calculate-loan

Section 02

Amortization and balance calculators

How each payment splits into interest and principal, the balance left after any number of payments, balloon loans and annual or weekly schedules.

Calculators in this section
9
Typical formula
Bₖ = P(1+r)ᵏ − M((1+r)ᵏ−1) ÷ r
Photo collage: a neat stack of blank ruled ledger paper and a wooden ruler on a desk, and a close-up of a pencil resting on empty ruled columns.

Start here

Everything in Amortization and balances

Every calculator uses a standard formula and shows it. How the calculators work.