Find the price per litre of any package.
Converts the price into a per-litre rate, regardless of the actual pack size.
Price per litre: Price ÷ millilitres × 1000
The price per litre calculator turns the price of a bottle or pouch measured in millilitres into a price per litre. It divides the price by the volume in ml and multiplies by 1000. The result lets you compare a 180 ml tetra pack, a 500 ml bottle and a 2-litre jar on equal terms.
Liquids come in a bewildering range of sizes in Indian shops: milk in 500 ml pouches, juice in 180 ml and 1 litre packs, soft drinks in 250 ml, 750 ml and 2.25 litre bottles, shampoo in sachets and 650 ml bottles, and phenyl or floor cleaner in 1 litre and 5 litre cans. Small packs are convenient but are often far more expensive per litre, and this calculator shows exactly how much more.
1. Read the volume in millilitres from the label. If it is in litres, multiply by 1000.
2. Note the price you actually pay.
3. Divide the price by the volume in ml to get the price per ml.
4. Multiply by 1000: Price per litre = Price ÷ ml × 1000.
5. Do the same for each option and compare the per-litre prices.
A litre is 1000 millilitres, so the cost of a litre is 1000 times the cost of one millilitre. Dividing price by ml gives the cost per ml, and the multiplication scales it to a readable figure. The same calculation, multiplied by 100 instead, gives a price per 100 ml, which is how some labels show it. Because the maths is proportional, it works for any liquid sold by volume, from milk to motor oil.
Some products that look like liquids are sold by weight. Edible oil pouches are often labelled in grams, for example 870 g, because oil is lighter than water and a litre weighs roughly 910 to 920 g. Ghee and honey are also commonly sold by weight. If a label shows grams, use the price per kg calculator instead, or convert with the product's density before comparing with a per-litre price.
Packaging, filling, transport and retail margins have a fixed part that does not shrink with the pack. A 180 ml carton carries almost the same handling cost as a 1 litre one, so its price per litre is usually much higher. Sachets take this further. Small packs still make sense for trying a product or for a single use, but for items you use steadily, the per-litre figure shows the premium you pay for convenience.
Meera buys a 180 ml carton of mango juice for ₹20 from a school canteen and wants to see what that works out to per litre.
Answer: Price per litre ₹111
Treating an oil pouch labelled 870 g as 870 ml, which misstates its per-litre price.
Typing litres into the millilitre box, for example 1 instead of 1000.
Comparing a 'buy one get one free' offer using only one bottle's volume.
Forgetting that concentrated products, such as some cleaners, need diluting, so per-litre price alone understates their value.
Comparing milk, juice and soft drink pack sizes.
Choosing between sachets, bottles and refill packs of shampoo, detergent or handwash.
Checking bulk cans of cleaning liquids for a home or office.
Pricing homemade drinks or oils for small-scale sale.
Does this work for any liquid product?
Yes. Cooking oil, milk, shampoo, or any liquid sold by volume can be compared this way.