Volume converter
Convert liquid and bulk volume between metric and US/UK customary units. Scale recipes (250 mL ↔ cups), compare fuel economy context (gallons vs liters), and interpret container specs. Note: US gallon (3.785 L) differs from UK imperial gallon (4.546 L).
How to convert volume units
1. Enter volume in the source unit.
2. Select US or UK gallon if both exist — recipes and fuel labels differ by region.
3. Read liters, mL, cups, or cubic meters as needed.
4. For cooking, prefer weight for dry goods when precision matters.
Volume conversion examples
Recipe liquid
500 mL = 2.11 US cups ≈ 1.76 UK pints. Check which cup standard your recipe uses.
Fuel tank
15 US gallons = 56.78 liters. UK 15 imperial gallons = 68.14 liters — 20% larger.
Medicine dose
5 mL = 1 metric teaspoon (5 mL standard in many countries). Do not confuse with kitchen spoons.
When to use the volume converter
• When you follow international recipes with mL and cup measures mixed.
• When you compare beverage or chemical container sizes across regions.
• When you convert pool, tank, or hydraulic specs in liters vs gallons.
Why gallons trip up international shoppers
A UK fuel economy label in miles per imperial gallon looks better than the same car in US gallons because the imperial gallon is larger. Always convert to liters per 100 km for neutral comparison.
Frequently asked questions
US gallon vs imperial gallon?
US gallon = 3.785411784 L. UK imperial gallon = 4.54609 L. Always specify which gallon.
How many mL in a liter?
1000 mL = 1 L. 1 mL = 1 cm³.
What is a US cup?
1 US legal cup = 240 mL. Metric cup in some countries = 250 mL.
Fluid ounces: US vs UK?
US fl oz ≈ 29.57 mL; UK fl oz ≈ 28.41 mL. They differ from weight ounces.
Can I convert cubic meters to liters?
Yes: 1 m³ = 1000 liters exactly.