Convert Milligram (mg) (mg) to Ounce (oz) (oz)
Category: Mass
1 mg = 3.5E-05 oz
High-precision rounding: 6 decimals
How to convert milligram (mg) to ounce (oz)
We convert by pivoting through the SI base unit for Mass and applying exact factors where applicable.
Share this conversion: /convert/milligram-to-ounce
Quick conversion table
Handy values for Milligram (mg) → Ounce (oz). Click a value to open that exact result.
Conversion formula
Linear unit conversions use standardized factors; many are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).
Common mistakes
- Confusing mass (lb) with force (lbf) in engineering contexts.
- Mixing metric tonnes (t) with short/long tons.
Unit facts
- Milligram (mg): A milligram is 1/1,000,000 of a kilogram; used in pharma and lab work.
- Ounce (oz): An ounce (avoirdupois) is exactly 28.349523125 g. Note: precious metals use the troy ounce (~31.1035 g).
About Mass
Mass quantifies the amount of matter. The kilogram is defined by Planck’s constant, which anchors mass to fundamental physics. In practice, grams and pounds dominate everyday use—from recipes and parcels to body weight—while tonnes and long tons appear in logistics and industry.
About Milligram (mg)
Milligram (mg)
Equals 1/1,000,000 kg. Used for dosages, trace contaminants, gemstones, and fine powders. Requires calibrated balances for accuracy.
History: Common in analytical chemistry and pharmacology as instrumentation reached sub-milligram readability.
About Ounce (oz)
Ounce (oz)
Equals 1/16 lb; exactly 28.349523125 g. Used for portions, postage, and precious metals (note: troy ounce differs).
History: Medieval trade used multiple ounces; today the avoirdupois ounce dominates in retail while troy ounce survives in bullion markets.