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<div class="HwContainer HwElement" id="HwContainer"><a class="HwMainSkipNavigation" href="#HwContentTitle"><span class="HwAccessibilityText">Skip Navigation</span></a><div class="HwBlock" id="HwMain" role="main"><div class="HwRow"><div class="HwColumn" id="HwColumnSidebar1"><div class="HwCustom" id="HwCustomSidebar"> </div></div><div class="HwColumn" id="HwColumnContent"><div id="HwContentTop"> </div><div class="HwTypeFocus HwContentWrapper HwElement" role="article" id="HwContentWrapper"><div class="HwCustom" id="HwCustomContentTop"> </div><div class="HwContentHeader"><p><a name="top" id="Hwtop"><span class="HwAccessibilityText">Top of the page</span></a> </p></div><div class="HwContentTitle"><h1 id="HwContentTitle" tabindex="-1">Lab Test Results: Units of Measurement</h1></div><div class="HwContentTopNavigation"> </div><div class="HwContent"><div class="HwNavigationSection HwSectionSpecialSection" id="sec-zd1440-sec"><h2 class="HwSectionTitle" fingerprint="b4cb0a40" fingerprint-exact="e7c3d1bb">Overview</h2> <p fingerprint="9ce718f7" fingerprint-exact="4acf1a01">Lab test results usually contain some type of unit of measurement. The units provide a way to report results so that they can be compared. Usually, but not always, the same test is reported in the same units no matter which lab did the test. Units of measurement that may be used for lab test results include:</p> <div class="HwOptionalAll"> <ul fingerprint="05f92fe0" fingerprint-exact="7564f864"> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="aa80601" data-hw-section="aa80601-sec" rel="Definition" hw:document-type="Definition" hw:document-href="aa80601" data-hwid="aa80601" hw:section-href="aa80601-sec" href="?id=aa80601#aa80601-sec"><span class="HwLinkText">Femtoliters</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="aa73732" data-hw-section="aa73732-sec" rel="Definition" hw:document-type="Definition" hw:document-href="aa73732" data-hwid="aa73732" hw:section-href="aa73732-sec" href="?id=aa73732#aa73732-sec"><span class="HwLinkText">Grams (g)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="aa73747" data-hw-section="aa73747-sec" rel="Definition" hw:document-type="Definition" hw:document-href="aa73747" data-hwid="aa73747" hw:section-href="aa73747-sec" href="?id=aa73747#aa73747-sec"><span class="HwLinkText">Grams per deciliter (g/dL)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="aa73754" data-hw-section="aa73754-sec" rel="Definition" hw:document-type="Definition" hw:document-href="aa73754" data-hwid="aa73754" hw:section-href="aa73754-sec" href="?id=aa73754#aa73754-sec"><span class="HwLinkText">Grams per liter (g/L)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="aa74530" data-hw-section="aa74530-sec" rel="Definition" hw:document-type="Definition" hw:document-href="aa74530" data-hwid="aa74530" hw:section-href="aa74530-sec" href="?id=aa74530#aa74530-sec"><span class="HwLinkText">International units per liter (IU/L)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="aa74537" data-hw-section="aa74537-sec" rel="Definition" hw:document-type="Definition" hw:document-href="aa74537" data-hwid="aa74537" hw:section-href="aa74537-sec" href="?id=aa74537#aa74537-sec"><span class="HwLinkText">International units per milliliter (IU/mL)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stm159472" data-hw-section="stm159472-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stm159472" data-hwid="stm159472" hw:section-href="stm159472-sec" href="?id=stm159472#stm159472-sec"><span class="HwLinkText">Micrograms (mcg)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stm159436" data-hw-section="stm159436-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stm159436" data-hwid="stm159436" hw:section-href="stm159436-sec" href="?id=stm159436#stm159436-sec"><span class="HwLinkText">Micrograms per deciliter (mcg/dL)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stm159443" data-hw-section="stm159443-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stm159443" data-hwid="stm159443" hw:section-href="stm159443-sec" href="?id=stm159443#stm159443-sec"><span class="HwLinkText">Micrograms per liter (mcg/L)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="tw12860" data-hw-section="tw12860-sec" rel="Definition" hw:document-type="Definition" hw:document-href="tw12860" data-hwid="tw12860" hw:section-href="tw12860-sec" href="?id=tw12860#tw12860-sec"><span class="HwLinkText">Microkatals per liter (mckat/L)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stm159450" data-hw-section="stm159450-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stm159450" data-hwid="stm159450" hw:section-href="stm159450-sec" href="?id=stm159450#stm159450-sec"><span class="HwLinkText">Microliters (mcL)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stm159454" data-hw-section="stm159454-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stm159454" data-hwid="stm159454" hw:section-href="stm159454-sec" href="?id=stm159454#stm159454-sec"><span class="HwLinkText">Micromoles per liter (mcmol/L)</span></a>. </li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stm159468" data-hw-section="stm159468-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stm159468" data-hwid="stm159468" hw:section-href="stm159468-sec" href="?id=stm159468#stm159468-sec"><span class="HwLinkText">Milliequivalents (mEq)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stm159429" data-hw-section="stm159429-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stm159429" data-hwid="stm159429" hw:section-href="stm159429-sec" href="?id=stm159429#stm159429-sec"><span class="HwLinkText">Milliequivalents per liter (mEq/L)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stm159515" data-hw-section="stm159515-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stm159515" data-hwid="stm159515" hw:section-href="stm159515-sec" href="?id=stm159515#stm159515-sec"><span class="HwLinkText">Milligrams (mg)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stm159483" data-hw-section="stm159483-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stm159483" data-hwid="stm159483" hw:section-href="stm159483-sec" href="?id=stm159483#stm159483-sec"><span class="HwLinkText">Milligrams per deciliter (mg/dL)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stm159541" data-hw-section="stm159541-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stm159541" data-hwid="stm159541" hw:section-href="stm159541-sec" href="?id=stm159541#stm159541-sec"><span class="HwLinkText">Milligrams per liter (mg/L)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stm159461" data-hw-section="stm159461-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stm159461" data-hwid="stm159461" hw:section-href="stm159461-sec" href="?id=stm159461#stm159461-sec"><span class="HwLinkText">Milli-international units per liter (mIU/L)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stm159490" data-hw-section="stm159490-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stm159490" data-hwid="stm159490" hw:section-href="stm159490-sec" href="?id=stm159490#stm159490-sec"><span class="HwLinkText">Milliliters (mL)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stm159495" data-hw-section="stm159495-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stm159495" data-hwid="stm159495" hw:section-href="stm159495-sec" href="?id=stm159495#stm159495-sec"><span class="HwLinkText">Millimeters (mm)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stm159567" data-hw-section="stm159567-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stm159567" data-hwid="stm159567" hw:section-href="stm159567-sec" href="?id=stm159567#stm159567-sec"><span class="HwLinkText">Millimeters of mercury (mm Hg)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stm159499" data-hw-section="stm159499-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stm159499" data-hwid="stm159499" hw:section-href="stm159499-sec" href="?id=stm159499#stm159499-sec"><span class="HwLinkText">Millimoles (mmol)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stm159571" data-hw-section="stm159571-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stm159571" data-hwid="stm159571" hw:section-href="stm159571-sec" href="?id=stm159571#stm159571-sec"><span class="HwLinkText">Millimoles per liter (mmol/L)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stm159503" data-hw-section="stm159503-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stm159503" data-hwid="stm159503" hw:section-href="stm159503-sec" href="?id=stm159503#stm159503-sec"><span class="HwLinkText">Milliosmoles per kilogram of water (mOsm/kg water)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="ux1147" data-hw-section="ux1147-sec" rel="Definition" hw:document-type="Definition" hw:document-href="ux1147" data-hwid="ux1147" hw:section-href="ux1147-sec" href="?id=ux1147#ux1147-sec"><span class="HwLinkText">Milliunits per gram (mU/g)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="tv8567" data-hw-section="tv8567-sec" rel="Definition" hw:document-type="Definition" hw:document-href="tv8567" data-hwid="tv8567" hw:section-href="tv8567-sec" href="?id=tv8567#tv8567-sec"><span class="HwLinkText">Milliunits per liter (mU/L)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stn166036" data-hw-section="stn166036-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stn166036" data-hwid="stn166036" hw:section-href="stn166036-sec" href="?id=stn166036#stn166036-sec"><span class="HwLinkText">Nanograms per deciliter (ng/dL)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stn166143" data-hw-section="stn166143-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stn166143" data-hwid="stn166143" hw:section-href="stn166143-sec" href="?id=stn166143#stn166143-sec"><span class="HwLinkText">Nanograms per liter (ng/L)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stn166222" data-hw-section="stn166222-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stn166222" data-hwid="stn166222" hw:section-href="stn166222-sec" href="?id=stn166222#stn166222-sec"><span class="HwLinkText">Nanograms per milliliter (ng/mL)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stn166214" data-hw-section="stn166214-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stn166214" data-hwid="stn166214" hw:section-href="stn166214-sec" href="?id=stn166214#stn166214-sec"><span class="HwLinkText">Nanograms per milliliter per hour (ng/mL/hr)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stn166210" data-hw-section="stn166210-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stn166210" data-hwid="stn166210" hw:section-href="stn166210-sec" href="?id=stn166210#stn166210-sec"><span class="HwLinkText">Nanomoles (nmol)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stn166203" data-hw-section="stn166203-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stn166203" data-hwid="stn166203" hw:section-href="stn166203-sec" href="?id=stn166203#stn166203-sec"><span class="HwLinkText">Nanomoles per liter (nmol/L)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stp1648" data-hw-section="stp1648-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stp1648" data-hwid="stp1648" hw:section-href="stp1648-sec" href="?id=stp1648#stp1648-sec"><span class="HwLinkText">Picograms (pg)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stp1701" data-hw-section="stp1701-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stp1701" data-hwid="stp1701" hw:section-href="stp1701-sec" href="?id=stp1701#stp1701-sec"><span class="HwLinkText">Picograms per milliliter (pg/mL)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stp1694" data-hw-section="stp1694-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stp1694" data-hwid="stp1694" hw:section-href="stp1694-sec" href="?id=stp1694#stp1694-sec"><span class="HwLinkText">Picomoles per liter (pmol/L)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="zd1603" data-hw-section="zd1603-sec" rel="Definition" hw:document-type="Definition" hw:document-href="zd1603" data-hwid="zd1603" hw:section-href="zd1603-sec" href="?id=zd1603#zd1603-sec"><span class="HwLinkText">Titers</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stu3135" data-hw-section="stu3135-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stu3135" data-hwid="stu3135" hw:section-href="stu3135-sec" href="?id=stu3135#stu3135-sec"><span class="HwLinkText">Units per liter (U/L)</span></a>.</li> <li class="HwOptionalAny"> <a class="HwLinkDefinition" data-hw-type="Definition" data-hw-document-href="stu3128" data-hw-section="stu3128-sec" rel="Definition" hw:document-type="Definition" hw:document-href="stu3128" data-hwid="stu3128" hw:section-href="stu3128-sec" href="?id=stu3128#stu3128-sec"><span class="HwLinkText">Units per milliliter (U/mL)</span></a>.</li> </ul> </div> </div><div class="HwNavigationSection HwSectionRelatedInformation" id="sec-zd1440-RelInfo"><h2 class="HwSectionTitle" fingerprint="d5f858e0" fingerprint-exact="c0ffe04b">Related Information</h2><ul fingerprint="c24d3655" fingerprint-exact="7e230727"><li class="HwOptionalAny"><a data-hw-type="Special" data-hw-document-href="zp3409" data-hw-section="zp3410" hw:document-type="Special" hw:document-href="zp3409" data-hwid="zp3409" hw:section-href="zp3410" href="?id=zp3409#zp3410">Understanding Lab Test Results</a></li></ul></div><div class="HwNavigationSection HwCreditsSection HwCreditsWithoutNavstack HwSectionCredits" id="sec-zd1440-Credits"><h2 class="HwSectionTitle">Credits</h2> <div class="HwContentInformation"> <div class="HwLastUpdated"> <p> <span class="HwInfoLabel">Current as of: </span> May 14, 2023 </p> </div> <div class="HwCredits"> <p> <span class="HwInfoLabel">Author: </span>Healthwise Staff<br><span><b><a class="HwLinkExternal" href="https://www.healthwise.org/mdreviewboard.aspx?lang=en-us" title="Opens in a new window"><span class="HwLinkText">Clinical Review Board:</span></a></b></span> All Healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.</p> </div> </div> </div></div><div class="HwCustom" id="HwCustomContentBottom"> </div><div class="HwContentNavigation"><div 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