gallon → liter | Converter

Convert gallon to liter with the formula below. 1 gal ≈ 3.785411784 L

Quick Insight

1 gallon = 3.785412 liter

1 gal ≈ 3.785411784 L. Identify the system before converting; the gallon, quart and pint in this calculator are US liquid units.

💡 Tip: Compare the contents stated on both containers, rather than mixing a fill amount with maximum capacity.

Comparing liquid containers

Quick Values:

From

3.785411784

Formula: L ≈ gal × 3.785411784

Rounded factors

Relative rounding difference; not measurement uncertainty.

3.8

2 significant digitsΔ 0.39%

3.78541

6 significant digitsΔ 0.000047%

3.785411784

12 significant digits

Visual Comparisons

◫

1 gal → 3.785411784 L

◫

2.64 gal → 9.99348711 L

◫

5 gal → 18.92705892 L

◫

26.4 gal → 99.9348711 L

◫

264 gal → 999.348711 L

Mathematical Facts

📐Conversion formula: L ≈ gal × 3.785411784

🔄Reverse conversion: gal ≈ L × 0.264172052358

Convert gallon to liter with the formula below. L ≈ gal × 3.785411784. 1 gal ≈ 3.785411784 L; 1 L ≈ 1 L US customary liquid measures are used. US gallons are useful for comparing liquid-container contents on a larger household scale. Liters are useful for comparing bottle contents and recipe batches without counting many small measures.

Why This Conversion Matters

Put quantities on jugs or bottles into one unit before comparing or adding their contents. Keep the US liquid definition with customary unit labels. The calculator uses the full stored factor and rounds displayed results to 12 significant digits. Display precision is not a guarantee of measurement accuracy.

Real-World Examples

Comparing liquid containers

Compare 1 US gallon of liquid with the 5-gallon total from five equal quantities. Put quantities on jugs or bottles into one unit before comparing or adding their contents. Keep the US liquid definition with customary unit labels.

Examples:

1 gal ≈ 3.785411784 L
5 gal ≈ 18.92705892 L

Pro Tips:

✓Compare the contents stated on both containers, rather than mixing a fill amount with maximum capacity.

Quick Reference Table

gallons	liters
1 gal	3.785411784 L
10 gal	37.85411784 L
25 gal	94.6352946 L
50 gal	189.2705892 L
100 gal	378.5411784 L

Formula: L = gal × conversion factor

Common Mistakes to Avoid

Substituting Imperial liquid measures for US liquid measures

A US liquid gallon is 3.785411784 L; an Imperial gallon is 4.54609 L. Matching unit names do not make their sizes equal.

✓ Identify the system before converting; the gallon, quart and pint in this calculator are US liquid units. 1 gal ≈ 3.785411784 L.

Pro Tips

✓Check the gallon system: the US liquid gallon here is 3.785411784 L, not the Imperial gallon.
✓When combining bottles, add their stated liter contents rather than their outside container sizes.
✓Compare the contents stated on both containers, rather than mixing a fill amount with maximum capacity.

Sources and unit definitions

Frequently Asked Questions

How do I calculate the conversion?

L ≈ gal × 3.785411784. 1 gal ≈ 3.785411784 L; 1 L ≈ 1 L US customary liquid measures are used.

What is an example?

1 gal ≈ 3.785411784 L; 10 gal ≈ 37.85411784 L; 100 gal ≈ 378.5411784 L

gallon → liter: What do the worked quantities look like?

1 gal ≈ 3.785411784 L; 5 gal ≈ 18.92705892 L. Compare the contents stated on both containers, rather than mixing a fill amount with maximum capacity.

Which definition or measurement error should I check?

A US liquid gallon is 3.785411784 L; an Imperial gallon is 4.54609 L. Matching unit names do not make their sizes equal. Identify the system before converting; the gallon, quart and pint in this calculator are US liquid units.