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| LENGTH | 1in = 25.4mm | 1mm = 0.039in | |
|---|---|---|---|
| 1ft = 30.5cm | 1cm = 0.033ft | ||
| 1yd = 0.914m | 1m = 1.094yd | ||
| 1mi = 1.61km | 1km = 0.62mi | ||
| AREA | 1in2 = 645mm2 | 1mm2 = 0.002in2 | |
| 1in2 = 6.45cm2 | 1cm2 = 0.155in2 | ||
| 1ft2 = 929cm2 | 1cm2 = 0.00107ft2 | ||
| 1yd2 = 0.836m2 | 1m2 = 1.2yd2 | ||
| 1ac2 = 0.405ha2 | 1ha2 = 2.47ac2 | ||
| 1mi2 = 2.59km2 | 1km2 = 0.387mi2 | ||
| PRESSURE |
1psi = 6.9kpa | 1kpa = 0.145psi | |
| 1in of water = 249kpa | 1pa = 0.004in water | ||
| 1ft of water = 0.433psi | 1psi = 2.31ft of water | ||
| 1ft of water = 0.305m of water | 1m of water = 3.28ft of water | ||
| 1kg f/sq cm = 98kpa | 1kpa = 0.01kg f/sq cm | ||
| 1bar = 100kpa | 1kpa = 0.01bar | ||
| 1bar = 10m head | |||
| VELOCITY | 1ft/s = 0.305m/s | 1m/s = 0.039in | |
| 1m/s = 3.6km/h | 1km/h = 0.033ft | ||
| 1mi/h = 1.6093 km/h | 1km/h = 0.6214mi/h | ||
| LIQUID MEASURE |
1 imp gal = 0.00455 m3 | 1 m3 = 220 imp gal | |
| 1 US gal = 0.00378 m3 | 1 m3 = 264.2 US gal | ||
| 1 imp gal = 1.201 US gal | 1 US gal = 0.8327 imp gal | ||
| 1 US bbl = 34.97 imp gal / 42 US gal / 0.159 m3 |
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| VOLUME | 1in3 = 16.38cm3 | 1cm3 = 0.061in3 | |
| 1ft3 = 0.028m3 | 1 m3 = 35.31ft3 | ||
| 1yd3 = 0.7646m3 | 1m3 = 1.307yd3 | ||
| 1m3 of water = 1kl of water | |||
| 1kl = 1000ltrs | |||
| 1t of water = 1m3 | |||
| FORCE | 1lb force = 4.4448n | 1n = 0.2249lb force | |
| 1ft/lb = 1.3557nm | 1nm = 0.737lb force | ||
| FLOW RATE | 1ft3/min = 0.472L/sec | 1L/sec = 2.1189 cubic ft3/min | |
| 1ft3/min = 0.0283m/min | 1m3/min = 35.31 cubic ft3/min | ||
| 1 imp gal/min = 0.076L/sec | 1L/s = 13.2 imp gal/min | ||
| 1 US gal/min = 0.063L/sec | 1L/s = 15.85 US gal/min | ||
| 1 imp gal/min = 0.2728 cubic metre/hr |
1m3/hr = 3.666 imp gal/min | ||
| 1 US gal/min = 0.2271 cubic metre/hr |
1m3/hr = 4.403 US gal/min | ||
| 1L/s = 543.439 barrels/day | 1bbl/day = 0.002 litres/sec | ||
| PRESSURE | CËš = F° minus 32 divide by 1.8 | ||
| FËš = C° multiply by 1.8 and add 32 | |||
| KËš = C° + 273.15 | |||
| POWER | 1 horsepower = 550 ft lbs/sec | 1 kilowatt = 1.341 horsepower | |
| 1 horsepower = 0.7457 kilowatts | |||
| EQUIVALENTS TO 1 ATMOSPHERE |
76 centimetres (760mm) of mercury | 33.899 feet of water | |
| 29.921 inches of mercury | 14.696 psi | ||
| 10.3322 metres of water | 101.325 kilopascal | ||
| 406.782 inches of water | |||
| ELECTRIC MOTOR POLE SPEEDS |
POLES | 50 HZ | 60 HZ |
| 2 | 3000 | 3600 | |
| 4 | 1500 | 1800 | |
| 6 | 1000 | 1200 | |
| 8 | 750 | 900 | |
| 10 | 600 | 720 | |
| 12 | 500 | 600 | |
| HORSEPOWER TO TORQUE |
Horsepower = Torque ft/lb rpm divide by 5252 | ||
| Torque (ft / lb) = Horsepower x 5252 divide by rpm |
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| Torque (in / lb) = Horsepower x 63025 divide by rpm | |||
NPE provides these calculators and guides to assist with general queries and recommends working with experts to ensure suitability.
NPE assumes no responsibility or liability for any errors, omissions or misuse of the contents of this site.
These online tools do not constitute professional advice.
For assistance, contact any of NPE’s Australian branches.
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