Gallon (Imperial) to Quart (US) Converter
1 Gallon (Imperial) is equal to 4.8038Quart (US)s (qt). To convert gallon (imperial)s to quart (us)s, multiply the value by 4.8038 or use the interactive formula breakdown and reference tables below.
Volume Converter
-- Step-by-Step Mathematical Derivation
To convert any quantity from Gallon (Imperial) to Quart (US), multiply the quantity by the constant conversion factor 4.8038.
To reverse the operation, multiply your Quart (US) figure by 0.2081685 (or divide by 4.8038).
- Identify the starting value in Gallon (Imperial) (imp gal).
- Apply the exact linear conversion factor:
1 imp gal = 4.8038 qt. - Multiply the input value by 4.8038 to obtain the exact measurement in Quart (US) (qt).
- Verify precision against standard BIPM / NIST SP 811 statutory guidelines.
All-Units Instant Matrix
Printable Reference Cheat Sheet
Generate clean offline reference PDF tables for Volume & Liquid
Copy and paste this snippet directly into your HTML, WordPress, or documentation site:
Academic & Research Citation Exporter
Cite this mathematical formula and conversion factor in research papers and wikis
@misc{ai_unit_converter_gallon_(imperial)_to_quart_(us),
author = {AI Unit Converters Standards Board},
title = {Exact Gallon (Imperial) to Quart (US) Conversion Factor and Mathematical Derivation},
year = {2026},
howpublished = {\url{https://aiunitconverters.com/volume/gal_uk-to-qt_us}},
note = {Derived from NIST Special Publication 811 and BIPM SI Brochure}
}📊Gallon (Imperial) to Quart (US) Conversion Tables
| 1imp gal | 4.8038qt |
| 2imp gal | 9.6076qt |
| 5imp gal | 24.019qt |
| 10imp gal | 48.038qt |
| 15imp gal | 72.057qt |
| 20imp gal | 96.076qt |
| 25imp gal | 120.095qt |
| 50imp gal | 240.19qt |
| 75imp gal | 360.285qt |
| 100imp gal | 480.38qt |
| 250imp gal | 1,200.9499qt |
| 500imp gal | 2,401.8999qt |
| 1000imp gal | 4,803.7997qt |
| 5000imp gal | 24,018.9985qt |
| 10000imp gal | 48,037.997qt |
| 1qt | 0.2082imp gal |
| 2qt | 0.4163imp gal |
| 5qt | 1.0408imp gal |
| 10qt | 2.0817imp gal |
| 15qt | 3.1225imp gal |
| 20qt | 4.1634imp gal |
| 25qt | 5.2042imp gal |
| 50qt | 10.4084imp gal |
| 75qt | 15.6126imp gal |
| 100qt | 20.8169imp gal |
| 250qt | 52.0421imp gal |
| 500qt | 104.0843imp gal |
| 1000qt | 208.1685imp gal |
| 5000qt | 1,040.8427imp gal |
| 10000qt | 2,081.6855imp gal |
❓ Frequently Asked Questions: Gallon (Imperial) to Quart (US)
How do you convert Gallon (Imperial)s to Quart (US)s?▼
1 Gallon (Imperial) is equal to 4.8038 Quart (US)s. Multiply your input value in Gallon (Imperial)s by 4.8038 to obtain the exact equivalent in Quart (US)s.
How many Quart (US)s are in 1 Gallon (Imperial)?▼
There are exactly 4.8038Quart (US)s (qt) in 1 Gallon (Imperial) (imp gal).
Are these calculations calibrated against official measurement standards?▼
Yes. All conversion factors on AI Unit Converters are calibrated and cross-verified against official BIPM SI Brochure (9th Edition), NIST SP 811, and ISO 80000 measurement metrology standards.