How Much Pipe Insulation for 75 Feet of Pipe?

75 ft of pipe takes 16 tubes of 6 ft foam pipe insulation, for one pipe size with 15 elbows and tees. That is 75 ft of run plus 6 in of extra tube at each fitting and 10% for cutting, 90.8 ft in all, rounded up to whole tubes.

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This calculator needs JavaScript. Turn it on to enter your own numbers. The example result on this page is worked out for the typical job shown in the form, and the formula and worked example below let you check it by hand.

Length of 1/2 in pipe

Add up the runs you can reach: basement ceilings, crawl spaces, garages, outside walls.

Elbows and tees on the 1/2 in pipe

fittings

Length of 3/4 in pipe

Leave at 0 if you have no 3/4 in pipe. Each pipe size is counted on its own.

Elbows and tees on the 3/4 in pipe

fittings

Length of 1 in pipe

Elbows and tees on the 1 in pipe

fittings

Extra tube for each elbow or tee

An angled cut at an elbow or a notch at a tee uses a little more tube than the straight run. 6 in is a starting guess: change it to suit your fittings.

Length of one tube (printed on the package)

Read it off the package; every tube of one product is the same length.

Extra for cutting

Cut ends and mistakes.

Results

Example job shown. Change the numbers to match yours.

Tubes to buy in all

16 tubes

Rounded up for each pipe size, tubes of 6 ft

Tubes for each pipe size

For 1/2 in pipeBuy 16 tubes of 6 ft: 16 tubes
For 3/4 in pipeNone needed: 0 tubes
For 1 in pipeNone needed: 0 tubes

Lengths worked out

1/2 in pipe with fittings and extra: 90.8 ft
3/4 in pipe with fittings and extra: 0.0 ft
1 in pipe with fittings and extra: 0.0 ft
Pipe to insulate: 75.0 ft

Each pipe size needs its own tube size, because the hole in the tube has to fit the outside of the pipe. Check the tube size on the package against your pipe, since copper, PEX and iron pipes of the same nominal size have different outside diameters. This tool counts tubes only: it makes no claim about thickness, R-value or how much protection from freezing you get.

Before you buy: round up to whole packs, check the size printed on the label, and add a little spare. Your supplier has the final say.

Blueprint

75 ft · 16 tubes

75 ft of pipe, by tube length

For one pipe size with 15 elbows and tees at 6 in of extra tube each and 10% for cutting, which is 90.8 ft of tube. Read the tube length off your package.

Length of one tube	Tubes to buy
3 ft	31
4 ft	23
6 ft	16
8 ft	12

75 ft of pipe, by number of fittings

6 ft tubes, 6 in of extra tube for each elbow or tee, 10% for cutting.

Elbows and tees	Tube length needed	Tubes to buy
0	82.5 ft	14
15	90.8 ft	16
30	99.0 ft	17

How much the fittings add

On a long run the elbows and tees start to count. For 75 ft at 6 in of extra tube for each: with no fittings it needs 14 tubes, with 15 fittings 16 tubes, and with 30 fittings, a run that turns a lot, 17 tubes.

Count the fittings as you measure, since they are easy to miss once you are in a crawl space. If your elbows take more tube than 6 in, change the allowance in the calculator: at 12 in each, 15 fittings bring 75 ft to 17 tubes.

For which pipes to insulate first and what to do in a cold snap, see how to keep pipes from freezing.

Want to change anything else? The calculator above is the full Pipe Insulation Calculator: Foam Tubes to Buy: edit any number and the results update instantly.

Tools & materials for this project

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Cable ties Faucet cover

Frequently asked questions

How much pipe insulation do I need for 75 feet of pipe?

90.8 ft of tube, or 16 tubes of 6 ft, for 75 ft of one pipe size with 15 elbows and tees at 6 in each and 10% extra. With no fittings it is 14 tubes.

How many 6 ft tubes for 75 feet of pipe?

16, with 15 elbows and tees at 6 in each and 10% extra (90.8 ft).

How much extra tube for an elbow?

The calculator starts at 6 in for each elbow or tee, a starting guess for the angled cut. Change it to suit your fittings.

Related sizes and guides

Estimates only. Results assume standard materials and simple shapes. Supplier products vary, and the final call on quantity, structure and safety is yours. Check your local code and your supplier's guidance before ordering.