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WEIGHTS & MEASURES
Length Area Volume/Capacity Mass (Weight) Drilling Data/Pump & Hydraulics


APPROXIMATE WEIGHTS & MEASURES
Length Area Volume/Capacity Mass (Weight)


top of page WEIGHTS & MEASURES
Metric Measures

UK and American Measures
top of page Length
1 millimetre (mm)
1 centimetre (cm)
1 metre (m)
1 kilometre (km)
= 10 mm
= 100 cm
= 1000 m

 = 0.0394 in
= 0.3937 in
= 1.0936 yd
= 0.62137 mi
1 inch (in)
1 foot (ft)
1 yard (yd)
1 mile (mi)
1 int nautical mile
= 12 in
= 3 ft
= 1760 yd
= 2025.4 yd
 = 25.4 mm
= 0.03048 m
= 0.9144 m
= 1.60934 km
= 1.852 km
top of page Area
1 sq cm (cm2)
1 sq m (m2)
1 hectare (ha)
1 sq km (km2)
 = 100 mm2
= 10,000 cm2
= 10,000 m2
= 100 ha 		= 0.1550 in2
= 1.1960 yd2
= 2.471 acres
= 0.3861 mile2
1 sq inch (in2)
1 sq yard (yd2)
1 acre
1 sq mile (mile2)
= 9 ft2
= 4840 yd2
= 640 acres
 = 645.16 mm2
= 0.8361 m2
= 4046.86 m2
= 2.590 km2
top of page Volume/Capacity
1 cu cm (cm3)
1 cu decimetre (dm3)
1 cu m (m3)
1 litre (L)
1 hectolitre (hl)
= 1000 cm3
= 1000 dm3
= 1 dm
= 100 L





 = 0.0610 in3
= 1.816 US dry pt
= 1.3080 yd3
= 0.2642 US gal
= 2.8378 US bu
1 cu foot (ft3)
1 cu yard (yd3)
1 US dry pint (dry pt)
1 US bushel (bu)
1 US liquid pint (liq pt)
1 US gallon (gal)
1 UK pint (pt)
1 UK gallon (gal)
1 US fluid ounce (fl oz)
1 US fluid ounce (fl oz)
 = 1728 in3
= 27 ft3
= 33.6 in3
= 64 US dry pt
= 0.8327 UK pt
= 8 US liq pt
= 1.2001 US dry pt
= 1.2001 US gal
= 1.8047 in3
= 1.8047 in3
 = 0.0283 m3
= 0.7646 m3
= 0.5506 L
= 35.239 L
= 0.4732 L
= 3.7854 L
= 0.5683 L
= 4.5461 L
= 29.574 cm3
= 28.413 cm3
top of page Mass (Weight)
1 metric carat
1 gram (g)
1 kilogram (kg)
1 tonne (t)
1 tonne (t)
 = 0.2 g
= 5 met carat
= 1000 g
= 1000 kg

 = 3.0865 gr
= 0.0353 oz
= 2.20462 lb
= 1.1023 short tons
= 0.9842 UK ton
1 grain (gr)
1 ounce (oz)
1 pound (lb)
1 short cwt
1 long cwt
= 437.5 gr
= 16 oz
= 100 lb
= 112 lb
 = 64.799 mg
= 28.3495 mg
= 0.45359 kg
= 45.359 kg
= 50.802 kg
top of page
DRILLING DATA TRADITIONAL UNIT SI UNIT CONVERSION FACTOR EXAMPLE
Bit Size
Weight On Bit
Depth & Footage
Nozzle Size
Nozzle Velocity
DP & DC Size
DP & DC Length
 in
lb
ft
32nds
ft/sec
in
ft
 millimetre
decanewton
metre
millimetre
metre per second
millimetre
metre
 25.4
0.444
0.3048
0.794
0.3048
25.4
0.3048
 7 7/8" = 200 mm
20,000 lb = 8880 daN
1500' = 457 m
10-11-16 = 7.9-8.7-12.7
330 ft/sec = 100 m/s
4 1/2" = 114 mm
6700' = 2042 m
PUMP & HYDRALICS
Liner Size
Rod Diameter
Stroke Length
Pump Output
Pump Pressure
Mud Volume
Annular Velocity
Hydrostatic Head
Pressure Loss
Hydraulic Horsepower
Pressure Loss At Bit
Horsepower At Bit
Mud Weight
Funnel Viscosity
 in
in
in
gal/min
psi
bbl
ft/min
psi
psi/ft
HHP
psi
HHP/sq in
ppg
sec/qt
 millimetre
millimetre
millimetre
litre per minute
kilopascal
cubic metre
metre per minute
kilopascal
kilopascal per metre
kilowatt
kilopascal
kilowatt per sq cm
kilogram per cu m
second per litre
 25.4
25.4
25.4
3.786
6.894
0.159
0.3048
6.894
22.62
0.746
6.894
0.115
119.826

 5 1/2" = 139.7 mm
2 1/4" = 57.2 mm
16" = 406.4 mm
350 GPM = 1325.1 L/min
2470 psi = 17,028 kPa
2550 bbl = 405.5 m3
150 ft/min = 45.7 m/min
3969 psi = 27,363 kPa
0.488 psi/ft = 11.06 kPa/m
600 HHP = 450 kW
1000 psi = 6894 kPa
10 HHP/in3 = 1.15 kW/cm3
9.4 ppg = 1,126.4 kg/m3
as determined in sec/litre
top of page APPROXIMATE WEIGHTS & MEASURES
Metric to Imperial

Imperial to Metric
top of page Length
10 m
100 m
1000 m
10 km
100 km
250 km
500 km
 = 32.8 ft
= 328 ft
= 3280 ft




 = 10.9 yd
= 109 yd
= 0.8 mi
= 6.2 mi
= 62 mi
= 155 mi
= 310 mi
10 ft
100 ft
1000 ft
5280 ft (1 mi)
5 mi
50 mi
500 mi
 = 3 m
= 30.5 m
= 305 m
= 1609 m
= 8 km
= 80 km
= 805 km


= 1.6 km
top of page Area
1 ha
10 ha
100 ha
1000 ha
 = 2.5 acres
= 25 acres
= 247 acres
= 3.75 sections
1 acre
10 acres
160 acres
640 acres


= 1 section
 = 0.4 ha
= 4 ha
= 64.75 ha
= 259 ha
top of page Volume/Capacity
1 m3
10 m3
100 m3
1000 m3
 = 35 ft3
= 353 ft3
= 3532 ft3
= 35,316 ft3
 = 1.3 yd3
= 13 yd3
= 131 yd3
= 1308 yd3
1 ft3
10 ft3
100 ft3
1000 ft3
 = 0.05 m3
= 0.5 m3
= 5 m3
= 48 m3
top of page Mass (Weight)
1 kg
10 kg
100 kg
1000 kg
10,000 kg


= 1 t



 = 2.2 lb
= 22 lb
= 220 lb
= 2205 lb
= 9.8 ton
1 lb
10 lb
100 lb
1000 lb
2000 lb
5 ton
10 ton
 = 0.5 kg
= 4.5 kg
= 45 kg
= 450.5 kg
= 907 kg
= 4500 kg
= 9070 kg



= 0.9 t
= 4.5 t
= 9 t
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