680 mg ≈ 6.8 × 10^-7 t. To convert milligrams to metric tonnes, divide by 1,000,000,000: 680 ÷ 1,000,000,000 = 6.8 × 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: 680 × 1 × 10^-9 = 6.8 × 10^-7.
- Answer: 680 mg ≈ 6.8 × 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) |
|---|---|
| 675 mg | 6.75 × 10^-7 t |
| 676 mg | 6.76 × 10^-7 t |
| 677 mg | 6.77 × 10^-7 t |
| 678 mg | 6.78 × 10^-7 t |
| 679 mg | 6.79 × 10^-7 t |
| 680 mg | 6.8 × 10^-7 t |
| 681 mg | 6.81 × 10^-7 t |
| 682 mg | 6.82 × 10^-7 t |
| 683 mg | 6.83 × 10^-7 t |
| 684 mg | 6.84 × 10^-7 t |
| 685 mg | 6.85 × 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 |