GallonMan Volume, made visible.
Quick quiz

Interactive liquid measurement lab

See liquid volume. Convert it. Remember it.

Turn gallons, quarts, pints, cups, ounces, and liters into relationships you can actually see.

Explore Gallon Man Print free practice
1 US gal 4 qt 8 pt 16 cups

US customary values are labeled. Imperial and metric units stay separate.

Interactive equivalence explorer
Interactive Gallon Man liquid-volume diagram A central one-gallon tank connects to four quart pods. Every quart pod contains two pint bands and four cup markers, showing one gallon equals four quarts, eight pints, and sixteen cups. 1 US GALLON THE WHOLE Q1 P P Q2 P P Q3 P P Q4 P P
Start with the whole gallon. Select a unit below to illuminate its place in the hierarchy.

Choose a level to see how the gallon divides.

Read from big to small

Gallon, quart, pint, cup. The counts are 1, 4, 8, 16.

Read the text equivalent
  • 1 US gallon equals 4 US liquid quarts.
  • Each quart equals 2 US liquid pints, so 1 gallon equals 8 pints.
  • Each pint equals 2 US customary cups, so 1 gallon equals 16 cups.
  • Each US customary cup equals 8 US fluid ounces, so 1 gallon equals 128 fluid ounces.

Instant converter

Convert while you learn

US customary → US customary

1 US gallon equals

4 US liquid quarts

Calculated from the canonical unit dataset.

Conversion path 1 × 3785.411784 mL ÷ 946.352946 mL

Start with an answer

Browse every guide →
4quarts in a US gallon 8pints in a US gallon 16cups in a US gallon 128US fl oz in a US gallon 3.785…liters in a US gallon ≠US vs Imperial gallon

Pick a learning path

Answer now. Understand next.

Every path connects the tool, visual, explanation, and practice—so you can stop when the idea is clear.

02 · Convert it

Liquid volume converter

Move accurately between US customary, Imperial, and metric units.

For teaching and homework help

Resources built around the lesson—not around a download gate

Use a five-lesson sequence, project the Gallon Man diagram, print focused practice, or send a no-account quiz. Teacher notes call out the mistakes worth watching.

  • Clear learning objectives and suggested sequence
  • Answer keys with reasoning, not just numbers
  • Clean print styles with no navigation or ads
  • Accessible HTML that works without a login
Open teacher resources

A sensible sequence

  1. 01
    Estimate capacityChoose a sensible unit
  2. 02
    Build the hierarchyGallon → quart → pint → cup
  3. 03
    Convert with meaningPredict, calculate, check
  4. 04
    Compare systemsLabel US, Imperial, and metric

Accuracy, in plain view

One dataset. Named systems. Traceable sources.

Calculators and generated tables read the same canonical constants. Core values were checked against current NIST material and UK legislation on .

Review sourcesHow corrections work →