Heat Exchanger, Coil & Radiator Manufacturing calculator

Tube Length Usage Calculator

Use this calculator to size tube footage for a build before purchasing or cutting. It converts tube count and cut length into required material, including the yield impact from scrap, trim, setup pieces, or rejected tubes.

What this calculator does

  • Estimate tube footage required for coils, radiators, condensers, evaporators, oil coolers, or tube bundles from tube count, cut length, and usable yield.
  • Use it before releasing a job, buying tube, or staging cut lengths when a shortage would stop finning, bending, expansion, brazing, or assembly.
  • Converts tube quantity, cut length, and usable yield into a required tube footage for production or purchasing.

Formula used

  • Required tube footage = tubes required × cut length per tube ÷ usable tube yield
  • Tube loss allowance = required footage - theoretical footage

Inputs explained

  • Tubes required: undefined
  • Cut length per tube: undefined
  • Usable tube yield: undefined

How to use the result

  • Use it for material release, cut list planning, supplier purchase quantities, and quote checks on copper, aluminum, stainless, or carbon steel tubes.
  • It does not optimize nesting, coil pack sizes, minimum order quantities, or tube wall thickness. Add purchasing rules and inventory constraints separately.

Common questions

  • What does the required tube footage include? It includes theoretical tube footage plus the extra footage implied by your usable yield. That yield should reflect trim, setup scrap, handling damage, leak failures, and rejected tubes.
  • Should bends and header stubs be included in cut length? Yes, include the full cut length consumed by the tube blank if it will be purchased or cut from stock. Do not use only the exposed heat transfer length unless that is the material you are buying.
  • How should purchasing use the result? Use the result as the planning footage, then round to supplier coil weight, tube bundle length, pack quantity, or internal stocking rules.
  • When can the estimate be low? It can be low when a new tube diameter, wall thickness, alloy, bend radius, or expansion setup increases scrap compared with the historical yield entered here.

Last reviewed 2026-05-12.