Weight
kg to/from lb
1 kg = 2.20462 lb
Formula: lb x 0.45359237 = kg
Source: NIST SI
Medical Unit Converter
Convert common clinical units between SI and conventional values for labs, vitals, height, weight, and pressure.
Basic
Length / height
cm to/from in
1 in = 2.54 cm
Formula: in x 2.54 = cm
Source: NIST SI
Temperature
deg C to/from deg F
deg F = (deg C x 9/5) + 32
Formula: (deg F - 32) x 5/9 = deg C
Source: NIST SI
Fluid volume
mL to/from fl oz
1 fl oz = 29.5735 mL
Formula: fl oz x 29.5735 = mL
Source: NIST SI
Renal
Creatinine
umol/L to/from mg/dL
1 mg/dL = 88.4 umol/L
Formula: mg/dL x 88.4 = umol/L
Source: UCUM clinical units
Creatinine (urine)
mmol/L to/from mg/dL
1 mg/dL = 0.0884 mmol/L
Formula: mg/dL x 0.0884 = mmol/L
Source: UCUM clinical units
BUN / urea
mmol/L to/from mg/dL
1 mg/dL BUN = 0.357 mmol/L urea
Formula: mg/dL / 2.8 = mmol/L
Source: UCUM clinical units
Uric acid
umol/L to/from mg/dL
1 mg/dL = 59.48 umol/L
Formula: mg/dL x 59.48 = umol/L
Source: UCUM clinical units
Metabolic
Glucose
mmol/L to/from mg/dL
1 mmol/L = 18.0182 mg/dL
Formula: mg/dL / 18.0182 = mmol/L
Source: UCUM clinical units
Cholesterol
mmol/L to/from mg/dL
1 mmol/L = 38.67 mg/dL
Formula: mg/dL x 0.02586 = mmol/L
Source: UCUM clinical units
Triglycerides
mmol/L to/from mg/dL
1 mmol/L = 88.57 mg/dL
Formula: mg/dL x 0.01129 = mmol/L
Source: UCUM clinical units
HbA1c
mmol/mol to/from %
NGSP % and IFCC mmol/mol use master equations
Formula: IFCC = (10.93 x NGSP) - 23.50
Source: NGSP / IFCC
Liver
Bilirubin
umol/L to/from mg/dL
1 mg/dL = 17.1 umol/L
Formula: mg/dL x 17.1 = umol/L
Source: UCUM clinical units
Albumin
g/L to/from g/dL
1 g/dL = 10 g/L
Formula: g/dL x 10 = g/L
Source: UCUM clinical units
Ammonia
umol/L to/from ug/dL
1 ug/dL = 0.587 umol/L
Formula: ug/dL x 0.587 = umol/L
Source: UCUM clinical units
Direct bilirubin
umol/L to/from mg/dL
1 mg/dL = 17.1 umol/L
Formula: mg/dL x 17.1 = umol/L
Source: UCUM clinical units
Lytes
Sodium
mmol/L to/from mEq/L
1 mmol/L = 1 mEq/L for monovalent ions
Formula: same numeric value
Source: UCUM clinical units
Potassium
mmol/L to/from mEq/L
1 mmol/L = 1 mEq/L for monovalent ions
Formula: same numeric value
Source: UCUM clinical units
Calcium
mmol/L to/from mg/dL
1 mmol/L = 4 mg/dL
Formula: mg/dL / 4 = mmol/L
Source: UCUM clinical units
Phosphate
mmol/L to/from mg/dL
1 mmol/L = 3.1 mg/dL
Formula: mg/dL / 3.1 = mmol/L
Source: UCUM clinical units
Magnesium
mmol/L to/from mg/dL
1 mmol/L = 2.43 mg/dL
Formula: mg/dL / 2.43 = mmol/L
Source: UCUM clinical units
Heme
Hemoglobin
g/L to/from g/dL
1 g/dL = 10 g/L
Formula: g/dL x 10 = g/L
Source: UCUM clinical units
Iron
umol/L to/from ug/dL
1 ug/dL = 0.179 umol/L
Formula: ug/dL x 0.179 = umol/L
Source: UCUM clinical units
Ferritin
ug/L to/from ng/mL
1 ug/L = 1 ng/mL
Formula: same numeric value
Source: UCUM clinical units
D-dimer FEU
mg/L FEU to/from ng/mL FEU
1 mg/L FEU = 1000 ng/mL FEU
Formula: ng/mL FEU / 1000 = mg/L FEU
Reverse formula: mg/L FEU x 1000 = ng/mL FEU
Keeps FEU units together. Do not convert FEU and DDU without local assay context.
WBC
10^9/L to/from 10^3/uL
1 x 10^9/L = 1 x 10^3/uL
Formula: same numeric value
Source: UCUM clinical units
Platelets
10^9/L to/from 10^3/uL
1 x 10^9/L = 1 x 10^3/uL
Formula: same numeric value
Source: UCUM clinical units
RBC
10^12/L to/from 10^6/uL
1 x 10^12/L = 1 x 10^6/uL
Formula: same numeric value
Source: UCUM clinical units
Hematocrit
L/L to/from %
1 L/L = 100%
Formula: % / 100 = L/L
Source: UCUM clinical units
Endocrine
Free T4
pmol/L to/from ng/dL
1 ng/dL = 12.87 pmol/L
Formula: ng/dL x 12.87 = pmol/L
Source: UCUM clinical units
TSH
mIU/L to/from uIU/mL
1 mIU/L = 1 uIU/mL
Formula: same numeric value
Source: UCUM clinical units
Testosterone
nmol/L to/from ng/dL
1 ng/dL = 0.0347 nmol/L
Formula: ng/dL x 0.0347 = nmol/L
Source: UCUM clinical units
PTH
pmol/L to/from pg/mL
1 pg/mL = 0.106 pmol/L
Formula: pg/mL x 0.106 = pmol/L
Reverse formula: pmol/L / 0.106 = pg/mL
Assay formats and fragments vary; use local laboratory guidance for interpretation.
Source: Clinical intact PTH conversion / UCUM clinical units
Prolactin
mIU/L to/from ng/mL
1 ng/mL = 21.2 mIU/L
Formula: ng/mL x 21.2 = mIU/L
Reverse formula: mIU/L / 21.2 = ng/mL
This factor applies to IS 84/500-equivalent prolactin reporting; assay calibration can vary.
Free T3
pmol/L to/from pg/mL
1 pmol/L = 0.65097 pg/mL
Formula: pg/mL / 0.65097 = pmol/L
Source: Clinical molecular-weight conversion / UCUM clinical units
Total T4
nmol/L to/from ug/dL
1 ug/dL = 12.87 nmol/L
Formula: ug/dL x 12.87 = nmol/L
Source: Clinical molecular-weight conversion / UCUM clinical units
Total T3
nmol/L to/from ng/dL
1 nmol/L = 65.1 ng/dL
Formula: ng/dL x 0.01536 = nmol/L
Source: Clinical molecular-weight conversion / UCUM clinical units
Cortisol
nmol/L to/from ug/dL
1 ug/dL = 27.59 nmol/L
Formula: ug/dL x 27.59 = nmol/L
Source: Clinical molecular-weight conversion / UCUM clinical units
Estradiol
pmol/L to/from pg/mL
1 pg/mL = 3.671 pmol/L
Formula: pg/mL x 3.671 = pmol/L
Source: Clinical molecular-weight conversion / UCUM clinical units
Progesterone
nmol/L to/from ng/mL
1 ng/mL = 3.18 nmol/L
Formula: ng/mL x 3.18 = nmol/L
Reverse formula: nmol/L / 3.18 = ng/mL
DHEA-S
umol/L to/from ug/dL
1 ug/dL = 0.02714 umol/L
Formula: ug/dL x 0.02714 = umol/L
Reverse formula: umol/L / 0.02714 = ug/dL
Insulin
pmol/L to/from uIU/mL
1 uIU/mL = 6.945 pmol/L
Formula: uIU/mL x 6.945 = pmol/L
Reverse formula: pmol/L / 6.945 = uIU/mL
Insulin immunoassay calibration can vary; use local laboratory guidance for high-stakes interpretation.
Source: Common clinical insulin unit conversion / UCUM clinical units
C-peptide
nmol/L to/from ng/mL
1 ng/mL = 0.331 nmol/L
Formula: ng/mL x 0.331 = nmol/L
Reverse formula: nmol/L / 0.331 = ng/mL
Resp
Pressure
kPa to/from mmHg
1 mmHg = 0.133322 kPa
Formula: mmHg x 0.133322 = kPa
Source: UCUM / NIST SI
Cardiac
Troponin
ng/L to/from ng/mL
1 ng/mL = 1000 ng/L
Formula: ng/mL x 1000 = ng/L
Reverse formula: ng/L / 1000 = ng/mL
Mass unit conversion only; clinical cut-offs are assay-specific.
BNP / NT-proBNP
ng/L to/from pg/mL
1 pg/mL = 1 ng/L
Formula: same numeric value
Unit conversion only; BNP and NT-proBNP cut-offs are not interchangeable.
Chem
Chloride
mmol/L to/from mEq/L
1 mmol/L = 1 mEq/L for monovalent ions
Formula: same numeric value
Source: UCUM clinical units
Bicarbonate
mmol/L to/from mEq/L
1 mmol/L = 1 mEq/L for bicarbonate
Formula: same numeric value
Source: UCUM clinical units
Lactate
mmol/L to/from mg/dL
1 mmol/L = 9.008 mg/dL
Formula: mg/dL / 9.008 = mmol/L
Source: Clinical molecular-weight conversion / UCUM clinical units
Total protein
g/L to/from g/dL
1 g/dL = 10 g/L
Formula: g/dL x 10 = g/L
Source: UCUM clinical units
Globulin
g/L to/from g/dL
1 g/dL = 10 g/L
Formula: g/dL x 10 = g/L
Source: UCUM clinical units
CRP
mg/L to/from mg/dL
1 mg/dL = 10 mg/L
Formula: mg/dL x 10 = mg/L
Source: UCUM clinical units
Enzymes
AST
ukat/L to/from U/L
1 U/L = 0.016667 ukat/L
Formula: U/L x 0.016667 = ukat/L
ALT
ukat/L to/from U/L
1 U/L = 0.016667 ukat/L
Formula: U/L x 0.016667 = ukat/L
Alkaline phosphatase
ukat/L to/from U/L
1 U/L = 0.016667 ukat/L
Formula: U/L x 0.016667 = ukat/L
GGT
ukat/L to/from U/L
1 U/L = 0.016667 ukat/L
Formula: U/L x 0.016667 = ukat/L
LDH
ukat/L to/from U/L
1 U/L = 0.016667 ukat/L
Formula: U/L x 0.016667 = ukat/L
Amylase
ukat/L to/from U/L
1 U/L = 0.016667 ukat/L
Formula: U/L x 0.016667 = ukat/L
Lipase
ukat/L to/from U/L
1 U/L = 0.016667 ukat/L
Formula: U/L x 0.016667 = ukat/L
CK / CPK
ukat/L to/from U/L
1 U/L = 0.016667 ukat/L
Formula: U/L x 0.016667 = ukat/L
Vitamins
25-OH Vitamin D
nmol/L to/from ng/mL
1 ng/mL = 2.496 nmol/L
Formula: ng/mL x 2.496 = nmol/L
Source: Clinical molecular-weight conversion / UCUM clinical units
Vitamin B12
pmol/L to/from pg/mL
1 pg/mL = 0.7378 pmol/L
Formula: pg/mL x 0.7378 = pmol/L
Reverse formula: pmol/L / 0.7378 = pg/mL
Folate
nmol/L to/from ng/mL
1 ng/mL = 2.266 nmol/L
Formula: ng/mL x 2.266 = nmol/L
Reverse formula: nmol/L / 2.266 = ng/mL
TDM
Theophylline
umol/L to/from ug/mL
1 ug/mL = 5.5506 umol/L
Formula: ug/mL x 5.5506 = umol/L
Reverse formula: umol/L / 5.5506 = ug/mL
Parent-drug mass conversion; therapeutic ranges and toxicity thresholds remain local-lab dependent.
Valproate
umol/L to/from ug/mL
1 ug/mL = 6.9343 umol/L
Formula: ug/mL x 6.9343 = umol/L
Reverse formula: umol/L / 6.9343 = ug/mL
Carbamazepine
umol/L to/from ug/mL
1 ug/mL = 4.2324 umol/L
Formula: ug/mL x 4.2324 = umol/L
Reverse formula: umol/L / 4.2324 = ug/mL
Phenytoin
umol/L to/from ug/mL
1 ug/mL = 3.9640 umol/L
Formula: ug/mL x 3.9640 = umol/L
Reverse formula: umol/L / 3.9640 = ug/mL
Total phenytoin interpretation depends on albumin, renal function, and free fraction.
Methotrexate
umol/L to/from mg/L
1 mg/L = 2.2007 umol/L
Formula: mg/L x 2.2007 = umol/L
Reverse formula: umol/L / 2.2007 = mg/L
Use local high-dose methotrexate protocols for timing, rescue, and toxicity interpretation.
Lithium
mmol/L to/from mg/L
1 mmol/L = 6.94 mg/L
Formula: mg/L / 6.94 = mmol/L
Reverse formula: mmol/L x 6.94 = mg/L
Digoxin
nmol/L to/from ng/mL
1 ng/mL = 1.28 nmol/L
Formula: ng/mL x 1.28 = nmol/L
Reverse formula: nmol/L / 1.28 = ng/mL
Tox
Ethanol
mmol/L to/from mg/dL
1 mmol/L = 4.607 mg/dL
Formula: mg/dL / 4.607 = mmol/L
Reverse formula: mmol/L x 4.607 = mg/dL
Acetaminophen
umol/L to/from ug/mL
1 ug/mL = 6.615 umol/L
Formula: ug/mL x 6.615 = umol/L
Reverse formula: umol/L / 6.615 = ug/mL
Salicylate
mmol/L to/from mg/dL
1 mmol/L = 13.812 mg/dL
Formula: mg/dL / 13.812 = mmol/L
Reverse formula: mmol/L x 13.812 = mg/dL