Civil engineering calculations
Civil Calcs puts seven everyday civil engineering calculations in your pocket, and draws each one as you work. Change a value and the answer, the drawing and every readout update at once. There is no calculate button.
Solve Manning's equation for an open channel (a trapezoid, rectangle or V-ditch) or a circular pipe flowing part full, for whichever value is unknown: the discharge, the depth, the slope, the roughness, or the size of the channel or pipe.
The section is drawn to scale with the water in it, and the equation is written out under it with your numbers in it, so the arithmetic can be checked at a glance. Velocity, Froude number, full-flow capacity and the peak flow just below full read out beside it.
Enter a vertical curve as it appears on a profile sheet: the PVI, the grades in and out, and the length. Civil Calcs finds the BVC and EVC, the high or low point, K and the middle ordinate, the elevation at any station, and a station table you can export.
For a straight grade, give any three of start elevation, end elevation, grade and length, and get the fourth, with an elevation table for a ditch, a pipe run or a driveway.
Run a traverse course by course, turning angles right, deflections or deed bearings, and watch it plot as you go. Closure, precision, area and a compass-rule adjustment come with it, all kept in double precision so state plane coordinates hold every digit.
The area table gives the area of any lot from its corner coordinates, in square feet and acres or square meters and hectares, with the bearing and distance of every side. Bring a traverse straight across, and export the points for CAD.
Tap a key for each vehicle on a drawn intersection, for all twelve movements and U-turns. The 15-minute totals, the peak hour and the peak hour factor follow, and every vehicle exports with its time.
No account, no ads, no tracking and no network. Every calculation runs on your device, and your work stays there. The Privacy Policy has the details.
Questions, bug reports and feature requests: support@jaredjudd.com. It helps to include your device, its iOS version, the calculator you were using and the values you entered.
No. There is no sign-in. Everything you enter stays on your device.
Yes, always. Civil Calcs never goes online. Every calculation runs on your device.
Manning's equation with k = 1.486 in US customary units and 1 in SI; the equal-tangent parabolic vertical curve; areas by coordinates; the compass (Bowditch) rule for traverse adjustment; and the peak hour factor as the peak hour's volume over four times its busiest quarter hour. Calculations run in double precision.
No. Civil Calcs 4.0 is an update to the same app, so it comes to you as one.
Your work goes with your device backup. Restoring a backup to the new phone restores Civil Calcs with it. Exported CSV files are wherever you saved them.
Delete the app. Civil Calcs keeps nothing anywhere else.
Civil Calcs is a tool for checking and planning. Confirm its results against your project's standards and a licensed professional's judgment before you build from them. An area from coordinates is not a boundary survey. See the Terms of Use.