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Calcimator

Stretch Wrap Calculator

Film rolls needed from pallet count and wrap method.

About this calculator

Stretch wrap consumption comes down to a simple geometric fact: each pass of film around a pallet covers its perimeter, and you need enough vertical passes to cover the full load height, repeated for however many wrap revolutions (bottom-to-top cycles) you specify. This calculator computes the pallet's perimeter from its length and width, divides load height by film width to get the number of passes needed per revolution (rounded up, since a partial pass still consumes a full width of film), and multiplies by revolutions to get total linear film per pallet. That's then measured against your roll's usable length, which the calculator adjusts upward by your pre-stretch percentage — pre-stretching mechanically elongates the film before it wraps the load, so a machine wrapper running 200–300% pre-stretch gets far more linear coverage out of the same physical roll than hand-wrapping at 0%.

Dividing pallets needed by pallets-per-roll and rounding up to the next whole roll — because a partially used roll still has to be opened and paid for as a full unit — gives total rolls, and the calculator estimates each roll's weight and cost by scaling a reference roll (80 gauge, 18 inches wide, 1,500 feet, about 7.5 lbs) proportionally to your actual gauge, width, and length. The main lever for cutting film cost without sacrificing load stability is increasing pre-stretch ratio, which uses less raw film per pallet for the same number of wraps — but pre-stretch also affects film's holding force and puncture resistance, so don't push it past your load's stability requirements just to save on film.

Inputs

in
in
in
in
ft
%

Results

Rolls needed

5

Pallets per roll

11.4

Film per pallet (ft)132
Effective roll length (ft)1,500
Weight per roll (lbs)8.3
Total film weight (lbs)41.7
Film cost per pallet ($)$2.08
Total film cost ($)$104.17
How to Use This Calculator
  1. Enter pallet dimensions (L x W x H in inches) and number of pallets per day.
  2. Enter stretch wrap gauge (80-150 gauge) and roll width (inches).
  3. Enter wraps per pallet and desired film overlap percentage.
  4. Read film consumption per pallet (linear ft), rolls per day, and annual film cost.
  5. Optimize by increasing pre-stretch ratio — higher pre-stretch reduces film usage per pallet.

How the result changes with Number of pallets

Number of palletsRolls neededPallets per roll
25311.4
38411.4
75711.4
1251111.4

What each input means

Number of pallets
Total pallets to be wrapped.
Pallet length (in)
Pallet deck length (standard GMA = 48 in).
Pallet width (in)
Pallet deck width (standard GMA = 40 in).
Load height (in)
Height of the stacked load on the pallet.
Wrap revolutions
Number of full wrap cycles bottom-to-top (3 is standard for stable loads).
Film width (in)
Width of the stretch film roll (18 or 20 in is standard).
Roll length (ft)
Linear feet of film per roll (1000-1500 for hand, 5000-9000 for machine).
Pre-stretch %
Pre-stretch ratio (0% for hand wrap, 200-300% for machine stretch wrappers).

What each result means

Rolls needed
Total stretch film rolls required.
Pallets per roll
How many pallets one roll can wrap.
Film per pallet (ft)
Linear feet of film consumed per pallet.
Effective roll length (ft)
Usable film length after pre-stretching.
Weight per roll (lbs)
Estimated weight of each film roll.
Total film weight (lbs)
Combined weight of all film rolls needed.
Film cost per pallet ($)
Estimated film cost per wrapped pallet.
Total film cost ($)
Estimated total stretch film cost.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Number of pallets = 50, Pallet length (in) = 48, Pallet width (in) = 40, Load height (in) = 60 = 8 input(s) provided
  2. Calculate Rolls needed
    Rolls needed
    5 = 5
  3. Calculate Pallets per roll
    11.4 = 11.4
  4. Calculate Film per pallet
    Film per pallet = filmPerPalletIn / 12
    132 = 132
  5. Calculate Effective roll length
    Effective roll length = rollLengthFt * stretchMultiplier
    1500 = 1500

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.

Frequently Asked Questions

Why does increasing pre-stretch percentage reduce the number of rolls I need?

Pre-stretch mechanically elongates the film before it wraps the load, so the calculator multiplies your roll's stated length by (1 + preStretchPct / 100) to get effectiveRollLengthFt — the actual usable linear footage that roll delivers once stretched. A roll rated at 1,500 ft with 250% pre-stretch behaves like 5,250 ft of usable film, which wraps far more pallets per roll than the same physical roll used unstretched.

How does load height affect film consumption if I'm not changing the number of wrap revolutions?

Load height determines passesPerRevolution — loadHeight divided by film width, rounded up because a partial pass still consumes a full width of film — and that pass count multiplies directly into filmPerPalletIn along with pallet perimeter and revolutions. A taller load needs more vertical passes to cover the same number of revolutions, so film usage scales with height even when everything else stays fixed.

Why does the calculator estimate roll weight and cost from a single reference roll instead of asking me for those directly?

It scales a known reference point — an 80 gauge, 18-inch-wide, 1,500 ft roll weighing about 7.5 lbs — proportionally by the ratios of your actual gauge, width, and roll length to that reference. This lets it estimate weight and an approximate $2.50/lb material cost for any roll specification you enter without needing a full product-specific price lookup, though your supplier's actual pricing may vary from this per-pound estimate.

Is there a downside to pushing pre-stretch as high as possible to minimize film cost?

The calculator only models film consumption, not load stability — pre-stretch also affects the film's holding force and puncture resistance, and pushing it too high for a given load can reduce wrap integrity even though it lowers the film-usage numbers this tool reports. Treat the pre-stretch input as a cost lever to balance against your load's actual stability needs, not something to maximize blindly.

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