840 ms = 0.84 s. To convert milliseconds to seconds, divide by 1,000: 840 ÷ 1,000 = 0.84.
How to convert milliseconds to seconds
s = ms × 0.001
- 1 ms = 0.001 s (and 1 s = 1,000 ms).
- Multiply the amount by the factor: 840 × 0.001 = 0.84.
- Answer: 840 ms = 0.84 s.
Shortcut: dividing by 1,000 gives the same result as multiplying by 0.001.
Milliseconds to Seconds table
| Milliseconds (ms) | Seconds (s) |
|---|---|
| 835 ms | 0.835 s |
| 836 ms | 0.836 s |
| 837 ms | 0.837 s |
| 838 ms | 0.838 s |
| 839 ms | 0.839 s |
| 840 ms | 0.84 s |
| 841 ms | 0.841 s |
| 842 ms | 0.842 s |
| 843 ms | 0.843 s |
| 844 ms | 0.844 s |
| 845 ms | 0.845 s |
| ms | s |
|---|---|
| 1 ms | 0.001 s |
| 5 ms | 0.005 s |
| 10 ms | 0.01 s |
| 50 ms | 0.05 s |
| 100 ms | 0.1 s |
| 1,000 ms | 1 s |