1 c equals 580,000,000 kn. Use the converter below or explore all speed conversions.
Converting Speed of Light to Knot is a common speed conversion. One speed of light (c) equals 580,000,000 knot (kn). Celsius is used in most countries worldwide and in all scientific applications.
This conversion is commonly needed for driving and speed limit compliance, running and fitness tracking, aviation and flight planning. Knots are the standard speed unit in maritime and aviation worldwide.
To put speed of light in perspective: water freezes (0 °C). In knot, common references include a cruise ship (about 20 kn).
The Celsius scale was invented by Swedish astronomer Anders Celsius in 1742, but he originally set 0° as boiling and 100° as freezing — it was later reversed.
The term 'knot' originated from counting knots on a rope trailing behind a ship over a fixed time period.
People frequently convert between speed of light and knot for:
| Speed of Light (c) | Knot (kn) |
|---|---|
| 1 c | 580,000,000 kn |
| 2 c | 1,200,000,000 kn |
| 5 c | 2,900,000,000 kn |
| 10 c | 5,800,000,000 kn |
| 15 c | 8,700,000,000 kn |
| 20 c | 12,000,000,000 kn |
| 25 c | 15,000,000,000 kn |
| 30 c | 17,000,000,000 kn |
| 50 c | 29,000,000,000 kn |
| 100 c | 58,000,000,000 kn |
| 200 c | 120,000,000,000 kn |
| 500 c | 290,000,000,000 kn |
| 1000 c | 580,000,000,000 kn |