Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

This is an AMP page - Open full page! for all features.

the most efficient way to navigate the Engineering ToolBox!

Ducts - Cross-Sectional Area vs. Diameter

Circular ducts sross-sectional areas.

Sponsored Links

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

Area Converter

Download and print Circular Air Ducts Cross Sectional Area chart.

Sponsored Links

Related Topics

Ventilation - Systems for ventilation and air handling - air change rates, ducts and pressure drops, charts and diagrams and more.

Related Documents

Circular Ducts - Dimensions - Standard size of circular ventilation air ducts.
Duct Velocity - Calculate velocities in circular and rectangular ducts - imperial and SI-units - online calculator.
Ducts Sizing - the Velocity Reduction Method - The velocity reduction method can be used when sizing air ducts.
Equivalent Diameter - Rectangular vs. Circular HVAC Ducts - Rectangular equivalent diameter for air flows between 100 - 50000 cfm.
Fluid Flow - Equivalent Diameter - Convert rectangular and oval duct geometry to a equivalent circular diameter - online calculator with imperial and SI-units.
Fluid Flow - Hydraulic Diameter - Calculate hydraulic diameter for pipes and ducts.
Rectangular Ducts - Dimensions - Commonly used metric dimensions for rectangular air ducts in ventilation systems.

Sponsored Links

Share

Search Engineering ToolBox

the most efficient way to navigate the Engineering ToolBox!

SketchUp Extension - Online 3D modeling!

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!

About Engineering ToolBox!

Contact - Citation - Copyrights - Advertising - Warranty and Liability

Privacy

We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.

Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.

Google use cookies for serving our ads and handling visitor statistics. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected.

AddThis use cookies for handling links to social media. Please read AddThis Privacy for more information.

Advertise in the ToolBox

If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. You can target the Engineering ToolBox by using AdWords Managed Placements.