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Post-Harvest & Storage Calculators

Gunny Bag & Packaging Calculator

Work out the exact number of 50 kg jute or HDPE bags for your harvest, their cost and the storage floor space needed.

Enter your details

Jute bags for grain are usually 50 kg; potato and onion bags 40–50 kg.

kg

For torn bags and re-bagging.

%

Jute bags cost more than HDPE/PP bags.

₹

Farm stores: 8–12. Warehouses stack higher.

bags high

A filled 50 kg bag lying flat is about 0.9 m × 0.6 m.

m²
%

Enter your harvest quantity and bag size, and find out how many bags to buy (with spares), what they will cost, and how much floor space the stacks will need in your store.

About the Gunny Bag & Packaging Calculator

Running short of bags on threshing day means grain lying in the open; buying far too many is money wasted. And once the grain is bagged, it needs dry, raised floor space where the stacks can be inspected and fumigated.

This calculator works out:

  • Bags – quantity divided by bag size, rounded up, plus a few spares.
  • Bag cost – at the price per bag you enter.
  • Floor space – bags in the bottom layer of the stacks, times the area of one bag, plus room for gangways.

It works for any crop and bag: 50 kg jute bags for wheat and paddy, 40–50 kg leno bags for onion and potato, or 25 kg bags for seed.

How to use the Gunny Bag & Packaging Calculator

  1. 1 Enter the quantity to pack and choose quintals, kg or tonnes.
  2. 2 Enter the bag size and a small percentage of spare bags.
  3. 3 Enter the bag price if you want the cost.
  4. 4 For floor space, enter how many bags high you will stack and press Calculate.

The formula we use

Bags = Quantity (kg) ÷ Bag size (kg), rounded up
Bags to buy = Bags × (1 + Spare %)
Floor space = (Bags ÷ Stack height) × Area per bag × (1 + Gangway %)

Worked example

You expect 60 quintals of wheat, packed in 50 kg jute bags at ₹30 each, with 5% spares, stacked 10 bags high.

  1. Bags = 6,000 ÷ 50 = 120 bags; with 5% spares, buy 126 bags costing ₹3,780.
  2. Bottom layer = 120 ÷ 10 = 12 bags.
  3. Floor space = 12 × 0.54 × 1.25 = 8.1 m² = 87 sq ft.

Things to keep in mind

  • Keep stacks off the floor on wooden crates or polythene, and at least 50 cm from walls.
  • Dry grain only. Bag grain at safe storage moisture to prevent mould and insects.
  • Reusing bags is fine if they are sound and treated or sun-dried to kill insects.

Frequently asked questions

How many bags are needed for one quintal?

Two 50 kg bags hold one quintal.

How much space does 100 bags of wheat need?

Stacked 10 high, 100 bags need about 0.54 × 10 = 5.4 m² of stack area, or about 7 m² (73 sq ft) with gangways.

Jute or plastic bags – which is better?

Jute breathes and is preferred for grain meant for longer storage and for government procurement; HDPE/PP bags are cheaper and stronger but can sweat in humid weather.

Last updated . Spotted a mistake or need a unit we don't support? Tell us.