HVAC Duct Sizing Calculator vs Pipe Sizing Calculator
Two calculators for the same neighbourhood of questions. Here is what each measures, what you feed in, and where you'd reach for one over the other.
HVAC Duct Sizing Calculator
Calculate the required diameter or dimensions of HVAC ducts based on air flow rate and design velocity. Use this when designing ventilation systems to balance air delivery with noise and pressure loss constraints.
- Answers
- Duct Dimension (inches)
- Inputs
- Air Flow Rate, Design Air Velocity, Duct Shape, Aspect Ratio (for rectangular)
Pipe Sizing Calculator
Find the minimum required pipe diameter to keep fluid velocity within safe limits for a given flow rate. Use this when selecting pipe sizes for new installations or checking whether existing pipes can handle increased flow.
- Answers
- Minimum Pipe Diameter (mm)
- Inputs
- Flow Rate, Maximum Velocity, Safety Factor
At a glance
| HVAC Duct Sizing Calculator | Pipe Sizing Calculator | |
|---|---|---|
| Category | Engineering | Fluid Mechanics |
| Answers | Duct Dimension | Minimum Pipe Diameter |
| Inputs | 4 | 3 |
| Result unit | inches | mm |
When to use each
Calculate the required diameter or dimensions of HVAC ducts based on air flow rate and design velocity. Use this when designing ventilation systems to balance air delivery with noise and pressure loss constraints.
Find the minimum required pipe diameter to keep fluid velocity within safe limits for a given flow rate. Use this when selecting pipe sizes for new installations or checking whether existing pipes can handle increased flow.