Answer #1
How many mg in 1 mcg? The answer is 0.001.
mcg is 1 millionth of a gram. mg is the symbol for milligram, 1 thousandth of a gram.
For example:
100 micrograms = 0.1 milligram
1000 micrograms = 1 mg
Answer #2ERROR! ------ 1 MCG IS not "1 millionth of a gram", AS STATED ABOVE.1 mcg is one THOUSANDTH of a gram. One Thousand mcg equals One milligram.
Answer #3Nope, the first guy is right (answer #1). Your confusion (answer #2) is probably becauseThis may seem counter-intuitive because "milli" is pretty close to "million", but the nomenclature doesn't work exactly the same with small parts.
Another reason you are making this mistake is a "milli-" of something, gram in this case, is written out as 0.001 which intuitively seems to be more like 100 than 1,000 parts. All of this stems to the very beginning of the SI prefix chart.
If we start with the number 1 and move the decimal place one to the LEFT, we get a "deca-" and it is shown as 10. If we instead move the decimal one to the RIGHT we get 0.1, NOT 0.01. That is where your brain is confusing everything. Just remember the decimal is one place less than you think it is when you go smaller than 0. So centi- is a hundredth so we might think it is 0.001 when actually it is 0.01. And nano- is a billionth, but it is not 0.000 000 000 1, it's 0.000 000 001.
1 mcg is NOT a thousandth of a gram.
1 mcg = 1 microgram = 1 µgram
1 mcg = 1x10-6 grams = 1/1,000,000 gram = 1 millionth of a gram
To further clear up confusion, it may be beneficial to have comparison benchmarks:
100 n/a n/a One
10-1 d deci- Tenth
10-2 c centi- Hundredth
10-3 m milli- Thousandth
10-6 µ (mc)micro- Millionth
10-9 n nano- Billionth
10-12 p pico- Trillionth
10-15 f femto- Quadrillionth
10-18 a atto- Quintillionth
So using chart above which is RIGHT, we can see the first guy takes the difference of
g --> µg (mcg) (the "g" is the SI abbreviation for "gram")
1 of 100, which is 1.
And 1 of 10-6, which is .000001
Take the difference (6-0=6) and there is 1x10-6 or 1 million parts composing 1 part of the gram.
To get to thousands to millionths
milligrams --> micrograms
mg --> µg (mcg) (the "g" is the SI abbreviation for "gram")
m --> mc
1x10-3 --> 1x10-6
Take the difference (6-3=3) and we find there is 1x10-3 or 1 Thousand parts composing 1 part of the milligram.
Forty (40) 500mcg tablets are required to equal 20mg
I say 2.5 because 1 milligram = 1000 mcg and if you think about it 400 mcg (1 pill) +400 mcg (1 pill) = 800 mcg + 200 mcg (1/2 pill)= 1000 mcg
0.001mg per mcg
There are 1000mcg (micrograms) per milligram. * So, mg x 1,000 = mcg
2mg equals 2000mcg (1000mcg per mg).
10mg is equal to 10,000 micrograms (mcg).
Forty (40) 500mcg tablets are required to equal 20mg
One-half (1/2) tablet. 0.25 mg is equal to 250 mcg. So if you had a 500mcg tablet you would only need to take one-half (1/2) tablet for the correct dose.
One-half (1/2) tablet. 0.25 mg is equal to 250 mcg. So if you had a 500mcg tablet you would only need to take one-half (1/2) tablet for the correct dose.
1 mg is equal to 1000 mcg
2.4 grams equal 2400 mg
215mcg equates to 0.215mg
3,333.33
I say 2.5 because 1 milligram = 1000 mcg and if you think about it 400 mcg (1 pill) +400 mcg (1 pill) = 800 mcg + 200 mcg (1/2 pill)= 1000 mcg
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To convert grams to micrograms, multiply by a million.