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| Multiply number of | by | to get equivalent number of: |
| Inches | 25.4 | Millimeters |
| Feet | 0.3048 | Metres |
| Millimeters | 0.0394 | Inches |
| Metres | 3.281 | Feet |
| Square Metres | 10.7639 | Square Feet |
| Square Feet | 0.0929 | Square Metres |
| Cubic Feet | 0.0283 | Cubic Metres |
| Litres | 0.0353 | Cubic Feet |
| Cubic Feet | 28.317 | Litres |
| Litres | 0.2642 | U.S. Gallons |
| U.S. Gallons | 3.785 | Litres |
| Litres | 0.22 | U.K. Gallons |
| U.K Gallons | 4.5461 | Litres |
| U.K. Gallons | 1.2001 | U.S. Gallons |
| U.S. Gallons | 0.8327 | U.K.Gallons |
| Kilograms | 2.2046 | Pounds |
| Pounds | 0.4536 | Kilograms |
| Long Tons | 1.01605 | Tonnes |
| Tonnes | 0.9842 | Long Tons |
| Bar | 14.504 | PSI |
| PSI | 0.06895 | Bar |
| Inches HG | 0.4912 | PSI |
| PSI | 2.036 | Inches HG |
| KG/Square centimeter | 14.223 | PSI |
| PSI | 0.0703 | KG/Square centimeter |
| KG/Square centimeter | 0.9807 | Bar |
| Bar | 1.02 | Kg/Square centimeter |
| KG/Square centimeter | 28.976 | Inches HG |
| Inches HG | 0.0345 | KG/Square centimeter |
| Degrees Fahrenheit | 5/9 after subtracting 32 | Degrees Celcius |
| Degrees Celcius | 9/5 and add 32 | Degrees Fahrenheit |