Rice Bag Size from Filling Weight + Denier

Rice Bag Length & Width from Filling Weight

in kilograms
kg per liter

Reference Guide

  • Bulk Density of Rice: Weight per liter of rice. White/parboiled rice ≈ 0.80–0.90 kg/L. Determines how much space a given weight occupies.
  • Aspect Ratio H:W: Ratio of fill height (H) to flat width (W). Higher ratio = taller, slimmer bag.
  • Headspace (top) %: Extra height left unfilled for sealing. Expressed as % of fill height.
  • Top Hem Allowance: Extra cloth folded at the top seam (usually 3–5 cm).
  • Bottom Fold Allowance: Extra cloth folded or stitched at the base (2–4 cm typical).
  • Denier: Fiber thickness (grams per 9000 m of yarn). Higher denier = stronger fabric.
  • EPI (Ends per inch): Warp yarns per inch in fabric width. Affects strength & GSM.
  • PPI (Picks per inch): Weft yarns per inch in fabric length. Works with EPI to set fabric density.

How to Use the Rice Bag Size Calculator

This tool calculates the dimensions of a bag based on the weight of rice it needs to hold and the fabric properties.

Step 1: Input Your Bag Specifications

Fill in all the required fields in the calculator form:

  • Units: Choose between centimeters (cm) or inches (in).
  • Rice Filling Weight: Enter the net weight of rice the bag will hold, in kilograms (e.g., 5, 10, 25, 50).
  • Bulk Density of Rice: Enter the weight per liter for your rice type. A common value is 0.85 kg/L for white rice.
  • Aspect Ratio H:W: Enter the desired ratio of the bag’s filled height to its flat width. A ratio of 1.6 is typical.
  • Headspace (top) %: Enter the percentage of extra space left at the top for sealing (e.g., 12%).
  • Top Hem Allowance: Enter the additional length needed for the top seam or hem, in your chosen units.
  • Bottom Fold Allowance: Enter the additional length needed for the bottom fold or seam.
  • Denier: Enter the thickness of the fabric yarn (e.g., 7000).
  • EPI (Ends per inch): Enter the number of warp threads per inch.
  • PPI (Picks per inch): Enter the number of weft threads per inch.

Step 2: Calculate the Results

Click the “Calculate Length & Width” button.

Step 3: Review the Results

The results section will appear below the button, showing:

  • Flat Width: The calculated width of the flat, empty bag.
  • Fill Height: The height the rice will occupy inside the bag.
  • Total Cut Length: The full length of fabric needed to make the bag, including all allowances.
  • Estimated GSM: The calculated fabric weight in grams per square meter.
  • Bag Empty Weight: The estimated weight of the empty bag in grams.
Artisanal jasmine rice in a woven polypropylene bag on a rustic wooden table.

Frequently Asked Questions: Rice Bag Size Calculator

How does the calculator determine bag size?
The calculator uses the rice weight and density to find the volume. It then applies a cylindrical model with your chosen aspect ratio to calculate the fill height and width, finally adding your hem and headspace allowances.

What is a typical bulk density for rice?
White or parboiled rice typically has a bulk density between 0.80 and 0.90 kg per liter. You can adjust this in the tool for specific rice varieties.

What is a good aspect ratio (H:W) for a rice bag?
A ratio between 1.5 and 1.8 is standard for many rice bags, creating a stable, well-proportioned package. A ratio of 1.6 is a common starting point.

Why do I need to input Denier, EPI, and PPI?
These fabric properties allow the calculator to estimate the bag’s empty weight (in grams) and its fabric density (GSM), which are crucial for cost and strength calculations.

What is the difference between Fill Height and Total Cut Length?
Fill Height is the space the rice occupies. Total Cut Length is the full fabric piece needed, including the fill height, headspace, top hem, and bottom fold.

My result seems incorrect. What should I check?
First, double-check that all fields are filled with positive numbers. Ensure your units (cm/in) are consistent for all length-based inputs. Verify the density value for your specific rice type.

Can I use this calculator for other grains like wheat or sugar?
Yes, you can. The core calculation is based on volume. You will need to adjust the Bulk Density value to match the specific grain you are packaging (e.g., wheat is often ~0.78 kg/L).

More useful tools: 1) Number to Words Converter, 2) PP Woven Bag Weight Calculator (from Denier), 3) PP Woven Bag Denier Estimator 4) Rice Bag Size Calculator | Dimensions from Weight & Density

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