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Help & supplies
Use the numbers from your label and instructions. We check the math. We do not tell you what to take or what to mix.
Looking for BAC water?
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Check the product instructions first. A link is not advice to use it.
What to have ready
Start with the instructions for your exact product.
- The right liquid. Use the liquid named in those instructions. Not every product uses BAC water.
- A way to measure it. Check the scale and the marks on your device.
- A record of your numbers. Keep the label and your result together.
We may earn a commission. We don’t add a markup; you buy directly from our partner. For laboratory research only. Not for human consumption or veterinary use.
The supplier’s water is for lab research only. We do not decide which product you need.
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Privacymg and mcg converter
1 mg = 1,000 mcg. Multiply mg by 1,000, or divide mcg by 1,000. Type in either box to convert.
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Use a decimal point, without commas. Your last entry stays in this tab for this session. It also follows you to the same converter on the homepage. No account is needed.
Enter a mass in either field.
Check the relationship
| Milligrams | Micrograms |
|---|---|
| 0 mg | 0 mcg |
| 0.000001 mg | 0.001 mcg |
| 0.125 mg | 125 mcg |
| 0.5 mg | 500 mcg |
| 1 mg | 1000 mcg |
| 12 mg | 12000 mcg |
Mass is not volume or syringe units
mg and mcg both measure mass. Neither specifies mL or a U-100 marking unless the solution concentration is also known. This converter does not choose a dose or a preparation.
The conversion shifts decimal places in text, rather than rounding through binary floating-point arithmetic. It accepts up to 64 input characters and exponents from -100 to 100. Other site calculators have separate numeric display limits.
See NIST's SI prefix definitions, our calculation methodology and the vial-label guide.