以下详细说明暂以英文提供。
Volume first, then weight
Aggregates are measured on site as an area and a depth but sold by the cubic yard or the ton, so the calculation runs length × width × depth into cubic feet, divides by 27 for yards, then multiplies by density. Sand is the heavy one here at roughly 1.43 tons per yard; damp sand after rain can weigh noticeably more, which is worth remembering when a delivery truck needs to cross your driveway.
Bags or a bulk delivery?
Tick the bag box to see the same volume in half-yard bulk bags, which suit small patches and jobs where a dump truck cannot reach. The math flips quickly though: anything past three or four bags is usually cheaper by the yard, and suppliers that deliver loose material often beat bagged pricing by a wide margin on anything more than a single afternoon of shoveling.
中国本地参考
日常计算时值得知道的中国本地规则：
- 计量的单位习惯: 住房面积用平方米，土地常用亩（1 亩 ≈ 666.7 平方米）；里程用公里，油耗用 L/100km。
- 日期与数字格式: 日期写作 2026年10月13日（年-月-日）；大数习惯用万、亿（1 万 = 10,000，1 亿 = 100,000,000）。
- 法定节假日: 全年法定节假日 11 天，春节与国庆为长假；调休安排每年由国务院办公厅发布。
- 速度与限速: 高速公路最高限速 120 km/h，城市快速路多为 80 km/h，均以公里每小时计。
- 鞋服尺码: 鞋码用中国码（毫米制），服装常用 155/80A 这类身高围度组合，与欧美码不同。
数据核对：2026 年 10 月
常见问题
How deep should sand under pavers be?
Plan on a one-inch layer of coarse bedding sand over four to six inches of compacted gravel base. This calculator covers each layer separately — enter the same area with each material and depth.
How much sand does a sandbox need?
Six inches is a comfortable play depth. A 8×8 foot sandbox at that depth works out to about 32 cubic feet, or roughly 1.2 cubic yards — the depth selector handles the rest.
Why does the weight matter?
Suppliers quote and deliver by the ton, and pickups are rated by payload too — a half-ton truck swallows about a yard of sand at most. Weight is the number that keeps both the invoice and the suspension honest.