How do I convert gallons to liters?

For US gallons, multiply by 3.785411784. For UK (imperial) gallons, multiply by 4.54609. This converter lets you pick which gallon you mean.

What’s the reference unit?

Internally we convert everything to cubic meters (m³), then to all the other volume units.

Can I convert between cubic feet and liters?

Yes. 1 ft³ = 28.316846592 L. Enter a value in cubic feet and the liters field will update automatically.

Volume Converter – Liters, Gallons, m³, ft³, mL

Volume Converter

Convert between liters, gallons (US & UK), cubic meters, cubic feet, milliliters and cubic inches. Type in any field to update all the others.

Gallon standard

US gallon (3.785411784 L) UK / imperial gallon (4.54609 L) Switching this will recalculate gallons from current volume.

Liters L

Milliliters mL

Gallons gal

Cubic meters m³

Cubic feet ft³

Cubic inches in³

Common volume conversions

From	To	Multiply by
liter (L)	m³	0.001
m³	liter	1000
US gallon	liter	3.785411784
UK gallon	liter	4.54609
ft³	liter	28.3168466
in³	liter	0.016387064

How this volume converter works

We use cubic meters (m³) as the internal base unit. Each time you type a value, it is converted to m³ and then to all other units using precise SI factors.

Key relations

1 L = 0.001 m³
1 mL = 0.000001 m³
1 ft³ = 0.028316846592 m³
1 in³ = 0.000016387064 m³
1 US gal = 0.003785411784 m³
1 UK gal = 0.00454609 m³

FAQ

Why do I see many decimals? For industrial and engineering contexts, exact factors are useful. Round to 2–3 decimals for daily work.
US vs UK gallons? Pick the right radio button above to switch.