Home » Simplify your calculations with ease. » Industrial » Fill Power Calculator

Fill Power Calculator

Show Your Love:

The Fill Power Calculator helps textile manufacturers, bedding designers, outdoor gear brands, and consumers check the loft quality of down insulation used in jackets, sleeping bags, and comforters. Fill power shows how much space one ounce of down can fill when fully expanded. Higher fill power means better insulation and fluffiness with less weight. This tool removes confusion by giving an accurate number based on real measurements. It belongs to the Textile Quality and Insulation Performance Calculator category and supports quality checks and product comparisons.

formula of Fill Power Calculator

Fill Power = Volume Filled by 1 Ounce of Down

See also  Seal Coating Estimate Calculator Online

Expressed as:
Fill Power (in³/oz) = Volume (in³) / Weight (oz)

Where:
Volume is the measured expand volume the down occupies under standard lab conditions, in cubic inches
Weight is the weight of the down sample in ounces

For standard tests, the down is place in a cylinder and lightly compressed with a weight to check how much air it traps and how high it lofts.

Common Fill Power Ratings Reference Table

This table shows typical fill power ratings for down products so you can compare your calculated results and choose the right insulation.

Fill Power (in³/oz)Down Quality LevelTypical Use Case
400–450Entry LevelGeneral bedding, budget jackets
500–550Mid RangeEveryday outdoor gear
600–700High QualityLightweight jackets, sleeping bags
700–800PremiumHigh-end sleeping bags, ultralight jackets
800+Ultra PremiumExpedition-grade gear, luxury bedding

Higher fill power means less down is needed for the same warmth, which reduces weight and bulk.

See also  Gas Spring Mounting Position Calculator Online

Example of Fill Power Calculator

Let’s see a simple example step by step.

You test a down sample that weighs 1 ounce and expands to fill 650 cubic inches.

  1. Use the formula:
    Fill Power = Volume / Weight
    Fill Power = 650 / 1 = 650 in³/oz

So, the fill power of this down sample is 650, which is high quality and good for warm but lightweight jackets or sleeping bags.

Most Common FAQs

Is higher fill power always better?

Generally yes, but it depends on the use. Higher fill power is lighter and more packable but often costs more. For heavy-duty bedding or casual wear, mid-range fill power might be enough and more affordable.

How is fill power measured?

Fill power is measured in labs using a standardized cylinder and a small weight that compresses the down. This shows how much space the down fills at a set pressure, giving a consistent value for comparison.

Leave a Comment