Piano-Keyboard.com is an independent reference site about the piano keyboard itself: how its 88 keys are arranged, what every key is called, how the pattern of white and black keys repeats, how keyboards of different sizes compare, and what to look for when buying one. Every article has a small keyboard at the top that you can play with a mouse, a touch screen or your computer keys, with the keys the article talks about lit up.
Why a site about the keyboard
Most questions about the piano start with the instrument in front of you. Which key is middle C? Why are the black keys in groups of two and three? What is the difference between C sharp and D flat? Do I need 88 keys, or will 61 do? Those questions have short, exact answers, but they are often buried inside long lessons or product listings. This site answers them directly, in the order people usually ask them, and lets you check each answer on a keyboard as you read.
What the articles cover
The piano keyboard explained is the starting point: what the keyboard is, why it has 88 keys, and how acoustic pianos, digital pianos and keyboards differ. Piano notes names every key, explains sharps, flats and octave numbers, and includes a table of all 88 keys with their frequencies. The keyboard layout is a map of the keys with a labeled diagram and the landmarks that make any note easy to find. The buying guide explains how keyboard size, key action, touch sensitivity and connections affect what a beginner can learn on an instrument, so you can compare models on your own. Each article answers the most common questions at the end, in short answers you can check against the keyboard at the top of the page.
How the facts are checked
Musical facts on the site follow the standard conventions used by teachers and published music: scientific pitch notation (middle C is C4, the lowest A on a piano is A0), equal temperament with A4 tuned to 440 Hz, and the usual names for sharps and flats. Numbers such as the frequency of each key are calculated rather than copied, and the tables are generated from the same formula, so they agree with each other. Where something varies — for example the exact range of a 61-key keyboard, which depends on the model — the text says so instead of giving one number as if it were universal.
The buying guide is vendor-neutral. It explains features and trade-offs rather than ranking products, it does not list prices, and it contains no affiliate links. Any specific model mentioned was checked against the manufacturer's own specifications.
The sound
The piano sound on these pages is the Salamander Grand Piano, a Yamaha C5 recorded by Alexander Holm and released under the Creative Commons Attribution 3.0 license. Your browser downloads a set of the recordings the first time you play a key (a few megabytes) and keeps them for later visits.
The full piano
This site keeps its keyboard small on purpose, so the articles stay readable. When you want all 88 keys, a chord finder, scales and easy songs with a practice mode, the companion site onlinepianokeyboard.com has them.
Printing
The articles print cleanly from the browser: the keyboard, menus and footer are left out of the printout, and the tables and the labeled keyboard diagram print as they appear on screen.
Contact
Corrections, questions and suggestions are welcome at hello@piano-keyboard.com. If you spot a mistake in a table or a fact, say which page and which row; it will be checked and fixed.