tonne (t)
A metric unit of mass equal to 1000 kg.
The tonne (also known as the metric ton) is a non-SI unit of mass accepted for use with the SI. It is equal to 1000 kilograms. It is distinct from the 'long ton' (UK) and 'short ton' (US).
Convert Mass
Here you can convert units like tonne, centner, kilogram, gram, etc. within the mass category.
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| Unit | Value | Actions |
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long hundredweight
cwt (long)
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short hundredweight
cwt (short)
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stone
st
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dram
dr
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grain
gr
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| Unit | Value | Actions |
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pound (troy)
lb t
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ounce (troy)
oz t
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pennyweight
dwt
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carat (troy)
ct t
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grain (troy)
gr t
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mite
mite
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doite
doite
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Common mass conversion mistakes
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The word 'ton' names three different weights: the metric tonne (1,000 kg), the US short ton (about 907 kg) and the UK long ton (about 1,016 kg). US sources almost always mean the short ton, older UK sources the long ton. Check which ton is meant before converting, they differ by up to 11%.
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The everyday avoirdupois ounce is about 28.35 g, but precious metals are priced in troy ounces of about 31.10 g. An 'ounce of gold' is nearly 10% heavier than an ounce of flour. Use troy ounces for gold and silver, the regular ounce for everything else.
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The 'just double it' shortcut from kilograms to pounds hides a 10% error: a kilogram is about 2.205 lb, so 80 kg is 176 lb, not 160. Multiply by 2.2 instead: double the number, then add 10%.
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A stone is often assumed to be 10 pounds, but it is 14 pounds, about 6.35 kg. A body weight of '12 stone' is therefore about 76 kg, not 54 kg. Multiply stone by 6.35 to get kilograms.
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The carat used for gemstones is a unit of mass: exactly 0.2 g, so a 5-carat diamond weighs 1 gram. The karat used for gold is something else entirely, a purity scale where 24k is pure gold and 18k is 75% gold. The two cannot be converted into each other.
Quick conversion quiz
Score:
0
15.4 gram equals 23 100 milligram.
Correct answer: 15.4 gram = 15 400 milligram.
2.7 kilogram equals 1 620 gram.
Correct answer: 2.7 kilogram = 2 700 gram.
22.3 gram equals 0.0223 kilogram.
Correct answer: 22.3 gram = 0.0223 kilogram.
197 gram equals 0.197 kilogram.
Correct answer: 197 gram = 0.197 kilogram.
41 kilogram equals 41 000 gram.
Correct answer: 41 kilogram = 41 000 gram.
Definitions
kilogram (kg)
The SI base unit of mass. Defined by Planck's constant.
The kilogram is the base unit of mass in the International System of Units (SI). Until 2019, it was defined by a physical artifact (Le Grand K). It is now defined by fixing the numerical value of the Planck constant.
gram (g)
1/1000 of a kilogram. Standard unit for small masses.
The gram is a metric unit of mass equal to one thousandth of a kilogram. It was originally defined as the mass of one cubic centimeter of pure water at 4 °C.
carat (ct)
Unit for gemstones, equal to 200 mg.
The metric carat is a unit of mass used for measuring gemstones and pearls. Since 1907, it has been internationally standardized as exactly 200 milligrams.
long ton (long ton)
British ton, 2240 pounds (approx 1016 kg).
The long ton (imperial ton) is a British unit of mass equal to 2,240 pounds (1,016 kg). It is heavier than both the metric tonne and the US short ton.
short ton (short ton)
US ton, 2000 pounds (approx 907 kg).
The short ton is a unit of mass common in the United States. It is equal to 2,000 pounds (approx. 907 kg).
pound (lb)
Imperial/US unit. Exactly 0.45359237 kg.
The pound (avoirdupois) is a unit of mass used in the imperial and US customary systems. Since 1959, the international pound has been defined as exactly 0.453 592 37 kilograms.
ounce (oz)
Imperial/US unit. 1/16 of a pound.
The ounce (avoirdupois) is a unit of mass equal to 1/16 of a pound, or approximately 28.35 grams. It should not be confused with the 'fluid ounce', which is a unit of volume.
Frequently asked questions
How many pounds are in a kilogram?
1 kilogram is about 2.20462 pounds. Multiply kg by 2.20462 to get lb.
How many kilograms are in a pound?
1 pound is exactly 0.45359237 kilograms. Multiply lb by 0.45359237 to get kg.
How many grams are in a kilogram?
There are exactly 1000 grams in 1 kilogram.
How many grams are in a pound?
One pound is about 453.592 grams.
What is the difference between a ton, tonne, and metric ton?
A t (metric ton) is 1000 kg. A US short ton is 2000 lb (about 907.185 kg). A UK long ton is 2240 lb (about 1016.047 kg).
What is the difference between mass and weight?
Mass is the amount of matter (kg). Weight is the force due to gravity (newtons). Your mass stays the same, but your weight changes with gravity.
How do I use the mass converter on konvertera.nu?
Enter your value (like pounds), pick the target unit (like kg), and konvertera.nu will convert it instantly.
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