Loona Calculators
Convert miles per hour to kilometres per hour instantly — type any value and the result appears as you type. Below you will find the exact formula, a mph to km/h conversion table and a worked example.
Formula: Kilometres per hour = miles per hour × 1.60934 — the same factor as miles to kilometres.
Question: How many kilometres per hour is 70 mph — the UK motorway and a common US highway speed limit?
Steps: Take the value in miles per hour: 70 mph. Apply the formula: Kilometres per hour = miles per hour × 1. That gives 70 → 112.6538 km/h (rounded to four decimal places).
Result: 70 mph = 112.6538 km/h.
| Miles per Hour (mph) | Kilometres per Hour (km/h) |
| 10 mph | 16.0934 km/h |
| 20 mph | 32.1868 km/h |
| 30 mph | 48.2802 km/h |
| 40 mph | 64.3736 km/h |
| 50 mph | 80.467 km/h |
| 60 mph | 96.5604 km/h |
| 65 mph | 104.6071 km/h |
| 70 mph | 112.6538 km/h |
| 80 mph | 128.7472 km/h |
| 90 mph | 144.8406 km/h |
| 100 mph | 160.934 km/h |
Need a value that is not in the table — or the reverse direction? Use the converter at the top of this page or the km/h to mph converter, or the full Unit Converter for every unit in one place.
Multiply the value in miles per hour by 1.6093: mph × 1.6093 = km/h. For example, 10 mph × 1.6093 = 16.0934 km/h. The converter above does this instantly.
Exactly 1.6093 km/h (to four decimal places). The full relationship: Kilometres per hour = miles per hour × 1.
60 mph = 96.5604 km/h — just under 100 km/h.
Use the reverse conversion — our km/h to mph converter does it instantly. For a quick check, divide by the same factor instead of multiplying.
Cars sold in the US and UK must show mph, but because the same models are sold in metric countries, most dials (and digital displays) also carry km/h.
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