Easy cost calculator for PP woven and BOPP bags
Nexora’s demo calculator for a quick look at a bag price. Pick a width, type a length, choose the gram — and get the weight of one bag and an indicative figure. Two bags: a plain or laminated PP woven sack, and a both-side BOPP laminated bag with liner, gusset and glossy or matt film.
A figure you can stand behind comes from your own construction, your own route through the plant, your own recipes and your own dated raw material prices. That is what the Nexora Sales & Costing engine does, and it is a different calculation from this one.
Bag specification
A demo sum on the gram, not a bill of materials, and no accuracy is guaranteed. It does not know your construction, your route, your recipes or your prices — so its weight and its figure will differ from a costed BOM. The result also moves with order quantity, artwork and the day's market rate.
A real cost per bag comes from your construction, your route through the plant, your recipes and your own dated raw material prices — every figure traceable to the formula and the price behind it. That is what the Nexora engine does, and it is a different calculation from this one.
Material prices & constants
Every number this calculator uses, and every one of them yours to change. Type over any box and the weight and the price follow it straight away.
PP woven — fabric ₹ / kg
Lamination ₹ / kg · printing ₹ / bag
BOPP laminated
Liner ₹ / kg · stitching ₹ / bag
What the gram is, and why it is not GSM
A bag maker quoting on the phone says "three and a half gram", and everyone in the room knows what is meant. That figure is not grams per square metre. It is the shop-floor number the whole trade sum is built on: width in inches, multiplied by the gram, multiplied by the cut length in inches, divided by 39.37. This calculator keeps the gram exactly as the trade uses it and never converts it, because the point of a quick estimate is that it answers the question you actually asked.
cut length = length + 1″ stitching
fabric (g) = width × gram × cut ÷ 39.37 + 1 g thread
lamination (g) = width × 0.5 × cut ÷ 39.37 (if laminated)
cost = fabric×rate÷1000 + lamination×rate÷1000 + printing + fixed + jumbo
BOPP laminated, both sides
plain (g) = width × gram ÷ 39.37 × cut + 1 g thread
coating (g) = width × 0.70 ÷ 39.37 × cut
film (g) = width×25.4 × cut×25.4 × 0.91 × micron × 2 sides ÷ 1,000,000 + 0.2 g trim
price = fabric + coating + film + liner + stitching + making + profit
The fabric rate is not one number: it moves with the gram, with a 19″ roll, with a maxi roll at 36″ and over, and on a BOPP bag with a side gusset. The calculator shows the arithmetic under the result, so you can see which adjustment did what.
Why a demo figure differs from a real costing
It will differ, and it should. A quick sum on the gram treats the bag as fabric plus a film plus a couple of per-bag charges. A real cost per bag is built the other way round: from the construction, every layer's own weight, the route the bag takes through the plant, the recipe at each process, the waste at each stage and the price you actually paid for each raw material on the date you bought it. The two are different calculations answering different questions, which is why no accuracy is guaranteed here.
Use this one when a buyer is on the phone. Use the Nexora engine when you are quoting.
FAQ
Are these your rates?
No. Every rate on the page is a round, illustrative sample so that the calculator shows something rather than zero. They are not a quotation, not a market rate and not anybody's price list. Open the sample rates and type your own over them.
Is this the same as Nexora’s costing?
No. This is Nexora’s demo calculator for a quick look, and we give no guarantee of its accuracy. The Nexora Sales & Costing engine costs a bag from its construction, its route through the plant, the recipe at each process and your own dated raw material prices, with every figure traceable to the formula and the price behind it.
Is the gram the same as GSM?
No. The trade gram (2.5 to 4.5) is the figure the shop-floor formula uses; grams per square metre is a different number entirely. This page stays on the gram and never converts it. If you want to work in GSM, micron and denier, use the full bag weight calculator.
Why is one inch added to the length?
For the stitching allowance. The cut length is always a little more than the finished length, and one inch is what the trade sum assumes. Your own allowance may differ.
Why is the thread in the weight but not in the fabric charge?
Because a gram of stitching yarn is not a gram of woven PP and is not bought at the fabric rate. The BOPP sum carries it in the weight and leaves it out of the fabric charge, which is what the trade sheet does.
Is anything I type here saved or sent?
No. The calculator runs entirely in your browser. Nothing is stored and nothing is sent anywhere.