Speed Converter
Speed conversion workspace
Enter a decimal, fraction or quick calculation — for example 12.5, 3/8 or (12*4)+6.5.
Batch conversionconvert up to 100 values at once
No values yet.
Compare all speed units
One input, every supported equivalent. Select any row as the main target.
| Unit | Equivalent | Target action |
|---|---|---|
| Miles per Hour mph | 62.14 | TargetSelected |
| Kilometers per Hour km/h | 100 | SourceSource |
| Meters per Second m/s | 27.78 | |
| Knots kn | 54 |
Speed measures distance travelled per unit of time.
Sourced factorsFormula
value in target = value × source factor / target factor
Calculations use the central unit catalog and preserve precision until the result is formatted.
Common conversions
| Input | From | To | Result |
|---|---|---|---|
| 100 | Kilometers per Hour | Miles per Hour | 62.1371192237 |
Common speed conversions
Curated references with worked examples, formulas and the full interactive converter.
Frequently asked questions
What does one knot mean?
One knot is one nautical mile per hour. Because one international nautical mile is exactly 1,852 meters, one knot equals exactly 1.852 km/h.
Are the results rounded?
The calculation retains full JavaScript number precision; the precision control only formats the displayed result.
Accuracy & transparency
Sources & methodology
Calculations keep full numeric precision until display formatting. These references describe the definitions, variants or factors used; links do not imply affiliation.
SI definitions and published coefficients for selected non-SI units.
Reference factors and named variants for commonly used units, including US liquid cooking measures and British stone.
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