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How to measure your IPD

Short answer: IPD is the distance between the centers of your pupils, measured in millimetres. For the most accurate result, have an optometrist measure it. For a useful home estimate, use a mirror, a millimetre ruler and the steps below. Last checked October 11, 2026; headset menus and hardware vary by model.

What IPD means

Informational: IPD (interpupillary distance) is the distance between your pupils. A headset’s lens spacing should line up with your IPD as closely as possible for the clearest view, according to Meta’s Quest guidance. IPD is not the same thing as eye relief (how close the lenses sit to your eyes), facial fit, or the distance between the outside edges of your eyes.

Measure IPD at home

Actionable steps: This is an estimate, not a substitute for an optometrist’s measurement. Use a straight millimetre ruler, a well-lit mirror and (ideally) a friend. Remove the headset and glasses so their frames do not hide the pupil centers; do not measure with a phone camera or an app and assume its result is accurate.

  1. Stand upright in front of a mirror in good light. Keep your head level and look at your own eyes in the mirror—not at the ruler. Hold the ruler horizontally above your eyes. Ask a friend to read it if possible; it is easier to keep your head and the ruler still.
  2. Close one eye. Align the ruler’s zero end (not an arbitrary edge) with the centre of your open pupil. If the ruler has a worn or offset end, start from a clear numbered mark and subtract that starting value from the second reading.
  3. Without moving the ruler or changing your gaze, open the other eye. Place a finger over the ruler at the centre of that pupil and read the millimetre mark under your finger. The difference between the two marks is your binocular IPD.
  4. Record the number in millimetres. Repeat from the start at least twice, keeping the ruler level and your gaze straight ahead. If the readings vary materially, or you cannot see both pupil centers, stop relying on the home estimate and ask an optometrist.

Keep the ruler away from your eyes and do not press it against your face. Remove anything that blocks the pupil centers, such as a headset. If you wear glasses, measure with them off unless a clinician tells you otherwise.

Choose the headset setting

Actionable steps: Start with the headset’s own adjustment method and then fine-tune for a clear, comfortable image. Labels and controls vary by model and software version.

  1. Put the headset on evenly and adjust the strap so it sits comfortably. Look at small, sharp, high-contrast text or an object in the center of the view.
  2. Identify the control: some headsets move lenses mechanically, while others expose an in-software value. Set the closest available value to your measured IPD; do not force lenses or a dial beyond its stops.
  3. Make small adjustments while looking straight ahead. Stop when text and edges look clearest without eye strain. If one eye remains unclear, remove and reseat the headset, check its angle and fit, then try again. A blurry image is not proof that your IPD measurement is wrong.

For Meta Quest, Meta says Quest headsets best accommodate IPDs from 56–70 mm. Its suggested Quest lens-spacing positions are: 61 mm or smaller → position 1 (about 58 mm); 61–66 mm → position 2 (about 63 mm); and 66 mm or larger → position 3 (about 68 mm). These ranges meet at the boundary in Meta’s table; try the adjacent setting if the image is clearer and more comfortable there. This is model-specific guidance, not a universal setting for every headset.

Headset compatibility notes

Adjustment range is hardware-specific. For example, Valve lists a physical 58–70 mm IPD adjustment range for Valve Index, and its fit guide says to use the slider and read the current IPD in the headset display. If your measured IPD is outside a headset’s supported range, you may not be able to align both lens sweet spots; check that model’s official manual or support page before buying or troubleshooting. Do not treat a home estimate as a prescription or as proof that a headset is suitable for a child.

If the view is still blurry after a careful measurement, first check that the headset is level, the lenses are clean according to the manufacturer’s instructions, and the fit is stable. Persistent double vision, headaches, or eye discomfort is a reason to stop using the headset and ask an optometrist or eye-care professional for advice—not to keep tightening the strap or forcing the adjustment.

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