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Engineering calculators
Resistors
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PPM / % calculator
This calculator converts from ppm ( parts per million ) to percentage, and from percentage to ppm. This is particulary useful when working out the total error contributed by a resistor.
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Maximum resistor power for given heatsink
This calculator enables the user to calculate the maximum power that a resistor can dissipate with a given heatsink size and ambient temperature.
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Heatsink size calculator
This calculator calculates the heatsink size for given resistor power and ambient conditions.
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Inrush current limiters
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Inrush current limiter energy calculator
When designing a circuit that uses an inrush current limiter one of most important parameters is the energy rating of the circuit. This calculator helps determine this parameter.
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