Volume Converter

Enter a volume, choose the unit you have and the unit you want. US and imperial units are listed separately.

Updated October 27, 2026

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<iframe src="/embed/en/unit-converters/volume-converter/" width="480" height="640" title="Volume Converter" loading="lazy" style="border:0;max-width:100%"></iframe>
<script>window.addEventListener('message',function(event){if(event.origin!==''||!event.data||event.data.type!=='calc-embed-height')return;var f=document.getElementsByTagName('iframe');for(var i=0;i<f.length;i++){if(f[i].contentWindow===event.source){f[i].style.height=event.data.height+'px';}}});</script>

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Formula

result = value × (litres per from-unit) ÷ (litres per to-unit)

Exact definitions used: 1 US gal = 3.785411784 L, 1 UK gal = 4.54609 L, 1 in³ = 0.016387064 L, 1 US cup = 1/16 US gal.

Worked example

Convert 5 US gallons to litres: 5 × 3.785411784 = 18.92705892 L.

Frequently asked questions

How many litres are in a US gallon?

One US gallon is exactly 3.785411784 litres, so 10 US gallons is 37.85 L.

What is the difference between a US and a UK gallon?

A UK (imperial) gallon is 4.54609 L and a US gallon is 3.785411784 L, so 1 UK gallon is about 1.2 US gallons.

How many cups are in a US gallon?

There are 16 US cups in a gallon, so half a gallon is 8 cups or about 1.893 L.

How many litres are in a cubic metre?

One cubic metre is exactly 1000 litres, so 0.25 m³ is 250 L.

How we calculate

Volume Converter

Formula

Worked example

Frequently asked questions

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