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`M = L*W*D*mD`
Enter a value for all fields
The Weight of a Water in Rectangular (Cuboid) Tank calculator computes the weight of water in a tank based on the length and width of the tank and the depth of the water in the tank. (see diagram).
INSTRUCTIONS: Choose units and enter the following:
- (L) Length of Tank
- (W) Width of Tank
- (D) Depth of water in Tank
Weight of Water (M): The volume is returned in gallons. However, this can be automatically converted into many other volume units (e.g. cubic feet, gallons, litres) via the pull-down menu.
The Math / Science
The formula for the weight of water in a cuboid is:
M = L • D • W • mD
where:
- M is the mass or weight of the cubiod.
- L is the length of the cuboid.
- D is the depth of the cuboid.
- W is the width of the cuboid.
- mD is the density of water
Plumbing Calculators
- Rolling Offsets (Run and Travel) – The Rolling Offset
Rolling Offset Lengths 
Pipe Grading function computes the run and travel length a rolling offset based on the offsets and fittings. (see diagram). - 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 Amount - Computes the volume of coating material for a pipe such as paint, polyethylene, polyurethane, zinc, bitumen, FBE or mortar.
- 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.
- Pipe Stress Budget - Computes the pressure that a pipe can withstand based on the allowable stress, wall thickness and outside diameter.