CONVERSION TOOLS

Unit Conversion Calculators

Maritime unit converters for distance, speed, temperature, pressure, volume, weight, fuel density and chart scale.

8Converters

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SI & ImperialAll units

All Conversion Calculators

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Distance Converter

Convert between nautical miles, statute miles, kilometres and metres

Distance

1 NM = 1.852 km = 1.15078 mi = 1852 m

Distance ValueFrom Unit (NM/km/mi/m)To Unit

Speed Converter

Convert speed between knots, miles per hour, kilometres per hour and m/s

Speed

1 kn = 1.852 km/h = 1.15078 mph = 0.5144 m/s

Speed ValueFrom Unit (kn/mph/kph/m/s)To Unit

Temperature Converter

Convert between Celsius, Fahrenheit and Kelvin temperature scales

Temperature

F = (C × 9/5) + 32 | K = C + 273.15 | C = (F − 32) × 5/9

Temperature ValueFrom Unit (°C/°F/K)To Unit

Pressure Converter

Convert pressure between bar, PSI, kPa, mbar, mmHg, atm and inHg

Pressure

1 bar = 100 kPa = 14.5038 PSI = 750.06 mmHg = 0.9869 atm

Pressure ValueFrom Unit (bar/PSI/kPa/mbar)To Unit

Volume Converter

Convert volume between litres, US gallons, imperial gallons and cubic metres

Volume

1 m³ = 1000 L = 264.172 US gal = 219.969 imp gal = 6.2898 bbl

Volume ValueFrom Unit (L/m³/US gal/bbl)To Unit

Weight Converter

Convert weight between metric tonnes, long tons, short tons and kilograms

Weight

1 MT = 1000 kg = 0.9842 LT = 1.1023 ST

Weight ValueFrom Unit (MT/LT/ST/kg/lb)To Unit

Fuel: Metric Tons to Barrels

Convert marine fuel between metric tonnes and barrels using fuel density

Fuel

Barrels = MT × 1000 ÷ (density kg/m³ × 0.158987)

Fuel Quantity (MT or bbl)Fuel TypeDensity (kg/m³)

Chart Scale Converter

Convert between chart scale ratio, distance on chart and actual distance

Charts

Actual Distance = Chart Distance × Scale Denominator

Chart Scale (1:X)Distance on Chart (mm/cm)Actual Distance (NM/km)

About Unit Conversion Calculators

Maritime operations involve both SI (metric) and Imperial units across navigation, engineering, and cargo operations. These converters cover all units commonly encountered by mariners worldwide — from nautical miles to kilometres for navigation to metric tonnes to long tons for cargo calculations.