What is a cubic foot?

A cubic foot is the volume of a cube measuring one foot on each side. It is used for storage, shipping, landscaping, and building materials.

Can I mix input units?

Yes. Each dimension has its own unit selector. Values are converted to feet internally before calculating total volume.

How accurate are the results?

Accuracy depends on input quality and chosen precision. For irregular shapes or rounded measurements, consider a safety factor.

What shapes are supported?

Rectangular box, cylinder, sphere, cone, and rectangular pyramid. Outputs include ft³, yd³, in³, m³, and liters.

What if I have dimensions in centimeters?

Select centimeters from the dropdowns. The calculator converts centimeters to feet automatically, then computes cubic feet.

Can I export my results?

Yes. Buttons let you export the main results or example table as CSV or PDF for records.

Will this work for landscaping materials?

Yes. Compute volume in ft³, and convert to yd³ or liters for mulch, gravel, or soil.

Cubic Feet Calculator — Advanced Volume Tool

Calculator

Shape

Precision (decimals)

Auto-calc

Recalculate on change

Length

Width

Height

Tip: You can mix units per dimension. The tool converts every input to feet before calculating volume.

Results

Metric	Value
Total volume (ft³)	—
Total volume (yd³)	—
Total volume (in³)	—
Total volume (m³)	—
Total volume (liters)	—

Values round to selected precision.

Example Data Table

Sample scenarios you can tweak. Click "Recalculate" after edits.

#	Scenario	Shape	Dim A	Unit A	Dim B	Unit B	Dim C	Unit C	Volume (ft³)
1	Storage room	box	12	ft	10	ft	8	ft	—
2	Water tank	cylinder	48	in (diam)	6	ft (h)	—	—	—
3	Playground sphere	sphere	3	ft (diam)	—	—	—	—	—
4	Traffic cone	cone	2	ft (diam)	3	ft (h)	—	—	—

Formula Used

All inputs are first converted to feet. Let ft(x, u) convert a value x in unit u to feet.

Rectangular box: V = L × W × H where each term is in feet.
Cylinder: V = π r² h using radius r and height h in feet.
Sphere: V = 4/3 π r³ using radius in feet.
Right circular cone: V = 1/3 π r² h.
Rectangular pyramid: V = 1/3 L × W × H.

Conversions from ft³ to other outputs: yd³ = ft³ / 27, in³ = ft³ × 1728, m³ = ft³ × 0.028316846592, liters = m³ × 1000.

How to Use This Calculator

Select a shape and set decimal precision.
Enter dimensions, choosing appropriate units for each field.
Enable “Auto-calc” for instant updates or click Calculate.
Read the result table for ft³ and other unit conversions.
Use the example table for quick what‑if scenarios.
Download results or examples as CSV or PDF for records.
Review formulas to verify calculations and assumptions.

Cubic Feet Conversion Factors

Conversion	Value
1 ft³ in cubic yards	0.037037 yd³
1 ft³ in cubic inches	1,728 in³
1 ft³ in cubic meters	0.028316846592 m³
1 ft³ in liters	28.316846592 L
1 ft³ in US gallons (liq.)	≈ 7.48051948 gal
1 yd³ in cubic feet	27 ft³
1 m³ in cubic feet	≈ 35.3146667 ft³

Values are rounded for readability. Use higher precision when needed.

Typical Material Weights per Cubic Foot (approx.)

Material	Density (lb/ft³)	Weight of 1 ft³ (lb)	Notes
Water	≈ 62.4	≈ 62.4	Fresh water near 4 °C.
Concrete (normal weight)	145–150	≈ 147.5	Mix and aggregates affect value.
Gravel	95–105	≈ 100	Moisture content changes weight.
Dry sand	95–110	≈ 100	Varies with grain size, packing.
Topsoil	75–100	≈ 85	Organic matter and moisture vary.
Mulch (wood chips)	15–30	≈ 22	Species, chip size, and moisture.
Ice	≈ 57	≈ 57	At ~0 °C; less than water.

Use ranges as planning estimates. Verify with suppliers when exact weight matters.

FAQs

A cubic foot is the volume of a cube measuring one foot on each side. It is commonly used for storage, shipping, landscaping, and building materials.

Yes. Each dimension includes its own unit selector. The calculator converts every value to feet before computing the volume.

Results are as accurate as your inputs and selected precision. For irregular shapes or rounded measurements, consider adding a safety margin.

Rectangular box, cylinder, sphere, right circular cone, and rectangular pyramid. All results are reported in cubic feet with additional unit conversions.

Choose centimeters in the unit dropdowns. The calculator converts centimeters to feet internally, then computes volume in cubic feet.

Yes. Use the Download CSV and Download PDF buttons to export the main results or the example table for documentation.

Yes. Calculate volume in cubic feet, then convert to cubic yards or liters as needed for mulch, gravel, or soil estimation.