Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Civil
Concrete Volume & Mix Calculator
Calculate how many cubic yards of concrete you need for a slab, footing, or pad, including a waste allowance. Use this before ordering ready-mix concrete to avoid costly shortfalls or excess.
Fill in the required fields to see your result.
Civil
Manhole Volume Calculator
Calculates the volume of concrete required to construct a circular manhole wall given the outer diameter, inner diameter, and height. Use it when estimating materials for sewer, drainage, or utility access structures.
Fill in the required fields to see your result.
Key differences
| Concrete Volume & Mix Calculator | Manhole Volume Calculator | |
|---|---|---|
| Category | Civil | Civil |
| Inputs required | 4 | 3 |
| Result | Concrete Volume Needed (cubic yards) | Concrete Volume (m³) |
| What it does | Calculate how many cubic yards of concrete you need for a slab, footing, or pad, including a waste allowance. Use this before ordering ready-mix concrete to avoid costly shortfalls or excess. | Calculates the volume of concrete required to construct a circular manhole wall given the outer diameter, inner diameter, and height. Use it when estimating materials for sewer, drainage, or utility access structures. |