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Volume & Capacity Converters

Convert between litres, gallons, millilitres, cups and cubic metres. Instant volume converters with formulas, tables and examples.

By MerQPrime Editorial TeamUpdated 2026-06-20Reviewed 2026-06-20Editorial policy

About volume conversions

Volume is where measurement systems diverge the most: litres and millilitres dominate the metric world, while US gallons and cups are standard in American recipes — and an imperial gallon is different again. Accurate volume conversion keeps recipes, fuel calculations and lab work correct.

Use the converters below to move between litres, gallons, millilitres, cups and cubic metres. Each uses the precise US definition where applicable, with worked examples for the most common cooking and fuel conversions.

Key formulas

Litres to US gallons

gal = L × 0.264172

US gallons to litres

L = gal × 3.785412

Cups to millilitres

ml = cups × 236.588

Litres to millilitres

ml = L × 1000

Popular volume conversions

liters to gallonsgallons to literscups to mlml to cupsliters to mlml to liters

Worked examples

  • •1 litre is about 0.264 US gallons.
  • •1 US cup is roughly 236.6 ml.
  • •5 litres equals 5000 ml.

All volume converters

liters → gallonsliters → mlliters → m3liters → cupsgallons → litersgallons → mlgallons → m3gallons → cupsml → litersml → gallonsml → m3ml → cupsm3 → litersm3 → gallonsm3 → mlm3 → cupscups → literscups → gallonscups → mlcups → m3

Popular exact volume conversions

Instant answers for the specific amounts people search most.

1 cups to ml2 cups to ml3 cups to ml4 cups to ml50 ml to cups100 ml to cups120 ml to cups150 ml to cups200 ml to cups250 ml to cups500 ml to cups1 liters to gallons

Support

Frequently asked questions

How do I convert volume units?
Pick the volume converter you need below, type a value, and the result appears instantly in your browser. Each pair uses the exact international factor — for example, litres to us gallons: gal = L × 0.264172.
Which volume conversions are most common?
The most-used volume conversions are liters to gallons, gallons to liters, cups to ml. Each has a dedicated page with a calculator, formula, conversion table and FAQs.
Are these volume converters accurate?
Yes. Every conversion uses standard international factors and precise floating-point math, suitable for everyday, academic and professional use.
Is my data sent to a server?
No. All conversions run locally in your browser on MerQPrime. Nothing you type is uploaded.
Volume Converters — litres, gallons, ml, cups & m³ | MerQPrime