Measure your Pupillary Distance accurately at home - 100% Free!
Clinically accurate printable ruler with detailed instructions
đ Download PDF Ruler (Free) đ¨ī¸ View & PrintPupillary Distance (PD) is the distance between the centers of your pupils, measured in millimeters. It's essential for properly aligning your eyeglass lenses.
Correct PD ensures your eyes look through the optimal part of your lenses, preventing eye strain, headaches, and blurry vision.
Adults: 54-74mm
Most common: 60-65mm
Kids: 43-58mm
Download & print our accurate PD measurement ruler (most accurate!)
Download PDFConvert your prescription between plus and minus cylinder format instantly.
Convert NowSwitching from glasses to contacts? Find your correct contact lens power.
CalculateKnow your contact lens Rx? Find the equivalent glasses power.
CalculateFind the exact reading glasses strength you need from your prescription ADD value.
CalculateEnter your Rx numbers and understand exactly what they mean in plain English.
Explain My RxConvert your full prescription to a simplified spherical power for contact lens fitting.
CalculateReduce digital eye strain. Find your perfect computer/screen glasses power.
CalculateWill my lenses be thick? Find out based on your prescription, frame size and lens material.
CalculateConvert your distance PD to near PD for reading glasses. Works for single and dual PD.
CalculateConfused by progressive lenses? See exactly what distances each zone covers for your ADD.
Explore ZonesFind the best lens material (1.50 to 1.74 high-index) for thin, light glasses based on your Rx.
Get RecommendationLearn everything about PD measurement, prescriptions and eyewear tips.
Read ArticlesAll tools on PDCalculator.net are for educational and informational purposes only. They do not replace professional eye care advice, diagnosis, or treatment. Always consult a licensed optometrist or ophthalmologist before purchasing eyewear or making any changes to your vision correction. Results are based on standard optical formulas and are provided as a general guide only.