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Convert Weight and Mass Units Instantly

This converter features units that are still used today. There is also a special converter for historical units of weight you might want to visit for ancient, medieval and other old units that are no longer used.
Conversion is easy:
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This converter is very easy. Really.

1 Browse through the page and find the unit you want to convert from.
Type the value you are converting next to the unit.
2 Click the Convert button.
Your value gets instantly converted to all other units on the page.
3 Now find the unit you want and get the conversion result next to it. It's your answer.

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  1. Find your unit.
  2. Type your value next to it.
  3. Touch "Convert Me" and get all conversions.
? Conversion settings:
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Conversion settings explained.

First of all, you don't have to change any settings to use the converter. It's absolutely optional.

Number of significat figures

Do you want rounded off figures or scientifically precise ones? For everyday conversions we recommend choosing 3 or 4 significant digits. If you want maximum precision, set the number to 9

Digit groups separator

Choose how you want to have your digit groups separated in long numbers:

1234567.89none
1 234 567.89space
1,234,567.89comma
1.234.567,89point

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  • Significant figures:
  • Digit groups separator:
»

Troy

pound
ounce (ozt)
pennyweight (dwt)
carat
grain
mite
doite
»

Apothecaries

pound
ounce
dram
scruple
grain
»

Natural units

In physics, natural units are physical units of measurement based only on universal physical constants. The origin of their definition comes only from properties of nature and not from any human construct.
Planck mass (M)
»

Chinese units of 1915 before 1930

jin (斤)
liang (兩)
qian (錢)
fen (分)
li (釐)
hao (毫)
»

Thai units

Some of these units are still in use even though metric system was formally established in 1923. Before the metrication the old units were standartied to exact metric values. The baht (current Thai currency) originated as a corresponding measure of silver. The smaller units in this section were corresponding silver coins.
hap (หาบ)
chang (ชั่ง)
tamlueng (ตำลึง)
baht (บาท)
baht in gold trading
mayon/mayong (มายน/มะยง)
salueng (สลึง)
fueang (เฟื้อง)
seek (ซีก)
siao/pai (เสี้ยว/ไพ)
ath (อัฐ)
solos (โสฬส)
bia (เบี้ย)

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! The conversion is approximate.
Either the unit does not have an exact value,
or the exact value is unknown.
? Is it a number? Sorry, can't parse it. sorry (?) Sorry, we don't know this substance. Please pick one from the list. *** Please choose the substance.
It affects conversion results.
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Has convert-me.com really existed since 1996? In fact it's even older. We launched the first version of our online units converter in 1995. There was no JavaScript there and all conversions had to be done on server. The service was slow. A year later the technology allowed us to create an instant units conversion service that became the prototype of what you see now.
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