NIST & ASTM Calibrated
Ref: H₂O @ 4°C = 1.0000 kg/L Density Library
kg to Gallons LAB

Mass to Volume Authority
🇬🇧 UK Weights & Measures Act Standard (4.54609 L)

Kg to Imperial Gallons Calculator

Convert metric mass in kilograms into British Imperial gallons (4.54609 Liters / 277.419 in³) used across the UK, Canada, and Commonwealth nations.

Quick Presets:
Imperial Basis 1 Imperial Gallon = 4.546090 Liters = 277.419 in³ = 160 Imp fl oz
Switch to US Liquid Gallons (3.785 L)
kg
Quick:
British Imperial Volume Result Pure Water
2.1997 Imp Gallons

10 kg of Water yields 2.200 Imperial Gallons (equal to 2.642 US gallons / 10.000 Liters).

US Liquid Gal 2.642 gal
Liters (L) 10.000 L
Imperial Quarts 8.799 qt
Imp Fluid Ounces 351.9 fl oz
Imperial Drum (4.546 L / 277.4 in³) 2.20 Imp Gal
2.200 Imp Gal
Geometric Volume: 610.24 cu inches
Active Density: 1.0000 kg/L
Live Formula: Imp Gallons = 10 kg ÷ (1.0000 kg/L × 4.546090000) = 2.19969 imp gal

Interactive UK Imperial vs US Liquid Comparison Simulator

The British Imperial gallon is 20.095% larger than the US liquid gallon. Use the live volume slider below to inspect the dimensional differences between both international gallon standards.

10 units
Ratio Constant:
1 Imp Gal = 1.20095 US Gal (+20.095%)
🇬🇧 UK Imperial Gallons 10.00 Imp Gal
45.46 Liters
Total Liters: 45.461 L
Water Mass: 100.00 lbs (45.46 kg)
Fluid Ounces: 1,600 Imp fl oz
🇺🇸 US Liquid Gallons 12.01 US Gal
37.85 Liters
Equivalent US Gallons: 12.010 US Gal
US Fluid Ounces: 1,537.2 US fl oz
Volume Difference: -20.095% smaller per gallon

The 1824 British Weights & Measures Principle

The Imperial gallon was physically standardized so that exactly 1 Imperial Gallon of pure water weighs 10 Imperial Pounds at 62°F with air pressure at 30 inches of mercury.

1 Imp Gal Water Mass
10.000 lbs
4.54609 kg (exact standard)
1 Imp Pint Water Mass
1.250 lbs (20 oz)
"A pint of water weighs a pound & a quarter"
1 Imp Fl Oz Water Mass
1.000 oz
1 oz volume = 1 oz mass for water
🍺 British Brewing & Distilling Standards

UK Traditional Brewing Casks & Kegs Converter

In British brewing and cask ale cellaring, liquid volumes are traditionally measured in historic cask sizes based on the Imperial Gallon (4.54609 L). Enter a batch mass in kilograms to see the exact cask yields.

kg
Total Imperial Yield:
105.23 Imp Gal 478.4 L
Pin (4.5 Imp gal)
23.38
36 Imp pints
Firkin (9 Imp gal)
11.69
72 Imp pints (Standard)
Kilderkin (18 Imp gal)
5.85
144 Imp pints
Brewery Barrel (36 Imp gal)
2.92
288 Imp pints
Hogshead (54 Imp gal)
1.95
432 Imp pints
🚗 UK Automotive & Transportation Dynamics

UK Imperial MPG vs US MPG & Fuel Payload Weight Simulator

Because the UK Imperial Gallon is 20.095% larger than the US Gallon, UK fuel economy figures (MPG-imp) appear ~20% higher than American ratings for the identical car. Calculate fuel payload mass and exact cross-standard fuel economy below.

L
Capacity in Imperial Gallons
13.20 Imp Gal
vs 15.85 US Gallons
Full Tank Fuel Mass
44.70 kg
98.55 lbs added weight
Equivalent US Fuel Economy
43.30 US MPG
5.43 L / 100km
Estimated Driving Range
686.3 Miles
1,104.5 km per tank

British Imperial Gallon Standards & History Guide

The British Imperial gallon represents one of the most scientifically calibrated mass-based volume definitions in metrological history.

🏛️ 1. The 1824 Weights and Measures Act

Prior to 1824, Great Britain had three distinct gallon measures: the Winchester Corn Gallon (268.8 cu in), the Wine Gallon (231 cu in), and the Ale Gallon (282 cu in). To eliminate commercial confusion, the British Parliament unified all liquid and dry volume measures under the Weights and Measures Act of 1824 (5 Geo. 4. c. 74).

The newly established Imperial Gallon was defined as the volume of exactly 10 Imperial Standard Pounds of distilled water weighed in air against brass weights at an ambient temperature of 62°F (16.67°C) with the barometer at 30 inches of mercury (101.325 kPa). This yielded 277.274 cubic inches, which was updated in 1985 to exactly 4.546090 Litres.

⚖️ 2. Imperial Pint & Ounce Symmetry

One of the greatest conveniences of the British Imperial system is the mathematical symmetry between mass and volume for water:

• 1 Imperial Gallon = 160 Imperial Fluid Ounces = 10 lbs of water
• 1 Imperial Pint = 20 Imperial Fluid Ounces = 1.25 lbs of water
• 1 Imperial Fluid Ounce of water = 1 Avoirdupois Ounce of mass

In contrast, the US liquid system divides the gallon into 128 fl oz (16 fl oz per pint), meaning 1 US pint of water weighs 1.043 lbs (not 1 lb exact).

Mass to Imperial Gallons Quick Reference Table (1 to 1,000 kg)

Exact volume in UK Imperial Gallons (4.54609 L) across standard industrial fluid densities at 20°C.

Substance Density (kg/L) 1 kg 5 kg 10 kg 25 kg 50 kg 100 kg 500 kg 1,000 kg
💧 Water (Pure, 4°C) 1.0000 0.2200 1.0998 2.1997 5.4992 10.9985 21.9969 109.985 219.969
⛽ UK Unleaded Petrol 0.7450 0.2953 1.4763 2.9526 7.3815 14.7631 29.5261 147.631 295.261
🚚 UK Automotive Diesel 0.8320 0.2644 1.3219 2.6439 6.6096 13.2193 26.4386 132.193 264.386
🍺 Standard Bitter Ale 1.0100 0.2178 1.0890 2.1779 5.4448 10.8896 21.7791 108.896 217.791
🛢️ UK Engine Lubricant (15W-40) 0.8750 0.2514 1.2570 2.5139 6.2848 12.5697 25.1393 125.697 251.393
📏 Legal Definitions

Comparing the 3 Gallon Standards

Never assume all gallons are identical. Here is how the world's legal gallon standards compare:

🧪 Interactive Vessel Comparison

Pour Simulation: Comparing 10 Liters Across the 3 Containers

10.0 Liters
Standard 1

US Liquid Gallon

2.64 gal
3.78541 Liters per Gal
USA fuels, milk, water standard
Standard 2 (+16.4%)

US Dry Gallon

2.27 dry gal
4.40488 Liters per Gal
1/8th Winchester bushel
Standard 3 (+20.1%)

Imperial UK Gallon

2.20 imp gal
4.54609 Liters per Gal
UK Weights & Measures definition
DEFAULT

US Liquid Gallon

Standard US fluid volume unit

  • Metric:3.785411784 L
  • Cubic Inches:231.0 in³
  • Fluid Ounces:128 fl oz
  • Weight of Water:8.34 lbs (3.785 kg)

Imperial / UK Gallon

United Kingdom, Canada & Commonwealth

  • Metric:4.546090 L
  • Cubic Inches:277.419 in³
  • Fluid Ounces:160 Imp fl oz
  • Ratio to US Gal:1.20095 × US Gal

US Dry Gallon

Agricultural commodities (1/8 Winchester Bushel)

  • Metric:4.40488377 L
  • Cubic Inches:268.8025 in³
  • Application:Dry grains, fruit
  • Ratio to US Gal:1.16365 × US Gal
Comprehensive Reference

Kg to Gallons Conversion Chart

Searchable reference table for standard weights from 0.5 kg to 1000 kg.

Max Weight Filter: Up to 1,000 kg
32 benchmark rows
Weight (Kilograms) US Liquid Gallons Imperial (UK) Gallons US Dry Gallons Liters Quick Load
Showing 32 standard benchmark rows Values computed live at standard 20°C density
Answers & Clarity

Frequently Asked Questions

Direct answers to the most common mass-to-volume conversion queries.

The Imperial gallon is legally defined under the British Weights and Measures Act of 1824 (and modern metric statutory instruments) as exactly 4.54609 Liters (277.419 cubic inches). It was standardized as the exact volume occupied by 10 pounds of distilled water weighed in air with brass weights at 62°F (16.67°C).