An electronic calculator includes first and second display sections, a conversion rate storage unit configured to store a plurality of conversion rates, a conversion rate display unit configured to call the plurality of conversion rates in sequence from the conversion rate storage unit and display the conversion rates on the second display section, a numerical value display unit configured to display a numerical value on the first display section according to a user operation, and a numerical value conversion unit configured to convert the numerical value displayed on the first display section by the numerical value display unit so as to correspond to a conversion transition designated by a user operation, based on a conversion rate displayed on the second display section by the conversion rate display unit.