ | Lbs/Ft³ | Swell % | Compaction % |
|---|---|---|---|---|---|
| EARTH & SOIL | |||||
| Topsoil (loose) | 1.10 | 2,200 | 81 | 25% | — |
| Topsoil (compacted) | 1.45 | 2,900 | 107 | — | 15% |
| Fill Dirt (average) | 1.50 | 3,000 | 111 | 25% | 15% |
| Clay (dry) | 1.40 | 2,800 | 104 | 30% | 20% |
| Clay (wet) | 1.80 | 3,600 | 133 | 30% | 20% |
| Loam | 1.30 | 2,600 | 96 | 25% | 12% |
| AGGREGATE & STONE | |||||
| Crushed Stone / Road Base (loose) | 1.40 | 2,800 | 104 | 15% | — |
| Crushed Stone / Road Base (compacted) | 1.60 | 3,200 | 119 | — | 10% |
| Gravel (loose) | 1.35 | 2,700 | 100 | 15% | — |
| Gravel (compacted) | 1.55 | 3,100 | 115 | — | 12% |
| Sand (dry) | 1.30 | 2,600 | 96 | 12% | — |
| Sand (wet) | 1.60 | 3,200 | 119 | 12% | 5% |
| Limestone | 1.35 | 2,700 | 100 | 15% | 10% |
| Granite / Trap Rock | 1.55 | 3,100 | 115 | 15% | 8% |
| River Rock | 1.50 | 3,000 | 111 | 10% | — |
| Rip Rap (large stone) | 1.65 | 3,300 | 122 | 40% | — |
| RECYCLED & PROCESSED | |||||
| Asphalt Millings | 1.45 | 2,900 | 107 | 20% | 15% |
| Concrete Rubble (broken) | 1.30 | 2,600 | 96 | 35% | — |
| Concrete (wet/mixed) | 2.00 | 4,000 | 148 | — | — |
| Asphalt (hot mix) | 1.65 | 3,300 | 122 | — | 5% |
| Recycled Concrete Aggregate | 1.35 | 2,700 | 100 | 20% | 10% |
| LANDSCAPING | |||||
| Mulch (shredded bark) | 0.40 | 800 | 30 | — | 20% |
| Wood Chips | 0.35 | 700 | 26 | — | 25% |
| Compost | 0.55 | 1,100 | 41 | — | 15% |
| Peat Moss | 0.30 | 600 | 22 | — | 30% |
How smartphone sensors measure distance, volume, and identify materials on the jobsite.
iPhone 12 Pro and later include a dToF (direct Time of Flight) LiDAR scanner that emits infrared laser pulses and measures the return time to calculate distance. Works in any lighting condition including total darkness.
Apple ARKit uses LiDAR + camera fusion to place anchor points in 3D space and measure the distance between them. Tap to set start/end points on any surface — floors, walls, stockpiles, trenches.
Walk around a stockpile capturing LiDAR point cloud data from multiple angles. Software stitches scans into a 3D mesh and calculates volume by comparing the surface to a reference plane (ground level).
Without LiDAR, ARCore/ARKit uses visual-inertial odometry — tracking camera movement and feature points to estimate distances. Place a known reference object (hard hat, shovel) in frame for scale calibration.
Machine learning models (Core ML / TensorFlow Lite) analyze camera images to classify material type — distinguishing topsoil from road base, gravel from sand, and rip rap from river rock based on color, texture, and particle size.
1. Open KERR Measure on your phone. 2. Point camera at stockpile or hole. 3. Walk perimeter for LiDAR scan or manually enter dimensions. 4. AI suggests material type. 5. Get instant tonnage and truck count. 6. Text estimate to dispatcher or client.