# Converting Between Metric and Imperial Units

The Imperial System had some weird and wonderful units. I've had a lot of fun researching this article, but I still don't really know what a gill, a bushel, a grain, a dram or a short ton are. However, should you ever need to convert these units into metric, or back again, you'll find all the information you need in this article. I've concentrated on units of length, volume, area and mass, and have compiled tables telling you how to convert from metric to Imperial and back again. Let's start with some wacky units of mass.

## Converting Imperial Mass to Metric Mass

Imperial Metric
1 grain 0.065 grams
1 dram 1.772 grams
1 ounce (=16 drams) 28.35 grams
1 pound (=16 ounces= 7,000 grains) 0.45359237 kg
1 stone (= 14 pounds) 6.35 kg
1 quarter (= 2 stone) 12.7 kg
1 hundredweight (= 4 quarters = 112 pounds) 50.8 kg
1 (long) ton (=2,240 pounds) 1.016 tonnes
1 (short) ton (=2,000 pounds) 0.907 tonnes

## Converting Metric Mass to Imperial Mass

Metric Imperial
1 milligram 0.015 grains
1 centigram 0.154 grains
1 decigram 1.543 grains
1 gram 15.43 grains
1 decagram 5.64 drams
1 hectogram 3.527 ounces
1 kilogram 2.205 pounds
1 tonne 0.984 (long) tons

## Converting Imperial Length/Distance to Metric Length/Distance

Imperial Metric
1 inch 25.4 millimetres
1 foot (= 12 inches) 0.3048 metres
1 yard (= 3 feet) 0.9144 metres
1 (statute) mile 1.6083 kilometres
1 (nautical) mile (=1.150779 miles) 1.852 kilometres

## Converting Metric Length/Distance to Imperial Length/Distance

Metric Imperial
1 millimetre 0.0394 inches
1 centimetre 0.3937 inches
1 decimetre 3.937 inches
1 metre 1.0936 yards
1 decametre 10.936 yards
1 hectometre 109.36 yards
1 kilometre 0.6214 miles

## Converting Imperial Area to Metric Area

Imperial Metric
1 square inch 6.4516 sq. centimetres
1 square foot 9.29 square decimetres
1 square yard 0.8361 square metres
1 square mile (=640 acres) 259 hectares
1 (nautical) mile (=1.150779 miles) 1.852 kilometres

## Converting Metric Area to Imperial Area

Metric Imperial
1 square centimetre 0.1550 sq. inches
1 square metre 1.1960 sq. yards
1 are (=100 square metres) 119.60 sq. yards
1 hectare (=100 ares) 2.4711 acres
1 square kilometre (=100 hectares) 0.3861 sq. miles

## Converting Imperial Volume to Metric Volume

Imperial Metric
1 cubic inch 16.4 cubic centimetres
1 cubic foot (=1,728 cubic inches) 0.0283 cubic metres
1 cubic yard (=27 cubic feet) 0.765 cubic metres

## Converting Metric Volume to Imperial Volume

Metric Imperial
1 cubic centimetre 0.0610 cubic inches
1 cubic metre 1.308 cubic yards

## Converting Imperial Capacity to Metric Capacity

The Imperial units for liquid volumes differ slightly from the US standard units. I've just listed the Imperial units here.

Imperial Metric
1 fluid ounce 28.41 mL
1 gill (=1/4 pint) 142.07 mL
1 pint (=20 fluid ounces) 568.26 mL
1 gallon (=4 quarts) 4.546 L
1 peck (=2 gallons) 9.092 L
1 bushel (=4 pecks) 36.369 L

## Converting Metric Capacity to Imperial Capacity

Metric Imperial
1 millilitre 0.002 pints
1 centilitre 0.018 pints
1 decilitre 0.176 pints
1 litre 1.76 pints
1 decalitre 2.20 gallons
1 kilolitre 27.5 bushels

### Description

• Metric numbers
• Speed
• Conversions

and several other topics

### Audience

Year 10 or higher, some chapters are suitable for Year 8+ students

### Learning Objectives

Learn about measurement and related topics

Author: Subject Coach
You must be logged in as Student to ask a Question.