A knot is one nautical mile per hour.
Knots to Yard per Days Converter — kn to yd/d
Convert Knots (kn) to Yard per Days (yd/d) using the exact conversion factor (1 knots = 48,608.92388 yard per days). See the formula, worked examples, conversion table, history, and common uses.
Knots to Yard per Days converter
Converter
Speed Converter
Convert road, aviation, marine, lab, and scientific speed units.
Context values
Some unit families need one extra value for a physically accurate result.
Distance divided by time.
Result = input x 0.5144444444 / 1.05833333e-5.
Speed uses meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Knots to Yard per Days
Knots and Yard per Days both describe speed, and the conversion matters whenever a maritime or aviation speed (knots) needs to be compared against a road speed (mph). Knots is most often used for ship and boat speed in marine navigation.
Formula
yard per days = knots × 48608.9238845
This factor comes from each unit's defined relationship to the category's base unit: 1 knots equals 0.514444444444 base units, and 1 yard per days equals 0.0000105833333333 base units, so dividing one by the other gives the direct knots-to-yard per days factor of 48608.9238845.
Simple example
1 kn × 48608.92388 = 48,608.92388 yd/d
1 knots = 48,608.92388 yard per days.
Real-world example
10 kn × 48608.92388 = 486,089.2388 yd/d
10 knots = 486,089.2388 yard per days.
Conversion table
| Knots (kn) | Yard per Days (yd/d) |
|---|---|
| 1 kn | 48,608.92388 yd/d |
| 5 kn | 243,044.6194 yd/d |
| 10 kn | 486,089.2388 yd/d |
| 25 kn | 1,215,223.097 yd/d |
| 50 kn | 2,430,446.194 yd/d |
| 100 kn | 4,860,892.388 yd/d |
Reverse conversion: Yard per Days to Knots
1 yd/d × 0.00002057235421 = 0.0000205724 kn
1 yard per days = 0.0000205724 knots.
knots = yard per days × 0.0000205723542117
For a page dedicated to this direction, see Yard per Days to Knots.
Understanding the Knots
Knots (kn) measures speed. A knot is one nautical mile per hour; since the nautical mile is exactly 1,852 meters, a knot is exactly 1,852/3,600 m/s. It is classified as a Non-SI unit accepted for use with SI (maritime/aviation).
Where it's used: Used internationally in maritime navigation and aviation
Uses of the Knots today
- Ship and boat speed in marine navigation
- Aircraft airspeed and wind speed reporting in aviation
- Marine weather forecasts (wind speed)
History of the Knots
The knot gets its name from an old nautical method of measuring speed: sailors trailed a 'log line' with evenly spaced knots behind a ship and counted how many knots paid out over a fixed time, giving a direct speed reading in 'knots.'
The nautical mile it's based on was itself standardized internationally in 1929 (the International Nautical Mile, 1,852 m exactly), tying the knot to a precise value still used in shipping and aviation today.
Historical origin. Knots was not the invention of a single named person; it developed through the process described above.
Understanding the Yard per Days (yd/d)
Distance divided by time.
Knots — sources
- BIPM SI Brochure — Non-SI units accepted for use with SI — Lists the knot among accepted non-SI speed units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many yard per days are in 1 knots?
1 knots equals 48,608.92388 yard per days, using the exact defined conversion factor rather than an estimate.
How do I convert knots to yard per days?
Multiply the knots value by 48608.92388. The converter above does this instantly to whatever precision you set.
How do I convert yard per days back to knots?
Use the reverse factor: 1 yard per days equals 0.0000205724 knots. You can also use the swap control in the converter above to flip the direction instantly.
What is a knots?
Knots (kn) measures speed. A knot is one nautical mile per hour; since the nautical mile is exactly 1,852 meters, a knot is exactly 1,852/3,600 m/s. It is classified as a Non-SI unit accepted for use with SI (maritime/aviation).
What is a yard per days?
Yard per Days (yd/d) is a unit of speed.
Is the knots to yard per days conversion exact?
Yes. A knot is one nautical mile per hour; since the nautical mile is exactly 1,852 meters, a knot is exactly 1,852/3,600 m/s. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
Where is the knots still used today?
Used internationally in maritime navigation and aviation