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| Length | |||||
| μm | mm | cm | m | in | ft |
| 1 | 1x10-3 | 1x10-4 | 1x10-6 | 3.94x10-5 | 3.28x10-6 |
| 1000 | 1 | 0.1 | 1x10-3 | 3.94x10-2 | 3.28x10-3 |
| 1x104 | 10 | 1 | 1x10-2 | 3.94x10-1 | 3.28x10-2 |
| 1x106 | 1x103 | 100 | 1 | 3.94x10 | 3.28 |
| 2.54x104 | 25.4 | 2.54 | 2.54x10-2 | 1 | 8.33x10-2 |
| 3.05x105 | 3.05x102 | 3.05x10 | 3.05x10-1 | 12 | 1 |
| Volume | |||||
| cm2 | L | M3(KI) | ft3 | gal(UK) | gal(US) |
| 1 | 1X10-3 | 1X10-6 | 3.53x10-5 | 2.2x10-4 | 2.64x10-4 |
| 1000 | 1 | 1X10-3 | 3.52x10-2 | 0.22 | 0.264 |
| 1X10 | 1000 | 1 | 353 | 220 | 264 |
| 2.83X104 | 28.3 | 2.83X10-2 | 1 | 0.623 | 0.749 |
| 4.55X103 | 4.55 | 4.55x10-3 | 1.6 | 1 | 1.2 |
| 3.79X103 | 3.79 | 3.79x10-3 | 1.34 | 0.833 | 1 |
| Pressure | ||||||
| Kpa | Bar | kg/cm2 | ib/in2(p,si) | Atm | MHg | MH2o(mAg) |
| 1 | 0.01 | 0.01 | 0.145 | 9.87x103 | 7.5x10-3 | 0.102 |
| 100 | 1 | 1.02 | 14.5 | 0.987 | 0.75 | 10.2 |
| 98.07 | 0.981 | 1 | 14.22 | 0.968 | 0.736 | 10.01 |
| 6.89 | 0.069 | 0.07 | 1 | 0.068 | 0.052 | 0.704 |
| 1.01x102 | 1.013 | 1.033 | 14.7 | 1 | 0.76 | 10.34 |
| 1.33x102 | 1.33 | 1.36 | 19.3 | 1.32 | 1 | 13.61 |
| 9.807 | 0.098 | 0.1 | 1.42 | 0.097 | 0.073 | 1 |
| Flow Rate | ||||||
| L/min | m3/min | m3/h | in3/h | ft3/h | (US)gal/min | (UK)gal/min |
| 1 | 0.001 | 0.06 | 3.66x103 | 2.12 | 0.264 | 0.22 |
| 1000 | 1 | 60 | 3.66x106 | 2.12x103 | 264 | 220 |
| 16.67 | 0.017 | 1 | 6.10x104 | 35.3 | 4.4 | 3.67 |
| 2.73x10-4 | 2.7x10-7 | 1.64x10-5 | 1 | 5.79x10-4 | 7.22x10-5 | 60.1x10-5 |
| 0.472 | 4.72x104 | 0.028 | 1.728 | 1 | 0.125 | 0.104 |
| 3.79 | 0.004 | 0.227 | 1.39x104 | 8.02 | 1 | 0.833 |
| 4.55 | 0.005 | 0.273 | 1.66x104 | 9.63 | 1.2 | 1 |
| Water Flow and Matched Pipe Diameter | Water Flow and Matched Pipe Diameter | ||||||||
| Pipe Diameter | Steel Pipe | Flow Rate(L/min) based on Pipe 10M & Press damage 0.01-0.03mpa | Pipe Diameter | Steel Pipe | Flow Rate(L/min) based on Pipe 10M & Press damage 0.01-0.03mpa | ||||
| A | B | Int.D | Ext.D | A | B | Int.D | Ext.D | ||
| 6A | 1/8B | 6.5 | 10.5 | 1.3-2.2 | 40A | 1-1/2B | 41.6 | 48.6 | 120-210 |
| 8A | 1/4B | 9.2 | 13.8 | 3-5.2 | 50A | 2B | 52.9 | 60.5 | 215-370 |
| 10A | 3/8B | 12.7 | 17.3 | 7-12 | 65A | 2-1/2B | 67.9 | 76.3 | 410-700 |
| 15A | 1/2B | 16.1 | 21.7 | 12-21 | 80A | 3B | 80.7 | 89.1 | 680-1200 |
| 20A | 3/4B | 21.6 | 27.2 | 22-38 | 100A | 4B | 105.3 | 114.3 | 1200-2100 |
| 25A | 1B | 27.6 | 34 | 38-65 | 125A | 5B | 130.8 | 139.8 | 2100-3600 |
| 32A | 1-1/4B | 35.7 | 42.7 | 70-120 | 150A | 6B | 155.2 | 165.2 | 3300-5700 |
| Area | |||
| cm2 | m2 | in2 | ft2 |
| 1 | 1x10-4 | 0.155 | 1.08x10-6 |
| 1x104 | 1 | 1.55x103 | 10.8 |
| 6.45 | 6.45x10-4 | 1 | 6.94x10-3 |
| 9.30x102 | 9.30x10-2 | 1.44x102 | 1 |
| Others | ||
| Viscosity | 1p=100cP | |
| Weight | 1st=100cst | |
| 1ib=0.454kg | ||
| Temperature | [°F]=（[°C]x5/9)+32 | |
| [°C]=5/9（[°F]-32) | ||
