689 mg ≈ 6.89 × 10^-7 t. To convert milligrams to metric tonnes, divide by 1,000,000,000: 689 ÷ 1,000,000,000 = 6.89 × 10^-7.
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: 689 × 1 × 10^-9 = 6.89 × 10^-7.
- Answer: 689 mg ≈ 6.89 × 10^-7 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) |
|---|---|
| 684 mg | 6.84 × 10^-7 t |
| 685 mg | 6.85 × 10^-7 t |
| 686 mg | 6.86 × 10^-7 t |
| 687 mg | 6.87 × 10^-7 t |
| 688 mg | 6.88 × 10^-7 t |
| 689 mg | 6.89 × 10^-7 t |
| 690 mg | 6.9 × 10^-7 t |
| 691 mg | 6.91 × 10^-7 t |
| 692 mg | 6.92 × 10^-7 t |
| 693 mg | 6.93 × 10^-7 t |
| 694 mg | 6.94 × 10^-7 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 |