Triangular Prism Volume
Multiply the cross-sectional area by the length. Anything with a constant cross-section is simply area times length.
Your numbers
Volume
480cm³
Area
24cm²
Litres
0.48L
Formula
Volume = Base × Height ÷ 2 × Length
Useful for the space under a pitched roof or a triangular prism package.
What to enter
| Input | Default | Accepted range |
|---|---|---|
| Base (cm)The side you treat as the bottom when finding area. | 8 | 0 and up |
| Height (cm)The perpendicular height from the base — not the slanted side. | 6 | 0 and up |
| Length (cm)The measurement across, side to side. | 20 | 0 and up |
Step by step
Quick reference table
Results when only Base (cm) changes and everything else stays put.
| Base (cm) | Volume (cm³) | Area (cm²) | Litres (L) |
|---|---|---|---|
| 4 | 240 | 12 | 0.24 |
| 6 | 360 | 18 | 0.36 |
| 8 | 480 | 24 | 0.48 |
| 12 | 720 | 36 | 0.72 |
| 16 | 960 | 48 | 0.96 |
What each result means
| Result | At default values |
|---|---|
| Volume (cm³)The space a solid holds — length cubed. | 480 |
| Area (cm²)The space a shape covers — length squared. | 24 |
| Litres (L)Capacity in litres; one litre is 1,000 cm³. | 0.48 |
Common mistakes
Useful for the space under a pitched roof or a triangular prism package.
Glossary
- Base
- The side you treat as the bottom when finding area.
- Height
- The perpendicular height from the base — not the slanted side.
- Length
- The measurement across, side to side.
- Volume
- The space a solid holds — length cubed.
- Area
- The space a shape covers — length squared.
- Litres
- Capacity in litres; one litre is 1,000 cm³.
Frequently asked questions
Q. How is Triangular Prism Volume calculated?
Volume = Base × Height ÷ 2 × Length — Multiply the cross-sectional area by the length. Anything with a constant cross-section is simply area times length.
Q. Can you walk through an example?
With Base 8cm, Height 6cm, Length 20cm, the answer is Volume 480cm³.
Q. What do I need to enter?
Enter Base, Height, Length. The result recalculates as you type, and an empty box counts as zero.
Q. How much does the answer move if I change a number?
Changing only Base (cm) moves the answer to Base (cm) 4 → Volume (cm³) 240 and Base (cm) 16 → Volume (cm³) 960. The table below lays out five steps.
Q. How are the numbers rounded?
Money is shown to the nearest whole unit, percentages to one decimal place and everything else to two. What you see is rounded; the calculation itself carries the unrounded value forward.
Q. Anything to watch out for?
Useful for the space under a pitched roof or a triangular prism package.
Related calculators
Keep your length units consistent across inputs — mixing centimetres and metres throws results far off.