Fill Dirt Calculator

Fill dirt calculation determines the quantity of fill material needed to raise, level, or fill an area for construction and landscaping projects. Fill materials include clean fill dirt, topsoil, gravel, sand, crushed stone, and screened fill. Each material has different characteristics, costs, and applications. Accurate estimation ensures you order the right amount—too little means delayed projects and additional delivery fees, while too much wastes money on unused material.

Fill materials settle when placed and compacted, so the volume you need to order is greater than the final volume in the ground. This compaction factor typically ranges from 25% for most fill materials, meaning you need to order 25% more than the final volume to account for settling. Compaction equipment (plate compactors, rollers) further densifies the material, increasing its load-bearing capacity and reducing future settlement.

This calculator computes the base volume, applies the compaction factor, estimates the total weight and number of delivery trucks, and provides a cost breakdown including material, delivery, and optional compaction equipment rental. It supports six common fill materials with accurate weight and cost estimates.

Fill volume is calculated as length times width times depth, with the depth converted from inches to feet. The compaction factor is then applied to determine the total volume to order.

Different fill materials serve different purposes. The right choice depends on the project requirements, soil conditions, and budget.

Fill dirt should be clean—free of organic material, construction debris, and large rocks that could decompose or create voids over time. Topsoil contains organic matter and is not suitable for structural fill but is essential for growing grass and plants. Gravel and crushed stone provide excellent drainage and load-bearing capacity for driveways and foundations.

Calculate fill material quantities and costs:

1. Enter Area Dimensions: Input the length and width of the area to be filled in feet.
2. Enter Fill Depth: Input the desired fill depth in inches.
3. Select Fill Material: Choose from fill dirt, topsoil, gravel, sand, crushed stone, or screened fill.
4. Select Compaction: Choose Yes if the fill will be compacted (adds 25% extra material) or No for loose fill.
5. View Results: The calculator displays base volume, compaction-adjusted volume, estimated weight, delivery trucks needed, and cost breakdown.

Delivery costs are estimated at $75 per truck for 10-cubic-yard trucks. Compaction equipment rental is estimated at $150 for a plate compactor. Actual costs vary by location and supplier.

The base volume is the geometric volume of the area to be filled, calculated in both cubic feet and cubic yards. The compacted volume (or total needed) is the base volume multiplied by the compaction factor. This is the amount of material you need to order and have delivered to the site.

The estimated weight helps determine if the material can be delivered with standard trucks and whether overweight permits are needed. The delivery trucks are calculated based on 10-cubic-yard dump trucks, which is the standard residential delivery vehicle.

The cost breakdown includes material cost (volume × price per cubic yard), delivery cost ($75 per truck), and optional compaction equipment rental ($150). These costs provide a budget estimate for your project. Actual costs may vary based on location, material availability, delivery distance, and market conditions.

Fill dirt calculations are essential for residential landscaping projects such as raising low areas in yards, creating raised garden beds, leveling sites for patios or sheds, and filling holes or depressions. A typical residential project might require 10-50 cubic yards of fill material.

Construction site preparation often requires significant fill to establish proper building pad elevations, create parking areas, or correct existing grades. These projects may require hundreds or thousands of cubic yards of engineered fill that must meet specific compaction specifications.

Drainage correction projects use fill materials to redirect water flow, create swales, or establish positive drainage away from buildings. Gravel and crushed stone are commonly used for drainage applications because of their excellent permeability and load-bearing characteristics.