Ducts - Cross-Sectional Area vs. Diameter
Circular ducts sross-sectional areas.
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Circular ventilation ducts and cross-sectional areas - Imperial Units
| Duct Diameter | Area | ||
|---|---|---|---|
| (in) | (mm) | (ft2) | (m2) |
| 8 | 203 | 0.3491 | 0.032 |
| 10 | 254 | 0.5454 | 0.051 |
| 12 | 305 | 0.7854 | 0.073 |
| 14 | 356 | 1.069 | 0.099 |
| 16 | 406 | 1.396 | 0.130 |
| 18 | 457 | 1.767 | 0.164 |
| 20 | 508 | 2.182 | 0.203 |
| 22 | 559 | 2.640 | 0.245 |
| 24 | 609 | 3.142 | 0.292 |
| 26 | 660 | 3.687 | 0.342 |
| 28 | 711 | 4.276 | 0.397 |
| 30 | 762 | 4.900 | 0.455 |
| 32 | 813 | 5.585 | 0.519 |
| 34 | 864 | 6.305 | 0.586 |
| 36 | 914 | 7.069 | 0.657 |
Circular ventilation ducts and cross-sectional areas - Metric Units
| Duct Diameter | Area | ||
|---|---|---|---|
| (mm) | (m2) | (mm2) | (in2) |
| 63 | 0.003 | 3019 | 4.7 |
| 80 | 0.005 | 4902 | 7.6 |
| 100 | 0.008 | 7698 | 11.9 |
| 125 | 0.012 | 12076 | 18.7 |
| 160 | 0.020 | 19856 | 30.8 |
| 200 | 0.031 | 31103 | 48.2 |
| 250 | 0.049 | 48695 | 75.5 |
| 315 | 0.077 | 77437 | 120 |
| 400 | 0.125 | 125036 | 194 |
| 500 | 0.196 | 195565 | 303 |
| 630 | 0.311 | 310736 | 482 |
| 800 | 0.501 | 501399 | 777 |
| 1000 | 0.784 | 783828 | 1215 |
| 1250 | 1.225 | 1225222 | 1899 |
Download and print Circular Air Ducts Cross Sectional Area chart.
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