Desk Height Calculator: Sitting, Standing, and Seat
Enter your height and get an ergonomic workstation spec: seat height, sitting and standing desk heights, monitor position, and keyboard height.
New to this? The measurement method behind the standing number is in how high a standing desk should be, the order to make the adjustments in is the neutral-posture setup checklist, and if the seat spec here is beyond what your chair can reach, see lumbar support office chairs.
About you
Precision mode — measure elbow and eye heights (optional)
For seated inputs, set your chair with feet supported and measure from the floor. Measure standing elbow height separately in your normal work footwear. These inputs replace the corresponding estimates.
Your side profile
Your workstation spec
Setup checklist
If your desk is fixed-height
How to use the desk height calculator
Enter stature in centimeters or inches for an initial estimate. Set your chair so both feet are supported and the seat edge leaves room behind the knees. Then open precision mode and enter floor-to-elbow and floor-to-eye measurements. The seated inputs should be taken after adjusting the chair; changing seat height later also changes those measurements.
For standing, measure the relaxed elbow separately while wearing your usual work shoes and standing on the mat you actually use. Keep the upper arms close to your torso and the forearms approximately level. Measure the home-row key tops above the desktop as well. A keyboard on a pad has a different height from the same keyboard directly on the surface.
Keyboard height and desktop height are different
Use this measurement relationship: desktop target = floor-to-elbow height minus key-top height above the desktop. This calculator applies it to both sitting and standing. The workstation assessment in the sources compares elbows with the tops of the keys; the desktop underneath is not the contact point for typing.
Worked example: a seated elbow measured at 72 cm and keys 3 cm above the desk produce a 69 cm desktop starting target. A separately measured standing elbow at 110 cm gives a 107 cm standing desktop target with the same keyboard. These are example measurements, not a recommendation for everyone of a given height.
If you use a keyboard tray, apply the target to that input surface and account for its keyboard thickness. The main desktop can remain higher if the tray and available leg clearance support the arrangement. Check the mouse on the same working plane as the keyboard.
How the estimates work, and where they stop
The height-only model uses ErgoRanker heuristics: estimated seat height is 0.26 times stature plus a 2 cm footwear allowance, seated elbow height is 0.40 times stature plus that allowance, and standing elbow height is 0.63 times stature plus the allowance. The default keyboard height is 2.5 cm. These coefficients are model assumptions, not prescribed OSHA settings or a validated fit prediction.
Measured elbow inputs replace the corresponding estimates and already include footwear, so no shoe allowance is added to them. A measured seated eye height replaces the eye estimate. Seat height remains estimated: confirm it against supported feet and knee clearance even when using precision mode. There is no established claim here that an estimate is accurate within a few centimeters for every user.
NIOSH describes variation in body dimensions and the importance of matching equipment to users. That is why personal measurements take priority over stature alone. The illustrative ranges on the cards show room for adjustment; they are not confidence intervals or clinical assessments. For a separate reference table, see HomeDeskGuide's desk-height chart and measurement reference.
Check finished furniture dimensions before buying
Compare your desktop targets with the finished work-surface range. A specification for bare columns excludes the top; an assembled-desk figure may already include it. Top thickness, approved casters and other height-changing accessories need to be accounted for exactly once. A one-inch top on a 24-inch-minimum frame produces a 25-inch minimum before other changes.
Minimum travel often determines whether a seated position is possible, while maximum travel determines whether the standing target is reachable. Capacity, motor count and warranty answer different buying questions. A structural certification or a wide adjustment range does not guarantee personal fit.
OSHA's purchasing guide describes adjustment capabilities for furniture and positioning the keyboard near elbow height. It does not prescribe one universal desk setting. Compare candidates in standing desks under $500 and standing desks under $1,000 after establishing your targets.
If a fixed desk misses the target
For a desk that is too high, raising the chair may bring your arms to keyboard level, but recheck support under your feet and room for your thighs. A stable footrest or an adjustable input tray may help. For a surface that is too low, consider manufacturer-approved stable risers or furniture with suitable travel. Do not sacrifice leg clearance to make a number match.
The fixed-desk panel estimates the difference from your target. Its suggested change is a starting adjustment to verify physically, especially if a chair cylinder cannot reach the proposed height. Use the neutral-posture setup checklist to check the complete arrangement rather than treating one height as the whole solution.
Set the monitor after the input surface
OSHA's monitor guidance places the top at or below eye level and gives a preferred viewing distance of 20–40 inches (50–100 cm), adjusted for readable text without leaning. The center is normally below the horizontal eye line. The calculator's diagonal-based distance and tilt are starting suggestions within a narrower model range, not a requirement to hold the screen at that precise number.
Enlarge text if necessary and check for reflections. Multifocal lenses can require a lower screen position. For prolonged laptop use, separate input devices let you adjust the screen and keyboard independently. Recheck the screen in both sitting and standing positions.
Check the setup during ordinary work
A saved preset should be revisited when equipment or footwear changes. Observe how you approach the keyboard and read the screen during a normal work period. The clues below suggest adjustments to inspect; they do not identify the medical cause of a symptom.
| What you notice | First setup check |
|---|---|
| Shoulders raised while typing | Input height and forward reach |
| Wrists bent upward | Keyboard height and slope |
| Chin lifted to read | Monitor height and lens position |
| Leaning toward the screen | Text size, viewing distance and chair approach |
| Feet unsupported | Chair height, footrest and thigh clearance |
Change position and take movement breaks; a height setting is not a reason to remain still all day. A desk and chair cannot diagnose or treat back pain. Persistent or worsening symptoms need appropriate clinical advice. For a buying comparison, see office chairs for back pain.
Frequently asked questions
How accurate is a desk height calculator?
A height-based result is a starting estimate. Body proportions, footwear, chair compression and keyboard thickness change the setting. Replace estimates with measured elbow and eye heights, then check the actual workstation.
Should sitting and standing desk heights use the same measurement?
Measure each posture separately. In both cases, subtract the home-row key height above the desktop from your relaxed floor-to-elbow height. Save each preset after checking shoulders and wrists.
Can the calculator choose a chair for back pain?
It can help compare seat and desk dimensions, but it cannot diagnose pain or guarantee that a chair will be comfortable. Compare the chair's adjustment range with your measurements and seek clinical advice for persistent or worsening symptoms.