SalevaSelling loose goods by weight: scales, packing, rounding and the small losses in between
How a small shop can sell rice, daal, sugar and other loose goods by weight without losing a little on every sale: setting up and checking the scale, taking off the packet, weighing to the amount, rounding the bill fairly and checking each sack.
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A customer asks for a pao of daal. You scoop it into a bag, put it on the scale, and the needle settles a little past 250 grams. Taking some out feels petty with the customer watching, so you fold the bag and hand it over. The next customer wants half a kilo of sugar, and the same thing happens.
None of these sales feels like a loss. Each one is a few grams. But a shop that sells loose goods makes dozens of these sales a day, and the grams are paid for in full when you buy the sack.
This article is about the counter itself: the scale, the packet, the scoop and the bill. How to set the price per kilo is covered in how to price products. Here the job is to make sure the weight you charge for is the weight that leaves the shop.
Where the small losses come from
Loose goods lose money in a handful of predictable places. It helps to name them, because each one has a different fix.
| Where it goes | What it looks like | The fix |
|---|---|---|
| Overweighing | A few grams extra on most sales | Weigh to the amount, then stop |
| The packet | The bag's weight is charged as daal, or the other way round | Zero the scale with the bag on it |
| A scale that reads wrong | Every sale off by the same amount | Check it every morning with a known weight |
| Spillage | Sugar on the floor, flour in the air | Fill slowly, keep sacks closed, scoop over the sack |
| Drying out | Some goods lose a little weight while they sit | Buy smaller amounts, store sealed |
| Rounding the bill | Always rounding down for the customer | One rounding rule, used every time |
Most shops lose on the first two without noticing. The rest are smaller, but they add up across a year.
A scale you can trust
The scale is the till for loose goods. If it is wrong, every sale is wrong by the same amount, and you will never see it in a single bill.
A few things matter more than the brand:
- The right size for the job. A scale that weighs up to a few kilos in small steps suits a counter that sells pao and half-kilo amounts. A large platform scale is for sacks and deliveries, not for 100 grams of chillies.
- A flat, steady place. A scale on a sloping counter, or one that wobbles when someone leans on it, will read differently through the day. Put it where it sits level and nobody bumps it.
- Facing the customer. The customer should be able to read the display from their side. More on that below.
If your scale has to be stamped, verified or checked by an inspector where you trade, keep that up to date. The rules differ from place to place, so check what applies to you.
Check it every morning
A scale can drift, get knocked or have a weak battery. A thirty-second check before the first sale catches it.
- Turn it on with nothing on the pan and make sure it reads zero.
- Put a known weight on it. A proper test weight is best. If you do not have one, a sealed one-kilo packet from a brand you trust will show a large error, though not a small one.
- Check that it reads what it should. Take the weight off and see it return to zero.
- If it reads wrong, do not sell by weight from it until it is fixed or reset.
A scale that reads 20 grams light gives 20 grams away on every single sale, all day, every day, and no customer will ever complain about it.
Take the packet off the weight
Every sale goes into something: a paper bag, a plastic packet, a steel bowl the customer brought. That container has weight, and it should not be sold as daal.
Most electronic scales have a tare button. Put the empty bag on the pan, press tare so the display goes back to zero, then fill the bag. What the display shows now is only the goods.
Two habits keep this honest:
- Tare with the same kind of bag you sell in. A thick plastic packet weighs more than a thin paper one. If you tare with a thin bag and sell in a thick one, the customer pays for plastic.
- Clear the tare after each sale. Take the bag off and check the scale reads zero before the next customer. A tare left on from a heavy bowl will undercharge the next sale.
On a scale without a tare button, weigh the empty packet once, write that weight on a card by the scale, and add it to the amount you are filling to. Half a kilo in a bag that weighs 10 grams means filling to 510.
Weigh to the amount, then stop
Overweighing is rarely a decision. It happens because scooping is fast and taking out is slow.
A simple technique fixes most of it:
- Fill to just under the amount with the big scoop.
- Finish with a small spoon or the edge of the scoop until it reaches the amount.
- Stop at the amount. If it goes over by a few grams, take the extra back. It takes a second.
Keep a small spoon next to every sack you sell from. It is the cheapest tool in the shop.
It is worth seeing what a few grams are worth. A worked example, with round numbers:
- Daal sells at Rs 360 a kilo.
- A shop sells about 40 small amounts of it a day.
- Each one goes about 20 grams over.
That is 40 × 20 = 800 grams a day, or Rs 288 of daal given away each day. Over a month of 30 days it is about Rs 8,600, from one product. Now think of sugar, rice, flour and the rest. These are example numbers, but the arithmetic is the same for any shop.
Giving a little extra to a regular customer can be good business. Do it on purpose, when you choose to, not on every sale by accident.
Round the bill the same way every time
Weight rarely comes out to a round number. A customer asks for "about half a kilo" and the scale says 0.47 kg. At Rs 360 a kilo, that is Rs 169.20. You cannot hand back 20 paisa, so you round.
Pick one rule and use it for every sale:
- Round to the nearest Rs 5. Rs 169.20 becomes Rs 170. Rs 166 becomes Rs 165. Over many sales it evens out, and nobody can say you always round in your own favour.
- Or weigh to a round amount. If the customer asked for half a kilo, give exactly half a kilo and charge the round price. This is easier for everyone and is what most counters do for the common sizes.
What causes losses is rounding down whenever it is awkward to ask for the extra coins, and up only when the customer is not looking. A fixed rule removes the decision.
The same applies to the price list. Customers mostly buy a kilo, half a kilo and a pao, so work out those three prices once and write them on a card by each sack. Nobody should be multiplying 0.25 by 360 in their head with a queue waiting.
Pre-pack the sizes that sell most
At a busy hour, weighing every sale from the sack is slow, and slow weighing is loose weighing. Many shops pack the most common amounts in a quiet hour instead.
How to do it well:
- Pack only the sizes that sell most. Usually a kilo, half a kilo and a pao of the fast sellers like sugar, daal and rice.
- Pack in a quiet hour, on a checked scale, with the tare set for the packet you are using.
- Write the weight and the date on each packet, or on a label. Older packets go to the front.
- Check a few afterwards. Weigh three or four packets from each batch. If one is off, recheck the whole batch.
- Do not pack too far ahead. A week's worth is plenty. Packed goods take up shelf space and can pick up damp or lose freshness.
Keep the open sack for customers who want an odd amount.
If you buy the same item in sacks of different sizes, the unit price calculator shows which sack costs less per kilo before you add packing.
Check what each sack gives you
The scale shows each sale. It does not show what you have lost. For that, follow one sack from start to finish.
Pick a fast seller. When a new sack is opened, write down the date and its weight. Sell from it as normal. When it is empty, add up what was sold from it.
An example with round numbers: a 25 kg sack of sugar is opened on a Monday. When it runs out, the records show 24.4 kg sold. The missing 0.6 kg, about 2.4% of the sack, went somewhere: overweighing, spillage, packets, or sales that were never recorded.
You do not need to do this for every sack. Do it for one sack of each main product every month or two. If the gap is small and steady, you know your real cost and can price for it. If it grows, look at the habits above, starting with the scale check and the spoon.
The same weighing is what makes a loose goods count honest at stock-taking time. A half-full sack is weighed, not guessed, and the sack's own weight is taken off, as described in how to do a full stock take. If your losses on loose goods are larger than you expected, reducing stock loss covers the wider picture.
Let the customer see the scale
Weight is the one thing on the counter the customer cannot check for themselves. Trust comes from letting them watch.
- Turn the display towards the customer, or use a scale with a display on both sides.
- Show zero before you start, with the empty bag on the pan.
- Let the reading settle before you take the bag off. Lifting it while the number is still moving looks like a trick, even when it is not.
- Say the weight and the price out loud. "Half kilo, Rs 180." It takes two seconds and removes most arguments.
- Weigh again if asked, without fuss. A customer who wants to see a recheck is a customer who plans to come back.
Questions shopkeepers ask
Do I need an electronic scale, or is a balance with weights enough?
Either can be accurate if it is looked after and checked. An electronic scale is faster, has a tare button and shows the customer a number they can read. A balance needs a full set of weights in good condition, and a missing or worn weight makes every sale with it wrong. Whatever you use, check it against a known weight each morning.
Should the packet weight be charged to the customer?
No. The customer is buying the goods, not the bag. Tare the scale with the packet on it, or add the packet's weight to the amount you fill to. If your packing costs money, include it in the price per kilo, not in the weight.
How do I handle a customer who asks for "Rs 50 of sugar"?
Work out the weight once for the common amounts and write it on the price card, so nobody has to calculate at the counter. At Rs 160 a kilo, for example, Rs 50 buys about 312 grams. Weigh to that amount and charge Rs 50. Keep the card up to date whenever the price per kilo changes.
How much loss on a sack is normal?
There is no number that fits every shop or product. Fine goods like flour and sugar spill more than whole lentils, and some goods dry out more than others. The useful number is your own: check a few sacks, see what your gap is, and watch whether it grows or shrinks.
Saleva keeps loose goods in the same unit you sell them in. A product like sugar or daal is priced per kilo and marked as sold by weight, so the bill and the stock both move by the weight you sold rather than by made-up pieces, and a stock take compares kilos with kilos. The products and stock guide shows how to set this up.
Try this in Saleva
Saleva is a free Android point-of-sale app for small shops: selling, stock, customer dues, staff and an online shop page. Selling works with no internet at all.