Hand-held calculator for dimensional calculations

A calculator comprising:

• input means for inputting measurements including a dimension power indicative of the order of at least certain measurements;
• storage means for storing at least two inputted measurements;
• function means for performing selected functions on the stored measurements to produce an output measurement, said function means including first checking means for checking the dimension powers of the stored measurements for compatibility with each other for certain functions, said function means further including power function means for generating an output dimension power based on the stored dimension powers and the selected function, said function means further including second checking means for checking the output dimension power to determine whether it is acceptable;
• and
• display means for displaying the output measurement including power display means for displaying selected ones of the output dimension powers, said display means being responsive to said first and second checking means and including means for displaying an error signal when the dimension powers of the stored measurements are incompatible or when the output dimension power is unacceptable.