One kilogram of peanut butter is 0.91700867 litres, so converting kilograms of peanut butter to litres means multiplying by 0.91700867. That factor is specific to this ingredient — it comes from its density, not from any relationship between the two units.
Put next to water — 1 g per mL exactly — peanut butter measures 1.0905 g per mL. That ratio, 109.1%, is what separates this page from every other ingredient in the same units, and it is measured rather than defined.
A litre of peanut butter weighs 1.0905 kg, because its density is 1.0905 kg per litre. Litres and kilograms are the units this ingredient is actually bought in at any scale beyond a single recipe, which is what makes this the useful conversion for batch cooking and for costing.
A kilogram of peanut butter is 3.876 cups, and a 500 g pack is 1.938 cups. Metric pack sizes are round numbers in weight and awkward ones in volume, which is the practical argument for scaling a recipe by weight: 1.938 cups is a measurement you have to count out, 500 g is one you read off.
The condition this weight assumes: Smooth, at room temperature. Straight from the fridge it is far harder to level into a cup, and that shows up on the scale.
The formula
kilograms- The amount of peanut butter you are converting, in kilograms
0.917008668605- Litres per kilogram for peanut butter, from its density of 1.0905 g/mL
litres- The equivalent quantity in litres
How it works, step by step
- Enter the quantity in kilograms.
- It is multiplied by 0.917008668605, the litres-per-kilogram figure for peanut butter.
- The result appears in litres, with a second reading in cups beneath it.
- Use the measure table if you want a standard recipe quantity rather than a number you type in.
Worked examples
1/2 kg of peanut butter in litres
Take 1/2 kg of peanut butter: 0.5 × 0.91700867 gives 0.458504 litres. Doubling the batch takes it to 0.917009 litres, because the relationship is a straight proportion once the density is known.
1 kg of peanut butter in litres
Take 1 kg of peanut butter: 1 × 0.91700867 gives 0.917009 litres. Doubling the batch takes it to 1.83402 litres, because the relationship is a straight proportion once the density is known.
2 kg of peanut butter in litres
2 kg of peanut butter weighs out at 1.83402 litres. Divide 1.83402 by 0.91700867 and you get back to 2 kg, which is the quickest check that the factor is the right way up.
How to read your score
Frequently asked questions
How many litres are in 1 kg of peanut butter?
One kilogram of peanut butter is 0.91700867 litres. Half that quantity is 0.458504 litres and double it is 1.83402 litres, so the figure scales straight up and down — there is no offset in this conversion, only the factor.
Why is a cup of peanut butter not 236 g like water?
Because weight per cup depends on what is in the cup. Peanut butter has a density of 1.0905 g per mL where water has 1.00, so a cup of it weighs 258 g rather than 236.6 g. That is a difference of 21.4 g per cup, and it is the reason a single volume-to-weight factor cannot be applied to every ingredient.
Does how I measure it change the weight?
Barely. Peanut butter does not compress, so a cup of it is 258 g however it is poured — within about 1%, which is inside the accuracy of a domestic scale. This is the group where measuring by volume is defensible.
Is a fluid ounce of peanut butter the same as an ounce?
No. A fluid ounce is a volume — one eighth of a US cup, 29.57 mL — and an ounce is a weight. One fluid ounce of peanut butter weighs 1.138 oz, so the two readings differ by 13.8%. They coincide only for something with the density of water, and then only roughly.
Is this a US cup or a metric cup?
US customary: 236.59 mL, which is the cup every US recipe means. A metric cup is 250 mL, so the same cup of peanut butter would weigh 272.63 g instead of 258 g — 14.6 g more, or 5.67%. Australian and some European recipes use the metric cup, and the difference is large enough to matter in baking.
Do I need a scale for this, or will measuring cups do?
A scale, if the result matters. Volume measuring carries a spread of about 1% for peanut butter — roughly 2.58 g on a 258 g cup — while a domestic scale is accurate to a gram or two. For anything where the ratio of ingredients drives the outcome, bread and pastry above all, weigh it.
How much does 2 L of peanut butter weigh?
2 L of peanut butter comes to 2181 g, or 2.181 kilograms. This page runs that calculation in reverse — enter a weight and it returns the volume — and the liters-to-kg page does it in the direction the question is usually asked.
Peanut butter in kilograms and litres
| Kilograms | Litres | Unrounded |
|---|---|---|
| 0.1 kg | 0.0917009 L | 0.09170086686 |
| 1/4 kg | 0.229252 L | 0.2292521672 |
| 1/2 kg | 0.458504 L | 0.4585043343 |
| 3/4 kg | 0.687757 L | 0.6877565015 |
| 1 kg | 0.917009 L | 0.9170086686 |
| 1 1/2 kg | 1.37551 L | 1.375513003 |
| 2 kg | 1.83402 L | 1.834017337 |
| 3 kg | 2.75103 L | 2.751026006 |
Based on 258 g per cup of peanut butter. One kilogram of peanut butter is 0.91700867 litres.
| Measure | Grams | Ounces | Millilitres |
|---|---|---|---|
| 1 cup | 258 g | 9.1 oz | 236.6 mL |
| 3/4 cup | 193.5 g | 6.83 oz | 177.4 mL |
| 2/3 cup | 172 g | 6.07 oz | 157.7 mL |
| 1/2 cup | 129 g | 4.55 oz | 118.3 mL |
| 1/3 cup | 86 g | 3.03 oz | 78.86 mL |
| 1/4 cup | 64.5 g | 2.28 oz | 59.15 mL |
| 1 tbsp | 16.12 g | 0.569 oz | 14.79 mL |
| 1 tsp | 5.375 g | 0.19 oz | 4.929 mL |
US customary measures: 1 cup = 236.59 mL, 1 tbsp = 14.79 mL, 1 tsp = 4.93 mL.
| Ingredient | Grams per cup | Ounces per cup | Density (g/mL) |
|---|---|---|---|
| Tomato sauce | 245 g | 8.642 oz | 1.036 |
| Orange juice | 248 g | 8.748 oz | 1.048 |
| Evaporated milk | 252 g | 8.889 oz | 1.065 |
| Peanut butter (this page) | 258 g | 9.101 oz | 1.091 |
| Sweetened condensed milk | 306 g | 10.79 oz | 1.293 |
| Maple syrup | 322 g | 11.36 oz | 1.361 |
| Corn syrup | 328 g | 11.57 oz | 1.386 |
Ordered by weight. The spread across this group is why a single generic cups-to-grams factor cannot work.