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GIGA has one of the largest selections of free online calculators, neatly organized into categories for your convenience. You can also use our search feature to quickly locate a particular calculator.

Our online calculators are useful in solving various practical problems as well as problems given to students in courses teached at schools, colleges, and universities. They are unique in being very easy to use, with plenty of inline help to guide you towards proper use, as well as detailed supporting information with explanations, formulas, and charts.