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Automotive
Convert HP to kW, PSI to bar, and MPG to L/100km for your car.
Speed
Imperial → Metric
Miles per Hour → Kilometers per Hour
1 mph = 1.609344 km/h
Knots → Miles per Hour
1 kn = 1.15078 mph
Knots → Kilometers per Hour
1 kn = 1.852 km/h
Miles per Hour → Knots
1 mph = 0.868976 kn
Miles per Hour → Meters per Second
1 mph = 0.44704 m/s
Feet per Second → Meters per Second
1 ft/s = 0.3048 m/s
Feet per Second → Miles per Hour
1 ft/s = 0.681818 mph
Miles per Hour → Feet per Second
1 mph = 1.46667 ft/s
Metric → Imperial
Kilometers per Hour → Miles per Hour
1 km/h = 0.621371 mph
Kilometers per Hour → Knots
1 km/h = 0.539957 kn
Meters per Second → Kilometers per Hour
1 m/s = 3.6 km/h
Meters per Second → Miles per Hour
1 m/s = 2.23694 mph
Kilometers per Hour → Meters per Second
1 km/h = 0.277778 m/s
Meters per Second → Feet per Second
1 m/s = 3.28084 ft/s
Pressure
Imperial → Metric
Pounds per Square Inch → Bar
1 PSI = 0.0689476 bar
Pounds per Square Inch → Kilopascals
1 PSI = 6.89476 kPa
Pounds per Square Inch → Megapascals
1 PSI = 0.00689476 MPa
Metric → Imperial
Bar → Pounds per Square Inch
1 bar = 14.5038 PSI
Kilopascals → Pounds per Square Inch
1 kPa = 0.145038 PSI
Megapascals → Pounds per Square Inch
1 MPa = 145.038 PSI
Fuel Economy
Imperial → Metric
Miles per Gallon (US) → Liters per 100 km
L/100km = 235.215 ÷ MPG (US)
Miles per Gallon (UK) → Liters per 100 km
L/100km = 282.481 ÷ MPG (UK)
Metric → Imperial
Liters per 100 km → Miles per Gallon (US)
MPG (US) = 235.215 ÷ L/100km
Liters per 100 km → Miles per Gallon (UK)
MPG (UK) = 282.481 ÷ L/100km
Power
Imperial → Metric
Horsepower (Mechanical) → Kilowatts
1 hp = 0.7457 kW
Metric → Imperial
Kilowatts → Horsepower (Mechanical)
1 kW = 1.34102 hp
Torque
Imperial → Metric
Pound-Feet → Newton-Meters
1 lb-ft = 1.35582 Nm
Metric → Imperial
Newton-Meters → Pound-Feet
1 Nm = 0.737562 lb-ft
Energy
Imperial → Metric
Calories → Joules
1 cal = 4.184 J
Kilocalories → Kilojoules
1 kcal = 4.184 kJ
BTU → Joules
1 BTU = 1055.06 J
Metric → Imperial
Joules → Calories
1 J = 0.239006 cal
Kilojoules → Kilocalories
1 kJ = 0.239006 kcal
Joules → BTU
1 J = 0.000947817 BTU
Kilowatt-hours → Joules
1 kWh = 3,600,000 J
Joules → Kilowatt-hours
1 J = 0.00000027778 kWh
Force
Imperial → Metric
Pound-force → Newtons
1 lbf = 4.44822 N
Pound-force → Kilonewtons
1 lbf = 0.00444822 kN
Metric → Imperial
Newtons → Pound-force
1 N = 0.224809 lbf
Kilonewtons → Pound-force
1 kN = 224.809 lbf
Newtons → Kilonewtons
1 kN = 1000 N
Kilonewtons → Newtons
1 kN = 1000 N
Density
Imperial → Metric
Pounds per Cubic Foot → Kilograms per Cubic Meter
1 lb/ft³ = 16.0185 kg/m³
Pounds per Cubic Inch → Grams per Cubic Centimeter
1 lb/in³ = 27.6799 g/cm³
Metric → Imperial
Kilograms per Cubic Meter → Grams per Cubic Centimeter
1 kg/m³ = 0.001 g/cm³
Grams per Cubic Centimeter → Kilograms per Cubic Meter
1 g/cm³ = 1000 kg/m³
Kilograms per Cubic Meter → Pounds per Cubic Foot
1 kg/m³ = 0.062428 lb/ft³
Grams per Cubic Centimeter → Pounds per Cubic Inch
1 g/cm³ = 0.0361273 lb/in³