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Change the answer mode for this tool by selecting start temperature (T_{0}), end temperature (T_{1}), temperature coefficient of resistance (α_{R}), start resistance (R_{0}) or end resistance (R_{1}) as the parameter to calculate instead

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## User Guide

This tool will calculate any parameter from the formula R₁=R₀(1+α(T₁–T₀)) for determining how much electrical resistance changes with temperature, which includes the start temperature, end temperature, temperature coefficient of resistance (TCR), start resistance and end resistance.

### Formulas

The formulas used by this temperature, TCR and resistance change calculator to determine each individual parameter are as follows:

T_{0} = T_{1} – (R_{1} / R_{0} – 1) / α_{R}

T_{1} = T_{0} + (R_{1} / R_{0} – 1) / α_{R}

α_{R} = (R_{1} / R_{0} – 1) / (T_{1} – T_{0})

R_{0} = R_{1} / (1 + α_{R} · (T_{1} – T_{0}))

R_{1} = R_{0} · (1 + α_{R} · (T_{1} – T_{0}))

#### Symbols

- T
_{0}= Start temperature - T
_{1}= End temperature - α
_{R}= Temperature coefficient of resistance (TCR) - R
_{0}= Start resistance - R
_{1}= End resistance

### Start Temperature (T_{0})

This is the temperature of the object before the temperature is increased.

### End Temperature (T_{1})

This is the temperature of the object after the temperature has been increased

### Temperature Coefficient of Resistance (TCR, α_{R})

This is a fixed value which is used to determine how much a change in temperature will affect the electrical resistance of a particular material. The coefficient defines the fractional change in resistance of a material per unit change in its temperature.

### Start Resistance (R_{0})

This is the electrical resistance of the material when it is at the start temperature T_{0} .

### End Resistance (R_{1})

This is the electrical resistance of the material following a change temperature from T_{0} to T_{1} .