reikning

Reikning is a term used in Icelandic and related Nordic languages with multiple but related meanings. It derives from the verb reikna, meaning to count or reckon, and the noun form can refer to calculation, an account, or a bill. In mathematics and education, reikningur denotes arithmetic and numerical calculation, the process of adding, subtracting, multiplying, and dividing.

In everyday commerce and professional settings, reikningur most commonly means an invoice or bill that a seller issues to a buyer. A reikningur typically lists the goods or services provided, their prices, any applicable taxes, the total amount due, and payment terms including a due date. In bookkeeping or accounting contexts, the term may also be used to refer to a financial statement or ledger entry that records a transaction.

The concept of reikning is central to financial transactions, taxation, and budgeting. Digital tools have digitalized reikning creation, storage, and processing, with electronic invoicing and online bookkeeping widely used in businesses and public administration. Although usage varies by country and language, the core idea is the documentation and calculation of money owed or accounted for.