Sit with the feet supported and shoulders relaxed, then measure the elbow height from the floor.
Free private calculator
Keyboard and mouse position calculator
Estimate a work-surface height from seated elbow height and input-device thickness so shoulders can relax and wrists can stay closer to neutral.
No accountInputs stay in this tab
Input-surface starting height67
Centimeters from the floor; refine until shoulders relax and wrists stay comfortable.
Direct answer
What this tool calculates—and what it does not.
Estimate a work-surface height from seated elbow height and input-device thickness so shoulders can relax and wrists can stay closer to neutral.
Transparent methodology
How the calculation works
The calculator subtracts keyboard or tray thickness from measured seated elbow height. This keeps the top of the keys near the forearm line instead of treating the desk’s published height as the ergonomic target.
Formula or decision ruleInput-surface height = seated elbow height from floor − keyboard or tray thickness.
Inputs explained
Measure from the supporting surface to the top of the key area or pointing-device surface.
Practical use
When this tool is useful
- Setting a keyboard tray or adjustable desk.
- Diagnosing raised shoulders at a fixed desk.
- Bringing keyboard and mouse onto the same close working plane.
A reliable way to use it
- 01Use a current baseline
Enter values from the same person, household, account, or operating period. Mixing periods makes a precise-looking result less useful.
- 02Run more than one scenario
Change one uncertain input at a time. A conservative and an expected case reveal which assumption matters most.
- 03Read the boundaries
Review the method and limitations on this page before turning the estimate into a decision.
- 04Save the next action
Record the input, result, source, and review date so the estimate can be checked when circumstances change.
Interpretation
How to read the result
- Keep elbows near the body and shoulders relaxed.
- Bring the mouse close enough that the upper arm does not repeatedly reach.
- Use keyboard tilt, chair, tray, and foot support together rather than forcing one number.
Boundaries
What the result cannot tell you
- The estimate depends on a correct seated-elbow measurement.
- It does not account for every input device, task, mobility need, or pain condition.
- Neutral does not mean motionless; position changes remain important.
Common questions
Common questions about Keyboard and mouse position calculator
Should the keyboard lie flat?
A flat or slightly negative tilt often helps keep wrists closer to neutral, but the best setup depends on the whole forearm position and individual needs.
Why should the mouse be close to the keyboard?
A distant pointer increases repeated reaching and shoulder load. Keep it on the same level and within an easy forearm reach.
What if a fixed desk is too high?
Raise the chair only if the feet remain supported; otherwise add a stable footrest and consider a keyboard tray or alternate work surface.
How accurate is the keyboard and mouse position calculator?
It is a transparent planning estimate, not a measurement or prediction. Its usefulness depends on the inputs and assumptions shown on this page. Compare the result with actual records before making a material decision.
Are my entries stored or sent anywhere?
No. The calculation or check-in runs in the browser tab and does not require an account. Avoid entering names, account numbers, or other identifying information.
Evidence and review notes
Sources behind the method
These references support the method, boundary, or safety context. They do not turn this planning tool into individualized professional advice.
Optional next step
Follow app updates When reminders would help the habit stick
ErgoMate is the optional iOS companion for turning setup guidance and movement prompts into a repeatable workday routine.