Unit Conversions

Dimensions Length Flow Volume Pressure Power

Length Foot, meter, mile, kilometer, light year –1 meter = 3.28 feet –So 1 foot is about one third of a meter –1 mile = 1.6 kilometers 1 light year = × 10^ 12 miles 5,878,499,810,000 miles

Volume Gallons, liters, cubic feet 1 gallon = 3.78 liters 1 cubic ft = 7.48 gallons = 28.3 liters Think about it!

Flow Gallons per minute (GPM) Cubic feet per Second (cfs) Liters / second (l/s) 1 cfs = GPM = 28.3 l/s 1 GPM =.0022 cfs =.063 l/s If a 5 gallon bucket fills in 6.5 seconds how many gallons per minute is this?

Pressure Pounds per square inch or psi, Feet of head 1 psi = 2.31 ft So if head of 140 ft, then 140/2.31 = 60.6 psi How many feet of head can a pipe rated for 100 psi handle?

Temperature °F = 9/5 * °C + 32 °C = (°F – 32) * 5/9 K = °C How many °F is 0 °C?

Others 600 kWh = 1 barrel of oil

Power Watts, Kilowatts 1 kilowatt = 1000 watts The Jacob Wind Turbine on Beech Mountain produces 20,000 watts, how many Kilowatts is this? The HV 1200 produces 1200 watts, how many KW is this?

Power If the HV1200 makes max power, How much energy can be stored, used to heat water, or used in some way over 1 week’s time? What percentage of the average household’s energy use is this amount of energy created by the microhydro system?

Converting Values Either apply known conversion Or do it unit by unit with factoring. Examples: On Chalk Board