US to Metric Converter
Convert US customary volume measurements — gallons, quarts, cups, fluid ounces, and tablespoons — into metric milliliters and liters.
- Free to use
- Accurate results
- No registration required
- Works on all devices
Enter a US volume amount and unit to convert it into metric milliliters or liters.
Your result
3.785
Converted value
AI explanation
Formula
Converted value = amount × (from-unit-to-liters factor) ÷ (to-unit-to-liters factor)Worked example
1 US gallon to liters
| Field | Value |
|---|---|
| Amount | 1 |
| From unit (US) | gal |
| To unit (metric) | l |
| Converted value | 3.7854 |
Assumptions
- Scoped to volume units, since US-to-metric confusion most often comes up for recipes and liquid measurements — use Weight Converter or Length Converter for mass or distance conversions between the two systems.
Frequently asked questions
Does this also convert weight or length from US to metric?
No — this page focuses on volume (the most common US-to-metric mix-up, especially for recipes). For weight, use the Weight Converter (pounds/ounces to kg/g); for length, use the Length Converter (inches/feet to cm/m).
Why is US-to-metric conversion needed for recipes?
Most of the world measures recipe ingredients by volume in metric units (mL, L), while US recipes traditionally use cups, tablespoons, and fluid ounces — this calculator bridges the two.
Is a US gallon the same size as a UK gallon?
No — a US gallon (3.785 L) is smaller than a UK imperial gallon (4.546 L). This converter always uses US customary sizes.