Aggregate/Gravel Volume Calculator

width

length

thickness

Types of aggregates

Unit weight

ton/㎥

Compaction rate (surcharge]

Please check.

Since the volume of aggregate decreases by 10 to 20 percent during the compaction process after laying, a markup rate (compaction rate] must be taken into account to prevent a shortage of materials during construction.
If you lay gravel directly on the soil, it will become buried in the soil and weeds will grow over time, so please lay down geotextile non-woven fabric first to prevent material loss and maintain drainage performance.
Since aggregate suppliers typically sell by weight (ton] rather than volume (㎥], it is most accurate to proceed with consultation and ordering based on the final tonnage calculated by a calculator.
It is standard practice on site to construct simple pedestrian walkways with a thickness of 50 to 70 mm, and vehicle access roads with a minimum thickness of 150 to 200 mm to prevent ground subsidence.
For small orders, transportation costs (dump trucks/trucks] can exceed material costs, so it is essential to identify the locations of nearby aggregate suppliers and the accessibility of large vehicles in advance to ensure economic efficiency.

How about this calculator?

Aggregate/Crushed Stone Calculator, Guide to Calculating Cubic Meters (㎥] and Tonnes (ton] of Crushed Stone, Gravel, and Sand

We accurately calculate the quantities of gravel and sand required for country house yard landscaping or parking lot paving. We support perfect quantity calculations by considering the unique compaction rates and unit weights of the aggregates.

Formula for calculating aggregate and stone requirements

First, calculate the volume (cubic meters], then reflect the specific gravity of each material and the volume reduction during compaction (surcharge] in the calculation.

1. Calculation of Volume (㎥]

Volume (㎥] = Width (m] × Length (m] × Thickness (m]

2. Calculation of Final Required Weight (ton]

Total weight (ton] = Volume × Unit weight × (1 + Markup rate/100]

Since the volume decreases during compaction, it is important to usually leave a margin of 10 to 20 percent.

Detailed Guide to Calculator Input Items

Please check the actual measurement reference values below for accurate calculations.

1. Packaging Area & Thickness
A thickness of 50~70mm is recommended for pedestrian walkways and 150~200mm for vehicle parking lots.
2. Select Aggregate Type
Select mixed aggregate for foundations and crushed stone for finishes. Specific gravity is applied automatically.
3. Compaction Surcharge Rate
Since aggregates shrink in volume when compacted, it is standard practice to leave a margin of 10 to 20 percent.

Standard Unit Weight Table by Aggregate Type

The actual weight (tons] to be ordered varies depending on the density of the selected material.

Types of materials	Unit weight (ton/㎥]	Main uses and features
Mixed aggregate (40mm]	1.70 ~ 1.85	For road subbase and foundation compaction (heaviest]
Crushed stone/Crushed stone (25mm]	1.50 ~ 1.65	Parking lot paving, yard finishing (rainwater drainage]
River gravel/pea gravel	1.60 ~ 1.70	For landscaping, drainage, and interior use (round shape]
Sand	1.45 ~ 1.60	For plastering, masonry, pipeline protection, and jointing

note.

Specific gravity may vary slightly depending on site conditions and moisture content.

Essential Checklist for Fail-Free Construction

This is an essential checklist from experts for creating defect-free floors.

Resolutions are essential
After laying, you must compact it with a vibratory roller or compactor to prevent ground subsidence.
Pre-installation of civil engineering non-woven fabric
If you lay it directly on the soil, weeds will grow and gravel will get buried, so be sure to lay down the non-woven fabric first.
Select the size suitable for your needs
40mm mixed aggregate is suitable for the foundation, and 25mm crushed stone is suitable for the yard finish.

Frequently Asked Questions (FAQ]

Q. How many tons is 1 cubic meter (㎥] of aggregate?
A. Typically, it is calculated at 1.6 to 1.7 tons per cubic meter.

Q. How much can be loaded onto one dump truck?
A. A 15-ton dump truck can load approximately 10㎥ (16~17 tons], and a 25.5-ton dump truck can load approximately 16~17㎥.

Q. Why do I have to order more than the calculated amount?
A. Since the volume decreases by 10–20% upon compaction, it is more economical to order 1.1–1.2 times the amount from the start.