Conversion Tables

Conversion Tables Formulas conversion metric imperial
Metric Imperial Conversion Tables

Metric-to-Imperial Conversion

Use these conversion tables to perform common conversions involving metric or imperial units of length, area, volume, weight, pressure, density, speed, flow rate, torque, temperature, and angles.

Of course, there are many automatic calculators online (where you just enter a value in the appropriate box and press the “calculate” button to convert to any unit of your choice) if you want to make your conversions faster. I am publishing this conversion guide here in a different view so it is easier to see the ratio between various units, to understand how big or small each unit is.

Don’t forget to also check out our comprehensive Glossary of Plumbing Terminology.

Length Units

100 Centimetres (cm) = 1000 Millimetres (mm) = 1 Metres (m) = 39.3700787402 Inches (in) = 3.280839895 Feet (ft) = 1.0936132983 Yards (yd)

Area Units

100 Square Centimetres (cm²) = 10000 Square Millimetres (mm²) = 0.01 Square Metres (m²) = 15.5000310001 Square Inches (in²) = 0.1076391158 Square Feet (ft²) = 0.0119599007 Square Yards (yd²)

Volume Units

1000 Cubic Centimetres (cm³) = 1000000 Cubic Millimetres (mm³) = 0.001 Cubic Metres (m³) = 61.0237440947 Cubic Inches (in³) = 0.0353094877 Cubic Feet (ft³) = 0.0013079931 Cubic Yards (yd³) = 33.8140565033 Fluid Ounces (Fl. Oz.) = 1.0000001 Litres (L) = 1.0567473317 Quarts (qt) = 0.2641720303 US Gallons (gal) = 0.219969258 UK Gallons (gal)

Weight Units

1 Kilograms (kg) = 1000 Grams (g) = 35.2739618563 Ounces (oz) = 2.2045855379 Pounds (lb) = 2.679528403 Troy Pounds (lb t) = 0.0011023108 Short Tons = 0.0010000001 Metric Tonnes

Pressure Units

1 Bars (bar) = 0.1 Megapascal (MPa) = 100 Kilopascal (kPa) = 1.0196798205 Kilogram per Square Centimeter (kg/cm²) = 14.5037737797 Pounds per Square Inch (lb/in²) = 29.4985250737 Inches of Mercury (inHg) = 33.4448160535 Feet H₂0 = 400 Inches H₂0 = 0.1 Newtons per Square Millimetre (N/mm²) = 0.98697197 Standard Atmosphere (atm)

Density Units

100 Pounds per Cubic Foot (lb/ft³) = 0.0578703704 Pounds per Cubic Inch (lb/in³) = 1601.8463367839 Kilogram per Cubic Metre (kg/m³) = 0.0016018453 Kilogram per Cubic Centimetre (kg/cm³) = 1.6018463368 Grams per Cubic Centimetre (g/cm³)

Speed Units

1 Metres per Second (m/s) = 39.3700787402 Inches per Second (in/s) = 3.280839895 Feet per Second (ft/s) = 196.8503937008 Feet per Minute (ft/min) = 11811.0236173972 Feet per Hour (ft/hr)

Flow Rate Units

10 Cubic Feet per Minute (ft³/min) = 0.1666666667 Cubic Feet per Second (ft³/s) = 16.9894665308 Cubic Metres per Hour (m³/hr) = 0.2831681991 Cubic Metres per Minute (m³/min) = 0.0047194753 Cubic Metres per Second (meters³/sec) = 74.794315632 US Gallons per Minute (gal/min) = 62.288328687 UK Gallons per Minute (gal/min)

Torque Units

1 Pound-feet (lb·ft) = 12.0004800192 Pound-inches (lb·in) = 0.1382399292 Metre-kilogram (kg·m) = 1.3557483731 Newton Metres (N·m)

Temperature Units

80 Degrees Fahrenheit (°F) = 26.6666666667 Degrees Celsius (°C) = 299.6666666667 Kelvin (K)

C = (F – 32) / 1.8
F = 1.8 * C + 32

Angular Units

1800 Degrees = 3.1415915303 Radians

Time

1 year (not a leap year) = 12 months = 52.1786 weeks = 365.25 days = 8,766 hours = 525,960 minutes = 31,557,600 seconds

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