I'm driving in Europe and the limit is 80 km/h. Is that fast or slow?

80 km/h = 49.7 mph. That's moderately slow—typical for smaller roads outside cities. US equivalent would be 45-55 mph.

A German highway sign says 130 km/h. What's my speed limit in mph?

130 km/h = 80.8 mph. That's typical for German motorways; it's faster than most US interstate limits (65-75 mph). For the reverse, use [mph to km/h](/speed/mph-to-kmh/).

How do I estimate km/h to mph mentally?

Rough estimate: multiply by 0.6 (or divide by 1.6). Example: 100 km/h × 0.6 = 60 mph. For precision, multiply by 0.621371.

I'm watching a Formula 1 race and the commentator says a car hit 340 km/h on a straight. What's that in mph?

340 km/h = 211.3 mph. That's the kind of top speed seen on long straights like Monza. For comparison, NASCAR top speeds on superspeedways peak around 200 mph, so F1 cars are genuinely in the same ballpark. For road speeds, see [mph to km/h](/speed/mph-to-kmh/).

Kilometers per Hour (km/h) to Miles per Hour (mph) Converter

Enter a value to instantly convert between speed units.

From

Precision4 dp

1 Kilometer per Hour = 0.6214 Mile per Hour

Key Formulas

Kilometer per Hour → Mile per Hour

mph = km/h × 0.621371

Mile per Hour → Kilometer per Hour

km/h = mph × 1.60934

Knot → Mile per Hour

mph = kn × 1.15078

Mile per Hour → Knot

kn = mph × 0.868976

Formula

mph = km/h × 0.621371

One kilometer per hour equals 0.621371 miles per hour. Kilometers per hour are used globally for speed limits and vehicle speeds. Miles per hour are used in the US, UK, and a few territories. Renting a car in France and watching the speedometer read 130 while the motorway sign says 130 km/h — that's the moment you need this conversion to know whether you're legal or flying past the limit.

Source: NIST SP 811, Table B.8

Frequently Asked Questions

Real-World Examples

Urban speed limit in Europe and most countries. Typical residential or city driving; much slower than US urban limits (25-35 mph).

50 km/h = 31.07 mph

European rural speed limit. Common on roads outside cities; roughly matches US 55 mph highway limits.

90 km/h = 55.92 mph

European highway speed limit. Standard on motorways/interstates across most of Europe.

120 km/h = 74.56 mph

High-speed train or race speed. Not a road speed; used in context of trains, racing, or extreme scenarios.

200 km/h = 124.27 mph

mph to kmh knots to mph mph to knots ms to kmh kmh to ms

Kilometers per Hour (km/h) to Miles per Hour (mph) Converter

Key Formulas

Formula

Frequently Asked Questions

Real-World Examples

Related Converters