Engineering
Ohm’s law
Find voltage from current and resistance.
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Engineering
Concrete volume
Estimate the volume of a rectangular slab.
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Square footage
Square footage: use length, width. Review the formula, worked example and calculation steps.
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Tile quantity
Tile quantity: use length, width, tile length. Review the formula, worked example and calculation steps.
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Mulch volume
Mulch volume: use length, width, depth. Review the formula, worked example and calculation steps.
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Gravel volume & mass
Gravel volume & mass: use length, width, depth. Review the formula, worked example and calculation steps.
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Roof area · uniform pitch
Roof area · uniform pitch: use length, width, pitch rise per 12 horizontal units. Review the formula, worked example and calculation steps.
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Stair geometry
Stair geometry: use total vertical rise, maximum desired riser height, tread going. Review the formula, worked example and calculation steps.
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Density
Density: use mass, volume. Review the formula, worked example and calculation steps.
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Mass from density & volume
Mass from density & volume: use density, volume. Review the formula, worked example and calculation steps.
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Weight force
Weight force: use mass, gravitational acceleration. Review the formula, worked example and calculation steps.
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Horsepower from torque
Horsepower from torque: use shaft torque, rotational speed. Review the formula, worked example and calculation steps.
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Electricity use & cost
Electricity use & cost: use appliance power, hours used per day, number of days. Review the formula, worked example and calculation steps.
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Series & parallel resistance
Series & parallel resistance: use resistances in ohms, connection. Review the formula, worked example and calculation steps.
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DC voltage drop
DC voltage drop: use dc current, one-way cable length, conductor cross-sectional area. Review the formula, worked example and calculation steps.
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Molarity from mass
Molarity from mass: use solute mass, supplied molar mass, final solution volume. Review the formula, worked example and calculation steps.
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Tire size geometry
Tire size geometry: use nominal section width, aspect ratio, rim diameter. Review the formula, worked example and calculation steps.
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Amps to watts
Amps to watts: use current, voltage, power factor. Review the formula, worked example and calculation steps.
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Watts to amps
Watts to amps: use real power, voltage, power factor. Review the formula, worked example and calculation steps.
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Volts to watts
Volts to watts: use voltage, current, power factor. Review the formula, worked example and calculation steps.
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Watts to volts
Watts to volts: use real power, current, power factor. Review the formula, worked example and calculation steps.
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Amps to kW
Amps to kW: use current, voltage, power factor. Review the formula, worked example and calculation steps.
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kW to amps
kW to amps: use real power, voltage, power factor. Review the formula, worked example and calculation steps.
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Volts to kW
Volts to kW: use voltage, current, power factor. Review the formula, worked example and calculation steps.
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kW to volts
kW to volts: use real power, current, power factor. Review the formula, worked example and calculation steps.
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Amps to VA
Amps to VA: use current, voltage, circuit. Review the formula, worked example and calculation steps.
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VA to amps
VA to amps: use apparent power, voltage, circuit. Review the formula, worked example and calculation steps.
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VA to watts
VA to watts: use apparent power, power factor. Review the formula, worked example and calculation steps.
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Watts to VA
Watts to VA: use real power, power factor. Review the formula, worked example and calculation steps.
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VA to kW
VA to kW: use apparent power, power factor. Review the formula, worked example and calculation steps.
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kW to VA
kW to VA: use real power, power factor. Review the formula, worked example and calculation steps.
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Amps to KVA
Amps to KVA: use current, voltage, circuit. Review the formula, worked example and calculation steps.
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KVA to amps
KVA to amps: use apparent power, voltage, circuit. Review the formula, worked example and calculation steps.
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KVA to watts
KVA to watts: use apparent power, power factor. Review the formula, worked example and calculation steps.
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Watts to KVA
Watts to KVA: use real power, power factor. Review the formula, worked example and calculation steps.
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KVA to kW
KVA to kW: use apparent power, power factor. Review the formula, worked example and calculation steps.
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kW to KVA
kW to KVA: use real power, power factor. Review the formula, worked example and calculation steps.
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Watts to Joules
Watts to Joules: use watts, duration. Review the formula, worked example and calculation steps.
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Watts to kJ
Watts to kJ: use watts, duration. Review the formula, worked example and calculation steps.
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Watts to Wh
Watts to Wh: use watts, duration. Review the formula, worked example and calculation steps.
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Watts to kWh
Watts to kWh: use watts, duration. Review the formula, worked example and calculation steps.
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kW to Joules
kW to Joules: use kw, duration. Review the formula, worked example and calculation steps.
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kW to kJ
kW to kJ: use kw, duration. Review the formula, worked example and calculation steps.
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kW to Wh
kW to Wh: use kw, duration. Review the formula, worked example and calculation steps.
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kW to kWh
kW to kWh: use kw, duration. Review the formula, worked example and calculation steps.
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Joules to Watts
Joules to Watts: use joules, duration. Review the formula, worked example and calculation steps.
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Joules to kW
Joules to kW: use joules, duration. Review the formula, worked example and calculation steps.
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kJ to Watts
kJ to Watts: use kj, duration. Review the formula, worked example and calculation steps.
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