Convert Milligram to Metric Ton
Convert milligrams to metric tons instantly. 1 milligram = 1e-9 metric ton — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Metric Ton 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.
Metric Ton
The metric ton (t) equals exactly 1,000 kilograms; it is also called the tonne.
From 'tun', a large medieval cask; 'metric' distinguishes it from imperial tons.
The global standard for trade, freight, and heavy industry.
Recognized internationally with the spread of the metric system in the late 19th century.
Milligram to Metric Ton conversion formula
The relationship between milligrams and metric tons:
To convert milligrams to metric tons, multiply the value in milligrams by 1e-9. To reverse, multiply metric tons by 1e+9.
How to use this converter
Type a value into the calculator. The result in metric tons updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Metric Ton to Milligram converter for the reverse direction.
Step-by-step: convert milligrams to metric tons
- Write down the value in milligrams (mg).
- Multiply that value by the factor 1e-9.
- The product is the equivalent value in metric tons (t).
- To reverse, multiply the metric ton value by 1e+9.
Worked examples
Example 1 — Convert 1 mg to t:
1 × 1e-9 = 1e-9 t
Example 2 — Convert 100 mg to t:
100 × 1e-9 = 1e-7 t
Real-world example — Feature-scale to long-haul
One billion milligrams equals exactly one metric ton — the conversion an optical-network engineer performs when totalling feature-level path lengths into a single long-haul fiber-link distance.
1e+9 mg × 1e-9 = 1 t
Real-world example — Fiber-optic link lengths
Converting from microscale milligrams to the metric tons of a long-haul fiber link is the conversion an optical engineer performs when calculating attenuation per kilometre of fiber.
1e+9 mg × 1e-9 = 1 t
Milligram to Metric Ton conversion table
Standard reference values for converting milligrams to metric tons:
| Milligram [mg] | Metric Ton [t] |
|---|---|
| 0.01 | 1e-11 |
| 0.1 | 1e-10 |
| 1 | 1e-9 |
| 2 | 2e-9 |
| 3 | 3e-9 |
| 4 | 4e-9 |
| 5 | 5e-9 |
| 10 | 1e-8 |
| 20 | 2e-8 |
| 30 | 3e-8 |
| 40 | 4e-8 |
| 50 | 5e-8 |
| 100 | 1e-7 |
| 500 | 5e-7 |
| 1000 | 1e-6 |
Frequently asked questions
How many metric tons is 1 milligram?
How do I convert milligrams to metric tons?
How do I convert metric tons back to milligrams?
How many metric tons 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-9 t) 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.