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Engineers Edge Calculators
Engineering Basic Menu
| Abbreviations may stand for singular or plural usage |
| cm = centimeter
| cu. = cubic
| ft. = foot
| gal. = gallon (US) |
| gr. = gram
| Imp. = Imperial
| in. = inch
| kg. = kilogram |
| km. = kilometer
| l. = liter
| lb. = pound
| m. = meter |
| mi. = mile
| oz. = ounce
| qt. = quart
| std. = standard |
| US = United States
| yd. = yard
|
|
| LENGTH MEASURES |
Common Usage
|
|
Reciprocal Value
|
| 1 ft. = 12 in..
|
| 1 in. = 0.0833 ft.
|
1 yd. = 3 ft.
|
| 1 ft. = 0.3333 yd.
|
1 rod = 5.5000 yd.
|
| 1 yd. = 0.1818 rods
|
1 furlong = 40 rods
|
| 1 rod = 0.0250 furlongs
|
1 mile = 8 furlongs
|
| 1 furlong = 0.1250 mi.
|
1 mi. = 5,280 ft.
|
| 1 ft. = 0.000189 mi.
|
1 mi. = 1,760 yd.
|
| 1 yd. = 0.000568 mi.
|
1 fathom = 6 ft.
|
| 1 ft. = 0.1667 fathom
|
120 fathoms = 1 cable
|
| 1 cable = 0.00833 fathoms
|
1 league = 3 mi.
|
| 1 mi. = 0.3333 leagues
|
1 nautical mi. = 6076.11 ft.
|
| 1 ft. = 0.000165 nautical mi.
|
1 hand = 4 in. (equestrian)
|
| 1 in. = 0.2500 hands
|
| METRIC |
| 1 in. = 2.54 cm.
|
| 1 cm. = 0.3937 in.
|
| 1 ft. = 30.48 cm.
|
| 1 cm. = 0.0328 ft.
|
| 1 m. = 3.2808 ft.
|
| 1 ft. = 0.3048 m.
|
| 1 m. = 39.37 in.
|
| 1 in. = 0.0254 m.
|
| 1 m. = 1.0936 yd.
|
| 1 yd. = 0.9144 m.
|
| 1 rod = 5.029 m.
|
| 1 m. = 0.1988 rod
|
| 1 km = 1000 m.
|
| 1 m. = 0.001 km.
|
| 1 km = 0.621 mi.
|
| 1 mi. = 1.6103 km.
|
| SQUARE MEASURES |
Common Usage
|
| Reciprocal Value
|
| 1 sq. ft. = 144 sq. in.
|
| 1 sq. in = .006944 sq. ft.
|
1 sq. yd. = 9 sq. ft.
|
| 1 sq. ft. = 0.1111 sq. yd.
|
1 sq. rod = 30.25 sq. yd.
|
| 1 sq. yd. = 0.0331 sq. rods
|
1 sq. mi. = 640 acres
|
| 1 acre = 0.0016 sq. mi.
|
| METRIC |
| 1 sq. cm. = 0.1550 sq. in.
|
| 1 sq. in. = 6.452 sq. cm.
|
| 1 sq. ft. = 0.0929 sq. m.
|
| 1 sq. m. = 10.7643 sq. ft.
|
| 1 sq. m. = 1.196 sq. yd.
|
| 1 sq. yd. = 0.8361 sq. m.
|
| 1 hectare = 2.47 acres
|
| 1 acre = 0.4049 hectares
|
| 1 sq. km. = 0.386 sq. mi.
|
| 1 sq. mi. = 2.59 sq. km.
|
| CUBIC & VOLUME MEASURES |
| Common Usage
|
| Reciprocal Value
| 1 cu. ft. = 1,728 cu. in
|
| 1 cu. in. = 0.0005787 cu. ft.
|
| 1 cu. yd. = 27 cu. ft.
|
| 1 cu. ft. = 0.0370 cu. yd.
|
| 1 cord (wood) = 128 cu. ft.
|
| 1 cu. ft. = 0.0078 cord
|
| 1 US std. gal. = 231 cu. in.
|
| 1 cu. in. = 0.00433 US std. gal.
|
| METRIC
|
| 1 cu. in. = 16.39 cu. cm.
|
| 1 cu. cm. = 0.0610 cu. in.
|
| 1 cu. m. = 35.3357 cu. ft.
|
| 1 cu. ft. = 0.0283 cu. m.
|
| 1 cu. m. = 1.308 cu. yd.
|
| 1 cu. yd. = 0.7646 cu. m.
|
| DRY MEASURES
|
| 1 qt. = 2 pints
|
| 1 pint = 0.5000 qt.
|
| 1 peck = 8 qt.
|
| 1 qt. = 0.1250 peck
|
| 1 bushel = 4 pecks
|
| 1 peck = 0.2500 bushels
|
| METRIC
|
| 1 qt. dry = 1.101 l.
|
| 1 l. = 0.908 qt. dry
|
| 1 peck = 8.810 l.
|
| 1 l. = 0.1135 peck
|
| 1 hectoliter = 2.8375 bushels
|
| 1 bushel = 0.3524 hectoliters
|
| LIQUID MEASURES
|
| 1 pint = 2 cup
|
| 1 cup = 0.5000 pints
|
| 1 qt. = 2 pints
|
| 1 pints = 0.5000 qt.
|
| 1 gal.. = 4 qt.
|
| 1 qt. = 0.2500 gal.
|
| 1 gal.. = 8 pints
|
| 1 pint = 0.125000 gal..
|
| 1 barrel = 31.5 gal..
|
| 1 gal.. = 0.0317 barrel
|
| IMPERIAL & METRIC LIQUID MEASURE
|
| 1 US gal.. = 0.833 Imp. gal..
|
| 1 Imp. gal.. = 1.201 US gal..
|
| 1 Imp. gal.. = 4.546 l.
|
| 1 l. = 0.2200 Imp. gal..
|
| 1 l. = 0.264 US gal..
|
| 1 US gal.. = 3.7879 l.
|
| 1 l. = 1.0567 qt. liquid
|
| 1 qt. liquid = 0.9463 l.
|
| 1 gal.. = 3.7854 l.
|
| 1 l. = 0.2642 gal..
| |
| WEIGHT MEASURES |
| Common Usage
|
| Reciprocal Value
| 1 lb. = 16 oz.
|
| 1 oz. = 0.0625 lb.
|
| 1 ton = 2000 lb.
|
| 1 lb. = 0.0005 ton
|
| METRIC |
| 1 oz. = 28.35 gr.
|
| 1 gr. = 0.03527 oz.
|
| 1 kg = 1000 gm
|
| 1 gr. = 0.001 kg.
|
| 1 lb. = 0.4536 kg.
|
| 1 kg. = 2.2046 lb.
|
| 1 metric ton = 0.9842 English ton
|
| 1 English ton = 1.016 metric tons
| |
| Temperature |
| Celsius or Centigrade
|
| Fahrenheit
| 1 degree Celsius (C)
| =
| 5/9 x (F - 32)
|
| (9/5 x C) + 32
| =
| 1 degree Fahrenheit (F) |
|
Air Density Calculation
- Std Air Density = 1.22556 and is defined at 59.0F degrees, 0.0% humidity, and 29.92 inches on the barometer.
-
- Temp C = (Temp-32.0) * 5.0 / 9.0;
- Temp K = Temp C + 273.0;
- Baro mb = Barometer / (29.92 / 1013.0);
- Baro pa = Baro_mb * 100.0;
- Saturation Pressure mb = 6.11 * pow(10,(7.5*Temp C)/(237.7+Temp_c));
- Vapor Pressure mb = Humidity * Saturation Pressure mb / 100.0;
- Temp Virtual K = Temp K / (1.0 - (Vapor Pressure mb/Baro_mb)*(1.-0.622))// D = P/(T*R)
- Air Density = Baro_pa / (Temp Virtual_k*GasConstant)% Std Density = Air Density/Std Air Density*100
Thermal Conductivity Conversions:
1 cal/cm2/cm/sec/°C = 10.63 watts/in - °C
117 BTU/(hr-ft-°F) x (.293 watt-hr/BTU) x (1.8°F/°C) x (ft/12 in.) = 5.14 watts/in - °C
or
117 Btu / (hr-ft-°F) x .04395 watt-hr-°F-ft/(Btu=°C - in) = 5.14 watts/in-°C
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