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`d = ( 0.25 /(12."in"))* "R" + "W" + "x" `

Enter a value for all fields

The **Pipe Grade** calculator computes the depth at the end of a trench needed for a pipe to be laid with a desired grade.

**INSTRUCTIONS:** Choose units and enter the following:

- (
**G**) Drop per 12" (e.g., 1/8" = 0.125 1/4" = 0.25) - (
**R**) Run of Pipe - (
**W**) Outer width of the pipe - (
**x**) Adder

**Depth of Trench (D)**: The calculator returns the depth in inches. However, this can be automatically converted to compatible units via the pull-down menu.

The depth (d) of the fall is a function of the Run (R) and the grade (G):

d = G/(12 inches) *R

where:

- d = vertical displacement
- G = grade in inches drop per foot
- R = horizontal displacement

The end depth of the trench is:

D = d + W + x

where:

- D = Depth of Trench
- d = drop over the run
- W = outer diameter of the pipe
- x = adder for fittings

**Rolling Offsets (Run and Travel)**– The Rolling Offset**Rolling Offset Lengths**function computes the run and travel length a rolling offset based on the offsets and fittings. (see diagram).**Pipe Grading****Diagonal of a Square**- This is a simple calculation to assist in computing the diagonal of a square.**Diagonal of a Box**- This computes the length of the diagonal of a box (**T**) based on sides of length**R, S**and**U**.**Flow Rate**- This computes flow rate based on the total volume and the time it took to accumulate.**Pipe Flow Volume**- This computes the total volume from a pipe based on the flow rated and the duration of flow.**Weight of Water in a Tank**- Computes the weight of water in a cylindrical tank based on the radius and height (or length).**Weight of Water in a Pipe**- Computes the weight of water or other substances in a pipe based on the dimension and material density.**Weight of Sea Water in pipe**- Computes the weight of sea water in a cylinder based on the radius and height (or length)**Pressure Head**- The Potential Gravity-Fed Water Pressure from a Tank (a.k.a. Pressure Head) based on the height of storage.**Pipe Volume**- Computes the volume in a pipe**Pipe Surface Area**- Computes the surface area of a pipe.**Pipe Coating Volume**- Computes the amount of coating material for a pipe.**Pipe Grading**- Compute the drop needed over a run to maintain a grade (e.g., 4" over 12')**Volume of Water in a Tank**(e.g. hot water tanks),**Volume of a Spherical Container****Weight of Water in a Spherical Container****Volume of Water in Rectangular Tank****Weight of Water in a Rectangular Tank****Capillary Rise**- The height of water in a small tube due to capillary force.**Snow Water Equivalence**- The volume of water created by an area and depth of snow.**Pore Water Pressure**- Pressure of uplift from the water table.