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The Price Per Liter Calculator provides the essential unit price for liquid products in metric measurement, making it the standard comparison tool for beverages, liquid cleaning supplies, oils, personal care products, and any liquid sold by volume in metric units. While the US primarily uses fluid ounces and gallons, the liter is the international standard unit of volume under the SI (International System of Units) and is used by most of the world's population for everyday liquid measurement.
In the US, liters appear most commonly in soda and water bottles (1L, 1.5L, 2L, 3L sizes), alcoholic beverages (750ml = 0.75L wine bottles; 1L, 1.75L spirits), motor oil and automotive fluids, European and international products, and scientific and industrial contexts. For consumers comparing European-labeled personal care products, international beverages, or specialty foods, this calculator provides the per-liter comparison needed.
The calculator also outputs price per 100ml — the standard EU unit price format required on product labels across the European Union and UK. This makes it easy to verify or reproduce the unit price shown on European products and to compare them with US-labeled alternatives once the appropriate conversions are made.
Whether you're comparing imported products, shopping at an international food market, calculating fuel costs in countries using liters, or simply comparing different-sized liquid containers, this calculator gives you the consistent, objective price metric needed for confident purchasing decisions.
Price per liter is a direct volume-to-cost ratio:
$$\text{Price Per Liter} = \frac{\text{Total Price}}{\text{Volume (L)}}$$
$$\text{Liters Per Dollar} = \frac{\text{Volume (L)}}{\text{Total Price}}$$
$$\text{Price Per 100 ml} = \frac{\text{Price Per Liter}}{10}$$
since 1 L = 1000 ml, so 100 ml = 0.1 L.
Example: comparing a 1.5 L bottle at $1.89 vs. a 2 L bottle at $2.29:
$$\text{Price}_1 = \frac{1.89}{1.5} = \$1.26/\text{L}$$
$$\text{Price}_2 = \frac{2.29}{2.0} = \$1.145/\text{L}$$
The 2L bottle is cheaper per liter ($1.145 vs. $1.26), making it the better value by about 9% per liter despite costing more in total.
The price per liter is your primary comparison metric — lower means better price value for the volume received. The price per 100ml is especially useful for personal care products (shampoo, conditioner, skincare) where per-liter is large and per-100ml is more intuitive for relatively small bottles. The liters per dollar is the reverse metric: higher means more volume per dollar.
When comparing products measured in different volume units, convert first: 1 fluid ounce = 0.02957 liters; 1 US gallon = 3.785 liters; 1 UK pint = 0.568 liters. Once all volumes are in liters, this calculator produces directly comparable results.
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A 750ml bottle of olive oil at $12.99 costs $17.32/L or $1.73/100ml. Compare to larger bottles to assess bulk savings.
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$2.29 for 2L = $1.145/L. A 1.5L at $1.89 = $1.26/L. The 2L is 9.2% cheaper per liter.
Use the conversion: 1 US fluid ounce (fl oz) = 0.029574 liters. To convert fl oz to liters: liters = fl oz × 0.029574. Common conversions: 8 fl oz = 0.237 L | 16 fl oz = 0.473 L | 32 fl oz = 0.946 L | 64 fl oz = 1.893 L | 128 fl oz (1 gallon) = 3.785 L. Enter the converted liter volume along with the price to get the per-liter cost, which you can then compare with other liter-labeled products.
The EU's Price Indication Directive (98/6/EC) requires unit price labeling using the reference quantity most suitable for the product type. For small-volume products (cosmetics, condiments, medicine), price per 100ml is more practical than per liter because the per-liter number would be large and harder to intuitively compare. For larger volume products (beverages, cleaning fluids), price per liter is typically used. The per-100ml calculation in this calculator mirrors the EU standard, making it easy to verify or recreate EU-style unit prices for international product comparison.
Yes — in countries where fuel is sold by the liter (most of the world outside the US), this calculator directly gives you the price per liter. If fuel is priced per gallon in the US and you want to compare to overseas prices: divide the US price per gallon by 3.785 to get the equivalent per-liter price. For example, US gas at $3.80/gallon = $3.80 / 3.785 = approximately $1.00/liter — which is useful context when comparing to European fuel prices (typically €1.50–2.00/liter).
US approximate per-liter prices (2024): Tap water <$0.01/L | Bottled water: $0.50–2.00/L | Soda (2L): $0.90–1.50/L | Orange juice: $1.50–3.00/L | Milk: $0.80–1.20/L | Beer (domestic): $2–4/L | Wine (750ml): $10–30+/L | Olive oil (extra virgin): $12–25/L | Gasoline: ~$0.95–1.30/L (equiv. of $3.60–5.00/gallon). These wide ranges reflect quality, brand, and retail channel differences. This calculator helps you compare specific products at your actual local prices.
Enter each bottle separately: for the 750ml bottle, enter 0.75 in the liters field. For the 1.5L (magnum) bottle, enter 1.5. Compare the resulting price-per-liter outputs. Magnums (1.5L) are often equal or slightly better value per liter than standard 750ml bottles from the same producer, though premium and collectible magnums can command a price premium. This comparison is also useful for box wines (typically 3L or 5L) which almost always offer lower per-liter prices than bottled equivalents of comparable quality.
Yes — for international fuel cost comparison, enter the local price and volume (in liters). To convert a US gallon price to per-liter: divide by 3.785. To convert a UK pint price to per-liter: divide by 0.568. Then compare the resulting $/L figures. Keep in mind that fuel is often taxed very differently across countries, and purchasing power parity (local wage levels) makes direct price comparisons across countries less straightforward than within a single country or market.
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