This free online price calculator works out the total cost of an item from its price per kilogram and its weight in grams. It's a quick way to check grocery or bulk item pricing without doing the math by hand.
How to Use the Price Calculator
Enter the cost per kilogram in the "Price per Kilogram (₹)" field.
Enter the item's weight in grams in the "Weight in Grams" field.
Click "Calculate" to see the total cost shown above.
The Formula
Since 1 kilogram is 1,000 grams, the cost of any weight is: Total Cost = Price per kg × Weight in grams ÷ 1,000. The answer is rounded to the nearest paisa (two decimal places).
Tomatoes at ₹60 per kg, 750 g: 60 × 750 ÷ 1,000 = ₹45.
Cashews at ₹1,200 per kg, 250 g: 1,200 × 250 ÷ 1,000 = ₹300.
Paneer at ₹440 per kg, 200 g: 440 × 200 ÷ 1,000 = ₹88.
Quick Reference for Common Quantities
Shopkeepers often weigh out quarter, half and three-quarter kilos. This table shows what those amounts cost at three sample rates.
Weight
At ₹60/kg
At ₹180/kg
At ₹800/kg
100 g
₹6
₹18
₹80
250 g
₹15
₹45
₹200
500 g
₹30
₹90
₹400
750 g
₹45
₹135
₹600
1 kg
₹60
₹180
₹800
1.5 kg
₹90
₹270
₹1,200
2 kg
₹120
₹360
₹1,600
Comparing Pack Sizes
The formula also works in reverse, which is useful when two packs of different sizes are on the shelf: Price per kg = Pack price ÷ Weight in grams × 1,000. A 400 g pack of dal at ₹42 works out to 42 ÷ 400 × 1,000 = ₹105 per kg, so a 1 kg pack at ₹96 is the cheaper buy, as long as you will use it before it goes stale.
Many packaged goods in India now print a unit sale price, such as the price per kg or per 100 g, next to the MRP, which makes this comparison easier. For loose items, the calculator is the quickest way to check the amount charged on a shop or vendor bill.
Tips for Other Units
Weight in kilograms: multiply by 1,000 before entering it, so 1.25 kg becomes 1,250 g.
Price per 100 g: multiply by 10 to get the price per kg. Dry fruits priced at ₹95 per 100 g cost ₹950 per kg.
Price per litre and volume in millilitres: the arithmetic is identical, because 1 litre is 1,000 ml. Enter the rate per litre and the volume in ml.
Check the scale shows zero before weighing, and that the weight on the bill is the net weight without the bag or container.
Frequently Asked Questions
The calculator multiplies the price per kilogram by the weight in grams, then divides by 1000 to convert grams to kilograms, giving the total cost.
The calculator is set up for price per kilogram and weight in grams. To use other units, convert your weight to grams first before entering it.
Divide the pack price by its weight in grams and multiply by 1,000. A 200 g pack priced at ₹55 works out to 55 ÷ 200 × 1,000 = ₹275 per kg. Doing this for each pack size shows which one is cheaper per kilogram.
Yes, provided both the rate and the quantity are in volume. Enter the price per litre in the first box and the quantity in millilitres in the second. Do not mix a per-litre rate with a weight in grams, because a litre of oil weighs less than a kilogram.
This calculator shows paise exactly, while many shops round the bill to the nearest rupee. Electronic scales may also record weight to the nearest 5 or 10 grams, so a small difference is normal.