Convert Milligram to Teragram
Convert milligrams to teragrams instantly. 1 milligram = 1e-15 teragram — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Teragram to Milligram converter for the reverse conversion.
Units explained
Milligram
A milligram (mg) equals one-millionth of a kilogram, or 0.001 gram.
From the SI prefix 'milli-' (from Latin 'mille', thousand).
Standard for medicine dosing, nutrition labels, and fine jewelry.
Part of the original metric system of 1795.
Teragram
A teragram (Tg) equals 10^9 kilograms, or one million metric tons.
From the SI prefix 'tera-' (from Greek 'teras', monster).
Used in large-scale environmental and industrial mass accounting.
The tera- prefix entered the SI in 1960.
Milligram to Teragram conversion formula
The relationship between milligrams and teragrams:
To convert milligrams to teragrams, multiply the value in milligrams by 1e-15. To reverse, multiply teragrams by 1e+15.
How to use this converter
Type a value into the calculator. The result in teragrams updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Teragram to Milligram converter for the reverse direction.
Step-by-step: convert milligrams to teragrams
- Write down the value in milligrams (mg).
- Multiply that value by the factor 1e-15.
- The product is the equivalent value in teragrams (Tg).
- To reverse, multiply the teragram value by 1e+15.
Worked examples
Example 1 — Convert 1 mg to Tg:
1 × 1e-15 = 1e-15 Tg
Example 2 — Convert 100 mg to Tg:
100 × 1e-15 = 1e-13 Tg
Real-world example — Hair-width scale measurements
A 70-milligram measurement (about the diameter of a human hair) is the kind of value materials engineers regularly express in adjacent micro-scale units like teragrams for direct comparison across supplier datasheets.
70 mg × 1e-15 = 7e-14 Tg
Real-world example — Paper and film thicknesses
At the thickness of office paper (roughly 3 milligrams), converting between sub-millimeter units is routine for packaging and printing buyers comparing quotes from metric and US suppliers.
3 mg × 1e-15 = 3e-15 Tg
Real-world example — Plastic-film thickness alternates
A 150-milligram plastic film converts cleanly to teragrams — useful for packaging buyers reconciling supplier datasheets across metric and US measurement systems.
150 mg × 1e-15 = 1.5e-13 Tg
Milligram to Teragram conversion table
Standard reference values for converting milligrams to teragrams:
| Milligram [mg] | Teragram [Tg] |
|---|---|
| 0.01 | 1e-17 |
| 0.1 | 1e-16 |
| 1 | 1e-15 |
| 2 | 2e-15 |
| 3 | 3e-15 |
| 4 | 4e-15 |
| 5 | 5e-15 |
| 10 | 1e-14 |
| 20 | 2e-14 |
| 30 | 3e-14 |
| 40 | 4e-14 |
| 50 | 5e-14 |
| 100 | 1e-13 |
| 500 | 5e-13 |
| 1000 | 1e-12 |
Frequently asked questions
How many teragrams is 1 milligram?
How do I convert milligrams to teragrams?
How do I convert teragrams back to milligrams?
How many teragrams is 100 milligrams?
Popular weight unit conversions
Convert Milligram to other weight units
Show all Milligram conversions
Metric / SI (17 units)
Avoirdupois (15 units)
Troy & Apothecary (10 units)
Indian / South Asian (6 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 mg = 1e-15 Tg) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.