A method for calculating hematocrit of a whole blood sample, the method comprising: contacting the sample with a sensor inserted into a meter, the sensor comprising a sample chamber comprising a first electrode, a second electrode, and a third electrode, wherein the electrodes are arranged such that the sample contacts the first electrode before contacting the third electrode, wherein the meter comprises a memory, a display and a processor for executing instructions stored in the memory, the memory comprising instructions for: determining fill-time by measuring time elapsed between detecting a signal between the first electrode and the second electrode and another signal between the first electrode and the third electrode, wherein the fill-time is related to hematocrit of the sample through a viscosity of the sample and a reference temperature; measuring a first signal at the second electrode after the sample chamber is substantially filled with the sample, wherein the first signal is related to hematocrit of the sample; measuring a second signal at the third electrode, wherein the second signal is related to hematocrit of the sample; deriving, by using the processor executing instructions stored in the memory, a first hematocrit value, a second hematocrit value and a third hematocrit value using the fill-time, the first signal, and the second signal, respectively; comparing the first, second, and third hematocrit values to determine whether one of the values is an outlier; and calculating a single hematocrit value based on at least two of the first, second, and third hematocrit values that are in agreement. contacting the sample with a sensor inserted into a meter, the sensor comprising a sample chamber comprising a first electrode, a second electrode, and a third electrode, wherein the electrodes are arranged such that the sample contacts the first electrode before contacting the third electrode, wherein the meter comprises a memory, a display and a processor for executing instructions stored in the memory, the memory comprising instructions for: determining fill-time by measuring time elapsed between detecting a signal between the first electrode and the second electrode and another signal between the first electrode and the third electrode, wherein the fill-time is related to hematocrit of the sample through a viscosity of the sample and a reference temperature; measuring a first signal at the second electrode after the sample chamber is substantially filled with the sample, wherein the first signal is related to hematocrit of the sample; measuring a second signal at the third electrode, wherein the second signal is related to hematocrit of the sample; deriving, by using the processor executing instructions stored in the memory, a first hematocrit value, a second hematocrit value and a third hematocrit value using the fill-time, the first signal, and the second signal, respectively; comparing the first, second, and third hematocrit values to determine whether one of the values is an outlier; and calculating a single hematocrit value based on at least two of the first, second, and third hematocrit values that are in agreement. determining fill-time by measuring time elapsed between detecting a signal between the first electrode and the second electrode and another signal between the first electrode and the third electrode, wherein the fill-time is related to hematocrit of the sample through a viscosity of the sample and a reference temperature; measuring a first signal at the second electrode after the sample chamber is substantially filled with the sample, wherein the first signal is related to hematocrit of the sample; measuring a second signal at the third electrode, wherein the second signal is related to hematocrit of the sample; deriving, by using the processor executing instructions stored in the memory, a first hematocrit value, a second hematocrit value and a third hematocrit value using the fill-time, the first signal, and the second signal, respectively; comparing the first, second, and third hematocrit values to determine whether one of the values is an outlier; and calculating a single hematocrit value based on at least two of the first, second, and third hematocrit values that are in agreement.