Auto Unit
Converter

Convert every automotive unit in one place: km↔miles, L/100km↔MPG, km/h↔mph, PSI↔kPa↔bar, °C↔°F and Nm↔lb-ft. Type in either field.

Distance

Kilometers (km)

Miles (mi)

Speed

Kilometers/hour

Miles/hour

Fuel consumption

L / 100 km

MPG (US)

MPG (UK)

Tire pressure

PSI

kPa

bar

Temperature

°C

°F

Torque

Newton-meters (Nm)

Pound-feet (lb-ft)

L/100km vs MPG

Europe measures liters per 100 km; the US and UK use miles per gallon. 7 L/100km ≈ 33.6 US mpg ≈ 40.3 UK mpg.

Tire pressure matters

Under-inflated tires raise consumption and wear. Typical pressure: 30–36 PSI (207–248 kPa / 2.1–2.5 bar).

Normal engine temp

Most engines run around 90°C (194°F). Overheating or a stuck thermostat usually shows up here first.

FAQ

Auto unit FAQ

How do I convert L/100km to MPG?

Divide 235.215 by the L/100km value for US mpg, or 282.48 for UK (Imperial) mpg. Example: 7 L/100km = 33.6 US mpg = 40.3 UK mpg.

What is the difference between US and UK MPG?

The US gallon and the Imperial (UK) gallon are different sizes (3.79 L vs 4.55 L), so the same car shows different mpg figures. This converter handles both.

How many km are in a mile?

1 mile = 1.60934 km. To convert miles to km, multiply by 1.609; to convert km to miles, divide by 1.609.

What is a good tire pressure in PSI and kPa?

Typical car tire pressure is 30–36 PSI (207–248 kPa, 2.1–2.5 bar). Check the sticker on your door frame for the exact value.

How do I convert Nm to lb-ft?

Multiply Nm by 0.7376 to get lb-ft. Example: 250 Nm = about 184 lb-ft of torque.

How do I convert km/h to mph?

Divide km/h by 1.609. 100 km/h ≈ 62 mph. Multiply mph by 1.609 to go the other way.

Why is fuel consumption measured in L/100km in Europe?

L/100km is intuitive for cost: multiply by fuel price per liter and divide by 100 to get cost per km. MPG is a distance-per-volume measure used in the US and UK.

What temperature scale do cars use?

Most of the world uses Celsius; the US uses Fahrenheit. Engine normal operating temperature is about 90°C (194°F).

Fuel cost→

Turn your L/100km into a real annual cost.

Tire size→

Compare tire sizes & speedometer error.

OBD-II codes→

Decode check engine lights for free.

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