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Convert between volume units instantly. Our free online volume converter supports liters, gallons, cups, fluid ounces, milliliters, and more with precise, real-time results.

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Volume Converter

Free Volume Converter - Liters to Gallons, Gallons to Liters, US Gallon to Liters - Convert L to Gallons Instantly

Convert any volume measurement instantly with OmniConverter's free online volume converter. 1 US gallon equals 3.785 liters, 1 liter equals 1,000 milliliters, and 1 cup equals 236.6 milliliters. Supports liters, milliliters, US gallons, fluid ounces, cups, pints, quarts, and cubic meters. Perfect for cooking, chemistry, or fuel calculations where accurate liquid measurements are essential.

How It Works

Convert in three simple steps.

1

Enter the Volume You Want to Convert

2

Choose Source and Target Volume Units

3

Get Your Instant Volume Conversion

Popular Volume Conversions

Liters to GallonsGallons to LitersMilliliters to Fluid OuncesFluid Ounces to MillilitersLiters to MillilitersMilliliters to LitersCups to MillilitersMilliliters to CupsTablespoons to MillilitersMilliliters to TablespoonsTeaspoons to MillilitersMilliliters to TeaspoonsLiters to CupsCups to LitersQuarts to LitersLiters to QuartsPints to LitersLiters to PintsCubic Meters to LitersLiters to Cubic MetersCups to Fluid OuncesFluid Ounces to CupsTablespoons to TeaspoonsTeaspoons to Tablespoons

Common Benchmarks

Reference

1 L → L

1 L

Reference

1 L → mL

1000 mL

Reference

1 L → m³

0.001 m³

Reference

1 L → gal

0.2641721769 gal

Reference

1 L → qt

1.0566881491 qt

Reference

1 L → pt

2.1133785315 pt

Reference

1 L → cup

4.2267570629 cup

Reference

1 L → fl oz

33.8140565033 fl oz

Real-World Use Cases

Volume conversion is used in cooking and baking (adapting US recipes that use cups and fluid ounces to metric measurements), brewing and winemaking, fuel economy calculations (liters per 100 km vs miles per gallon), chemistry and pharmacy (precise liquid measurements), aquarium and pool capacity, HVAC and plumbing (duct and pipe flow rates), and international shipping of liquids.

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Frequently asked questions

Quick answers to common conversion questions

How do I convert liters to gallons?+

Multiply liters by 0.264172 to estimate US gallons.

What is the difference between fluid ounces and ounces?+

Fluid ounces measure volume, while ounces measure mass.

How do I convert milliliters to cups?+

Divide milliliters by 236.588 to get US cups.

What is a cubic meter?+

A cubic meter measures three-dimensional space and is equal to 1,000 liters.

How do I convert tablespoons to teaspoons?+

Multiply tablespoons by 3 to get teaspoons.

Can I convert gallons to liters easily?+

Yes. Multiply gallons by 3.78541 to get liters.

Why are there US and imperial gallons?+

Different measurement systems use different gallon sizes, so choose the right one for your region.

What is the best unit for cooking?+

Milliliters, liters, cups, teaspoons, and tablespoons are commonly used in recipes.

How do I convert cubic centimeters to milliliters?+

They are equivalent: 1 cubic centimeter equals 1 milliliter.

Are volume conversions affected by temperature?+

The numeric conversion itself is fixed, but real-world material density can vary with temperature.

Latest Blog Posts

Tips, guides, and insights about unit conversions

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Quick Answer: Volume Converter

Convert volume instantly — enter any value and get all units at once. The top searches are liters to gallons conversion (28,557 impressions) and gallons to liters (18,496). Volume conversion is crucial for cooking and baking (US cups vs UK), fuel efficiency, pharmaceutical dosing, and trade — especially US vs UK gallon confusion when comparing fuel economy or recipes.

How the Volume Converter Works

Our volume converter uses accurate conversion factors to convert between liters, gallons, cups, fluid ounces, milliliters, and other volume units. For gallons, we distinguish US gallon (3.78541 L, 231 in³) and UK gallon (4.54609 L) — a common source of confusion. Results update instantly as you type, so you can see liters to gallons and gallons to liters side by side.

Formula & Sources

SI litre = 1 dm³. US customary definitions from NIST SP 811: 1 US gallon = 231 in³ exactly.

Worked Example

Example: 2 liters to US gallons — 2 × 0.264172 = 0.528 gal. Reverse: 1 gal × 3.78541 = 3.785 L.

Common Volume Conversions

The top searches are liters to gallons conversion (28,557 impressions) and gallons to liters (18,496). Key factors: 1 liter = 0.264172 US gallons, 1 US gallon = 3.78541 liters, 1 UK gallon = 4.54609 liters, 1 liter = 0.219969 UK gallons. Also: cups to milliliters (1 cup = 236.6 mL) and how many liters in a gallon — 3.785 L (US) or 4.546 L (UK). For UK, liters to gallons UK is 1 L = 0.22 UK gal.

When to Use Volume Conversion

Volume conversion is crucial for cooking and baking (US cups vs UK), fuel efficiency, pharmaceutical dosing, and trade — especially US vs UK gallon confusion when comparing fuel economy or recipes. Use the converter to see both US and UK gallons at once and avoid the 20% difference.

Accuracy & Common Mistakes

All factors are stored unrounded and computed in double precision. We avoid cumulative rounding by converting via a base unit. Always verify critical results with a second source for safety-critical tasks.

Frequently Asked Questions

How many liters in a gallon? (liters to gallons)

1 US gallon = 3.78541 liters, 1 UK gallon = 4.54609 liters. So 1 liter = 0.264172 US gallons or 0.219969 UK gallons. For liters to gallons conversion, divide liters by 3.785 (US) or 4.546 (UK).

How many liters in a US gallon?

1 US gallon = 3.78541 liters exactly (231 cubic inches, NIST). For US gallon to liters, multiply gallons by 3.785. Example: 5 US gal = 18.927 L.

What is the difference between US and UK gallon?

1 UK gallon = 4.54609 liters, 20% larger than 1 US gallon (3.78541 L). Liters to gallons UK is 1 L = 0.219969 UK gal. Check which gallon your source uses.

Volume Conversion Chart

Quick reference for common conversions

Volume Conversion Chart — multiply the From value by the factor to get the To value.
FromToMultiply By
1 litergallons (US)0.2642
1 gallonliters3.785
1 cupmilliliters236.6
1 fluid ouncemilliliters29.57
1 tablespoonmilliliters14.79
1 teaspoonmilliliters4.93
1 litercups4.227
1 gallonquarts4

Popular Volume comparisons

Jump directly to a side-by-side comparison — no typing needed. Also discoverable via search.

Liter → Milliliter→Liter → Cubic Meter→Liter → Gallon (US)→Liter → Quart (US)→Milliliter → Cubic Meter→Milliliter → Gallon (US)→
View all comparisons

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