Medical Measurement Conversions

Drug dosing, lab values and patient weight — the everyday conversions clinicians can't get wrong.

6 min read 3 sections Updated May 11, 2026
healthmedicalindustry
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Patient weight

lb ↔ kg

Pound (lb)

Kilogram (kg)

Unit1 lb equals
Milligram (mg)453,592
Gram (g)453.592
Kilogram (kg)0.453592
Metric Ton (t)0.000453592
Ounce (oz)16
Pound (lb)1
Stone (st)0.0714286
US Ton (ton)0.0005

Common lab conversions

AnalyteUS unitsSI unitsFactor
Glucosemg/dLmmol/L÷ 18.0156
Cholesterolmg/dLmmol/L÷ 38.67
Creatininemg/dLµmol/L× 88.4
Hemoglobing/dLg/L× 10

Body temperature

°F°CRange
97.036.1Lower normal
98.637.0Reference
100.438.0Fever threshold
104.040.0High fever

Always reconcile units at handoff

Most reported medication errors involve unit conversion (mg vs mcg, mL vs drops). Read back doses with both number and unit.

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