Automotive Converter
Convert speed, distance, and fuel efficiency for vehicles
You're shopping for used cars online from different countries. One listing says '5.2 liters per 100 km' fuel economy, another says '45 mpg.' You have no idea which is more efficient. Speed limits are in kilometers per hour, your car's odometer might show mph, and tire pressure specs use bar while your pump displays psi.
View full converter + formula + examples →1 Mile per Hour = 1.6093 Kilometer per Hour
Context
Automotive specifications vary wildly by region, and misunderstandings can be expensive. Fuel economy is measured as miles per gallon (mpg) in the US but liters per 100 kilometers (l/100km) in Europe—and they measure in opposite directions (higher mpg is better; lower l/100km is better). Speed and distance are in miles or kilometers depending on where the car was built. Tire pressure is specified in psi, bar, or kg/cm², and getting it wrong affects safety, fuel economy, and tire wear.
When buying a car internationally, comparing efficiency is impossible without conversion. When driving in a different country, understanding speed limits and calculating remaining range matters for safety. Checking tire pressure requires conversion between the spec and your pump's gauge. Whether you're an automotive enthusiast comparing vehicles or a traveler renting a car abroad, these conversions are essential for making informed decisions and maintaining your vehicle safely.
All Automotive Converter Conversions
Why this matters
Comparing fuel economy between US and European cars
A US car gets 30 mpg; a European car is rated at 7.8 liters per 100 km. Which is more efficient? You need to convert to compare.
Understanding tire pressure specifications
Your car's manual says 32 psi, but the gas station pump shows bar. You need to convert to inflate tires to the correct pressure.
Calculating fuel range and trip costs
A cross-country trip is 1000 km. Your car's fuel economy is listed in mpg. You need to convert distance and efficiency to estimate fuel cost.
Checking odometer and speed in unfamiliar units
You're driving a car with an odometer in miles, but speed limits and distance signs are in kilometers. You need conversions to understand your speed and remaining distance.
Frequently asked
One car gets 30 mpg, another uses 7.8 liters per 100 km. Which is more efficient? →
The car rated at 7.8 l/100km is more efficient (about 30.1 mpg). Use [Miles Per Gallon to Liters Per 100km](/fuel/mpg-to-l100km/) to compare. Remember: higher mpg is better, but lower l/100km is better. This conversion helps when shopping internationally.
My tire pressure spec is 32 psi, but the pump shows bar. How many bar is that? →
32 psi is approximately 2.2 bar. Use [PSI to Bar](/pressure/psi-to-bar/) for tire pressure conversions. Tire pressure directly affects fuel economy, handling, and safety—inflate to the spec, not just to feel firm.
How far is 500 km in miles? I'm planning a road trip. →
500 km is approximately 311 miles. Use [Kilometers to Miles](/length/km-to-miles/) for distance. This helps estimate driving time (typically 60 mph = 97 km/h on highways) and plan fuel stops.
My car's fuel economy is 35 mpg. How many liters per 100 km is that? →
35 mpg is approximately 6.7 liters per 100 km. Use [Miles Per Gallon to Liters Per 100km](/fuel/mpg-to-l100km/) to match European efficiency standards or compare with international cars.
The speed limit is 90 km/h. What's that in mph? →
90 km/h is approximately 56 mph. Use [Kilometers Per Hour to Miles Per Hour](/speed/kmh-to-mph/) for speed limit conversions. Most highway limits are 90–130 km/h (56–81 mph) in Europe, 55–75 mph (89–121 km/h) in the US.
How much does a car weigh if it's rated at 1500 kg in Europe but I'm used to thinking in pounds? →
1500 kg is approximately 3,307 pounds. Use [Kilograms to Pounds](/weight/kg-to-lbs/) for vehicle weights. This matters for towing capacity, load limits, and understanding vehicle specs when comparing cars across regions.