Keyboard Angle Comfort Calculator

Work out keyboard angle comfort instantly with clear inputs, formula shown and shareable results.

About Keyboard Angle Comfort Calculator

A positively tilted keyboard adds directly to wrist extension, and extension beyond about fifteen degrees raises carpal tunnel pressure sharply. The neutral solution is a flat or slightly negative tilt with the keyboard at or just below seated elbow height, which is why the flip-out feet on most keyboards should stay closed.

Formulas

Net wrist angle

Net extension = observed wrist extension + keyboard tilt

Desk adjustment

Adjustment = seated elbow height - desk height; negative means the desk is too high

Worked example

With the default values below, Keyboard Angle Comfort Calculator returns Net wrist extension of 25.0. Change any input above and every figure here is recalculated in your browser.

Inputs used

Keyboard tiltaccepts -15–25 °: 5 °
Observed wrist extensionaccepts 0–60 °: 20 °
Desk heightaccepts 55–120 cm: 74 cm
Seated elbow heightaccepts 50–110 cm: 70 cm

Results

Net wrist extension: 25.0 °
Recommended keyboard tilt: -15.0 °
Desk height adjustment needed: -4.0 cm
Assessment: Excessive wrist extension — flatten or negatively tilt the keyboard and lower it

Step by step

1Values used
2Net wrist angle
3Desk adjustment
4Net wrist extension= 25.0 °
5Recommended keyboard tilt= -15.0 °
6Desk height adjustment needed= -4.0 cm
7Assessment= Excessive wrist extension — flatten or negatively tilt the keyboard and lower it

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
Preliminary estimate only. Individual display screen equipment assessment should be carried out by a competent assessor.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Preliminary estimate only. Individual display screen equipment assessment should be carried out by a competent assessor.

Frequently Asked Questions

How is the Keyboard Angle Comfort figure worked out?

Net extension = observed wrist extension + keyboard tilt. A positively tilted keyboard adds directly to wrist extension, and extension beyond about fifteen degrees raises carpal tunnel pressure sharply.

Do wrist rests help?

Only as a place to rest between bursts of typing. Resting the wrist on a pad while typing anchors the hand and increases deviation, so it should support the heel of the palm during pauses instead.

What values do I need to enter?

This calculator takes 4 inputs: Keyboard tilt, Observed wrist extension, Desk height, Seated elbow height. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.