PTFE rod weight calculator
Enter the dimensions of a PTFE rod and this works out its volume and weight. Virgin polytetrafluoroethylene: by far the densest common plastic.
- Weight of one rod
- 1.079 92
- Volume of one piece
- 490.874
- Weight per metre of length
- 1.079 92 kg/m
- Density used
- 2200 kg/m3
Show the working
- Diameter = 25
- Length = 1000
- Number of pieces = 1
- volume_mm3 = pi * (25/2)^2 * 1000 = 490 874
- Volume of one piece = 490 874 / 1000 = 490.874
- Density used = 2200 = 2200
- Weight of one rod = 490 874 * 2200 / 1e9 = 1.079 92
- Total weight = 1.079 92 * 1 = 1.079 92
- Weight per metre of length = 490 874 / 1000 * 1000 * 2200 / 1e9 = 1.079 92
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
Scenarios & local history
Compare a saved scenario
Recent calculations
The formula
- Volume = pi x (diameter / 2)^2 x length
- Weight = volume x density, with density = 2200 kg/m3
- One cubic millimetre of a material at 1000 kg/m3 weighs exactly one milligram, so the millimetre-to-kilogram step is a shift of the decimal point rather than a rounded factor.
Virgin polytetrafluoroethylene: by far the densest common plastic.
Dimensions are nominal. Mill tolerances on thickness, and the corner radii on formed sections, both move the real weight by a percent or two.
Every field takes inches or feet as readily as millimetres: change the unit next to it and the conversion is done exactly before the arithmetic starts.
Frequently asked
What is the density of PTFE?
2200 kg/m3, which is 2.200 g/cm3. Virgin polytetrafluoroethylene: by far the densest common plastic.
How do you calculate the weight of a PTFE rod?
Volume = pi x (diameter / 2)^2 x length. Multiply the volume by the density of PTFE, 2200 kg/m3, taking care that both are in the same unit system.
Can I enter dimensions in inches?
Yes. Each dimension field has its own unit selector, and inch, foot, millimetre, centimetre and metre entries are all converted exactly before anything is multiplied.
Where the numbers come from
- Densities are nominal room-temperature values for the grade named, drawn from the usual mill and handbook figures.