10 Inch Duct Calculator
Calculate airflow capacity for 10 inch round ductwork. See CFM ratings at different velocities, recommended applications, and friction loss data for 10" HVAC ducts.
Airflow Capacity for 10" Round Duct
A 10 inch round duct has a cross sectional area of 78.5 square inches (0.545 sq ft). The table below shows the CFM airflow at different air velocities.
| Velocity (FPM) | Airflow (CFM) | Noise Level | Use Case |
|---|---|---|---|
| 600 FPM | 327 CFM | ✅ Quiet | Residential supply |
| 700 FPM | 382 CFM | ✅ Quiet | Residential supply |
| 800 FPM | 436 CFM | ⚠️ Moderate | Commercial supply |
| 900 FPM | 491 CFM | 🔊 May be noisy | Industrial |
Recommended Applications
Bedrooms, offices, standard residential supply branches
At the standard residential friction rate of 0.08 in/wg per 100 feet, a 10 inch duct is ideal for delivering 382 CFM at a quiet 700 FPM velocity.
Quick Duct Sizing Formula
CFM for 10" Duct
CFM = (π/4) × (10/12)² × Velocity At 700 FPM: CFM = 0.5454 × 700 = 382 CFM