CalcaTools

Tonnage Calculator | Calculate Tonnage From Given Dimensions

Work out how many tons of gravel, topsoil or aggregate you need from the length, width and depth of an area, with the cubic-yard volume shown first. Uses standard material densities and includes the coverage per yard — essential for ordering and budgeting.

Last updated: July 2026 · Free · No sign-up required

Results

Enter values above and click Calculate to see your result instantly.

Quick reference

Coverage depthArea per cubic yard
1 inch324 sq ft
2 inches162 sq ft
3 inches108 sq ft
4 inches81 sq ft
6 inches54 sq ft

info Tonnage Calculator

Free math calculator — enter your numbers and get an instant, accurate result.

info Private by design

Everything runs locally in your browser. No uploads, no accounts, no tracking.

info Works everywhere

Fully responsive and mobile-friendly — calculate on any device, any time.

info Educational

Includes the formula and step-by-step explanation so you understand the math, not just the answer.

Interpretation guide

ResultWhat it tells you
Cubic yardsVolume to order — bulk aggregate tonnage is sold by the cubic yard.
Estimated tonsWeight for by-the-ton pricing (≈ 1.4 tons per cubic yard).
Add 5–10%%Order a little extra for compaction, spillage and uneven ground.

lightbulb Worked example

Let's say you are using the Tonnage Calculator. Tonnage Calculator is a free online calculator that helps you work out tonnage quickly and accurately, right in your browser. Enter the values that match your situation into the input fields and press calculate — using realistic numbers makes the result directly useful for you.

Result: The calculator instantly applies the formula Cubic yards = (Length_ft × Width_ft × Depth_in ÷ 12) ÷ 27; Tons = cubic yards × 1.4 and returns the result with appropriate precision.

What this means: Read the result in the context of what you are measuring. The step-by-step breakdown lets you confirm the math and understand which input most affects the outcome.

Formula & methodology

Formula: Cubic yards = (Length_ft × Width_ft × Depth_in ÷ 12) ÷ 27; Tons = cubic yards × 1.4

How tonnage is calculated

The tool first converts the excavation to cubic yards with Cubic yards = (length × width × depth in inches ÷ 12) ÷ 27, then converts to weight with Tons = cubic yards × 1.4, the typical density of compacted fill and crushed aggregate.

Example: a 20 ft × 10 ft area at 6 inches deep is 20 × 10 × 0.5 ÷ 27 ≈ 3.7 cubic yards, about 5.2 tons.

Reading the result: gravel and fill are sold by the cubic yard in bulk and by weight in some markets — the calculator gives both so the order matches the supplier's unit. Densities vary by material (crushed stone ≈ 1.4 t/yd³, pea gravel ≈ 1.3), and adding 10–15% for compaction and settling is the practical rule before ordering.

Authoritative source: Wolfram MathWorld

Frequently asked questions

How do I calculate cubic yards for aggregate tonnage?
Enter the required values into the input fields and press the calculate button. The tool applies the formula Cubic yards = (Length_ft × Width_ft × Depth_in ÷ 12) ÷ 27; Tons = cubic yards × 1.4 and returns the result with a short explanation of each step, so you can check the working yourself.
How many tons are in a cubic yard of aggregate tonnage?
The Tonnage Calculator is free, private, and accurate: it runs entirely in your browser (no uploads, no accounts), applies the standard calculation, and explains each step so you can verify the result. Tonnage Calculator is a free online calculator that helps you work out tonnage quickly and accurately, right in your browser. There is no limit on usage, and it works on any device.
How much area does one cubic yard cover?
The coverage depends on depth: one cubic yard covers 324 square feet at 1 inch, 162 square feet at 2 inches, and 108 square feet at 3 inches. Divide 324 by the depth in inches to get the coverage. The calculator shows the area coverage alongside the volume and tonnage so you can verify your project sizing at a glance.
Should I order extra aggregate tonnage?
Yes — order about 10–15% extra to account for compaction, settlement, and spreading losses, which typically eat 5–10% of the ordered volume. Suppliers also round to whole yards or half-ton increments, so the practical order is the calculated amount plus the margin. The calculator gives the base tonnage; add the margin and round up when you order.
Is the Tonnage Calculator free to use?
Yes — the Tonnage Calculator. There is no sign-up, no paywall, no trial, and no limit on how many calculations you can run. CalcaTools covers its costs with non-intrusive display advertising, so the calculator itself never asks for payment or restricts any feature.
How do I convert a material volume into tons?
Tons = cubic yards × density (tons/yd³). Typical bulk densities: gravel 1.4, sand 1.35, fill dirt 1.35, topsoil 1.1, concrete 2.0. Ten yards of gravel is therefore about 14 tons — two tandem dump loads. Suppliers quote their own density per product; use theirs when ordering, since moisture alone can swing weight 10%.
What does the Tonnage Calculator do?
Tonnage Calculator is a free online calculator that helps you work out tonnage quickly and accurately, right in your browser. The calculator takes your inputs, applies the standard calculation, and returns a clear result so you can make an informed decision without doing the math by hand.
What formula does the Tonnage Calculator use?
It first converts the excavation dimensions to cubic yards: Cubic yards = (Length_ft × Width_ft × Depth_in ÷ 12) ÷ 27, then converts to weight with Tons = cubic yards × 1.4, the typical density of compacted fill material. Enter the length, width, and depth of the area to order gravel, topsoil, or concrete and get both volume and weight.
Is the Tonnage Calculator free and private?
Yes — it is free with no sign-up or usage limits, and calculations run entirely in your browser so nothing is uploaded. CalcaTools covers its costs with display ads. The tool estimates volume and weight using standard aggregate densities; confirm the specific material density with your supplier before ordering.
How accurate is the Tonnage Calculator?
The Tonnage Calculator applies the standard formula: Cubic yards = (Length_ft × Width_ft × Depth_in ÷ 12) ÷ 27; Tons = cubic yards × 1.4. It is tested against published worked examples before launch and uses native double-precision arithmetic, so results are accurate to typical precision for the values you enter — with no intermediate rounding that could distort the answer.

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