Example engineering calculations
Worked, unit-aware calculation worksheets across structural, mechanical, electrical and more. Open any example into your own workspace to edit and reuse. New to Calculeaf? Start with your first worksheet or the examples guide.
34 examples found
Sanitary Sewer Pipe Capacity (Manning Conveyance)
Full-flow capacity of a sanitary sewer pipe from its conveyance factor and slope.
Water Treatment Tank Detention Time
Hydraulic detention time of a water treatment tank at a given flow rate.
Chlorine Dosing Rate for Water Disinfection
Mass feed rate of chlorine needed to achieve a target dose in a flowing water stream.
Reservoir Storage Volume from Area and Depth
Approximate storage volume of a reservoir from its surface area and average depth.
Rainfall Intensity from an IDF Power-Law Curve
Design storm rainfall intensity from an intensity-duration-frequency (IDF) power-law curve.
Time of Concentration (Kirpich Method)
Watershed time of concentration from the empirical Kirpich formula.
Land Parcel Area from Coordinates (Shoelace Formula)
Enclosed area of a land parcel from its boundary corner coordinates using the shoelace formula.
Elevation Difference by Trigonometric Leveling
Elevation difference between two survey points from a measured slope angle and instrument/target heights.
Earthwork Volume by the Average End Area Method
Cut or fill volume between two survey cross sections using the average end area method.
Concrete Mix Volume by the Absolute Volume Method
Total batch volume of a concrete mix from the absolute (solid) volumes of its ingredients, adjusted for entrained air.