AirPods Pro Adaptive Transparency: What It Is

Adaptive Transparency is a feature on AirPods Pro (2nd generation) that automatically reduces loud noises in your environment while still letting you hear what’s around you. Instead of simply blocking all outside sound like standard noise cancellation, it lets in everyday sounds—conversations, traffic, announcements—but instantly lowers the volume of sudden loud bursts, such as a jackhammer or a car horn. You turn it on in your iPhone’s Bluetooth settings, and it works continuously while you wear the earbuds.

Formula

The calculator above computes the volume of material needed to fill a rectangular area to a given depth. The formula is:

Volume (cubic yards) = Length (ft) × Width (ft) × Depth (in) ÷ 324

Where:

Length – the longer side of the rectangle, in feet.
Width – the shorter side of the rectangle, in feet.
Depth – how deep you want the material, in inches.

The divisor 324 comes from converting inches to feet (12) and then cubic feet to cubic yards (27): 12 × 27 = 324.

For cubic feet, the formula is simply Length × Width × Depth ÷ 12.

Worked Example

Using the default values from the calculator (length = 40 ft, width = 25 ft, depth = 3 in):

Convert depth to feet: 3 in ÷ 12 = 0.25 ft
Calculate volume in cubic feet: 40 × 25 × 0.25 = 250 ft³
Convert to cubic yards: 250 ÷ 27 = 9.26 yd³ (rounded to 2 decimals)

The calculator gives 9.26 cubic yards, which matches. For cubic feet, it shows 250 ft³ directly.

When to Use This Calculator

Use this calculator when you need to order soil, mulch, gravel, sand, or concrete for a rectangular area. It’s also handy for estimating how much fill dirt you need to raise a garden bed or level a lawn. The result tells you the volume to purchase, but remember that suppliers often sell in whole cubic yards, so you’ll need to round up to the next full yard.

If your area isn’t a perfect rectangle, divide it into rectangles, calculate each, and add the volumes together. For irregular shapes, consider using a more precise method or consult a professional.

How to Read the Result

The first output, Volume (yd³), is the amount you’d order from a bulk supplier. For example, 9.26 cubic yards means you need at least 10 cubic yards if you can only order whole yards. The second output, Volume (ft³), is useful for smaller projects where you might buy bagged material (which is often sold in cubic feet).

Keep in mind that volume doesn’t account for compaction. Loose soil or gravel settles after being spread, so you may need extra material—typically 10–20% more—depending on the material and how much you compact it.

Common Mistakes

Mixing units: Always convert all measurements to the same unit before calculating. The calculator handles the conversion, but if you do it by hand, don’t mix feet and inches.
Forgetting depth is in inches: The formula uses depth in inches, not feet. If you enter depth in feet, the result will be off by a factor of 12.
Not rounding up: When ordering bulk material, you can’t order 9.26 cubic yards—you order 10. Always round up to avoid running short.
Ignoring waste: Spills, uneven ground, and mistakes happen. Add a small buffer (5–10%) to your order.

Limitations of the Formula

This formula assumes a perfectly flat, rectangular area with uniform depth. Real-world sites often have slopes, curves, or varying depths. For those, the calculation is an estimate. Also, the formula doesn’t account for material properties like moisture content or compaction, which can change the actual volume needed. For critical projects, consult a landscape supplier or civil engineer.

Frequently Asked Questions

How many cubic feet are in a cubic yard?

There are 27 cubic feet in one cubic yard (3 feet × 3 feet × 3 feet). This is why the conversion factor in the formula is 27.

Can I use this for circular or triangular areas?

No, this calculator is only for rectangles. For a circle, use the formula π × radius² × depth. For a triangle, use (base × height / 2) × depth. Then convert to cubic yards by dividing by 27.

What if I need the volume in liters or cubic meters?

Convert the result: 1 cubic yard = 0.7646 cubic meters, and 1 cubic foot = 28.317 liters. So for 9.26 yd³, that’s about 7.08 m³ or 7,080 liters.

How much does a cubic yard of topsoil weigh?

It varies by moisture and composition, but dry topsoil typically weighs about 2,000–2,700 pounds per cubic yard. Wet soil can be heavier. For weight-based ordering, check with your supplier.

Should I order more than the calculator shows?

Yes, it’s wise to add 5–10% for waste and compaction, especially for soil or gravel. If you’re filling a planter or raised bed, you might not need extra, but for ground-level projects, a buffer helps.

Formula used

in l | Lawn length | ft | 40 | 0 | 100000
in w | Lawn width | ft | 25 | 0 | 100000
in d | Depth | in | 3 | 0 | 120
out yd | Volume | yd³ | l * w * d / 324 | 2
out ft3 | Volume | ft³ | l * w * d / 12 | 1

Each line is one input (in, sel, list) or one result (out: label, unit, formula, decimals). How the calculators work

Method: the standard formula for this calculation, rounded as each result states. See how the calculators work or report an error.

More in this bed

The whole Tech How-To bed →