Visitors to parks and protected areas impact at many levels: political, economic, social and ecological. To ensure effective park management for increasing visitor numbers, good quality global data on visitor use is necessary. This manual describes terms, approaches and techniques for gathering information about public use of parks and protected areas. It covers a mixture of options ranging from direct measurements with automatic counters to indirect measurements based on simple mathematical calculations, providing a kit for producing the most accurate and sustainable enumeration of public use of protected areas under existing circumstances.