18 mg ≈ 1.8 × 10^-8 t. To convert milligrams to metric tonnes, divide by 1,000,000,000: 18 ÷ 1,000,000,000 = 1.8 × 10^-8.
How to convert milligrams to metric tonnes
t = mg × 1 × 10^-9
- 1 mg = 1 × 10^-9 t (and 1 t = 1,000,000,000 mg).
- Multiply the amount by the factor: 18 × 1 × 10^-9 = 1.8 × 10^-8.
- Answer: 18 mg ≈ 1.8 × 10^-8 t (rounded to 6 significant figures).
Shortcut: dividing by 1,000,000,000 gives the same result as multiplying by 1 × 10^-9.
Milligrams to Metric Tonnes table
| Milligrams (mg) | Metric Tonnes (t) |
|---|---|
| 13 mg | 1.3 × 10^-8 t |
| 14 mg | 1.4 × 10^-8 t |
| 15 mg | 1.5 × 10^-8 t |
| 16 mg | 1.6 × 10^-8 t |
| 17 mg | 1.7 × 10^-8 t |
| 18 mg | 1.8 × 10^-8 t |
| 19 mg | 1.9 × 10^-8 t |
| 20 mg | 2 × 10^-8 t |
| 21 mg | 2.1 × 10^-8 t |
| 22 mg | 2.2 × 10^-8 t |
| 23 mg | 2.3 × 10^-8 t |
| mg | t |
|---|---|
| 1 mg | 1 × 10^-9 t |
| 5 mg | 5 × 10^-9 t |
| 10 mg | 1 × 10^-8 t |
| 50 mg | 5 × 10^-8 t |
| 100 mg | 1 × 10^-7 t |
| 1,000 mg | 0.000001 t |