Medical Tools – Small Tools. Big Help.

Welcome to SmallToolsOnline.com — your handy online toolkit for health, fitness, and wellness calculations. Our collection of smart browser-based medical tools helps you measure, monitor, and analyze various health parameters instantly — all without installing any software or sharing personal data.

From simple BMI calculators and body fat estimators to advanced pregnancy due date finders, heart rate trackers, and calorie requirement analyzers, every tool runs directly in your browser using fast JavaScript processing.

Whether you're a health enthusiast, medical student, or just someone keeping track of your wellness — Small Tools Online helps you do it smarter, faster, and easier.

All Medical Tools

CrCl
Creatinine Clearance (Cockcroft-Gault)
Estimate kidney function from creatinine, age, weight.
GFR
Glomerular Filtration Rate (GFR) Estimator
Estimate GFR from lab values & patient data.
Mean Arterial Pressure (MAP) Calculator
Calculate MAP using systolic & diastolic BP.
QTc
Corrected QT Interval (QTc) Calculator
Compute QTc using Bazett or Fridericia formulas.
Z-Score
BMI Z-Score Calculator (Children)
Calculate BMI Z-score for pediatric patients.
AdjBW
Adjusted Body Weight (AdjBW) Calculator
Calculate adjusted body weight for dosing in obese patients.
AG
Anion Gap Calculator
Calculate anion gap from electrolyte values.
Ca²⁺
Corrected Calcium for Albumin Calculator
Correct serum calcium value given albumin level.
MCV
Mean Corpuscular Volume (MCV) Calculator
Compute MCV from hematology parameters.
A/G
Albumin–Globulin (A/G) Ratio Calculator
Calculate albumin to globulin ratio from lab values.
Pulse Pressure Calculator
Calculate pulse pressure (systolic minus diastolic BP).
mL/kg
Estimated Daily Fluid Requirement Calculator
Estimate fluid needs per body weight and condition.
BMI%
Body Mass Index Percentile Calculator (Pediatrics)
Compute BMI percentile for children based on age & sex.
HDL
Cholesterol Ratio Calculator
Calculate HDL, LDL, and total cholesterol ratios.
LDL
LDL Cholesterol (Friedewald Formula)
Estimate LDL from total cholesterol, HDL, and triglycerides.
TG/HDL
Triglyceride to HDL Ratio Calculator
Evaluate cardiovascular risk based on lipid ratio.
P-Y
Smoking Pack-Year Calculator
Calculate smoking exposure in pack-years.
mg/dL
Glucose Unit Converter
Convert blood glucose between mmol/L and mg/dL.
ISF
Insulin Sensitivity Factor Calculator
Estimate glucose drop per unit of insulin.
C/I
Carbohydrate to Insulin Ratio Calculator
Find carb-to-insulin dosing ratio.
HbA1c
Average Blood Glucose from HbA1c
Estimate average glucose from HbA1c value.
L/H
LDL/HDL Ratio Calculator
Calculate LDL-to-HDL cholesterol ratio.
TG
Triglycerides Conversion mg/dL ⇄ mmol/L
Convert triglyceride units easily.
Serum Osmolality Calculator
Compute serum osmolality from Na⁺, glucose, and BUN.
L/T
LDL Cholesterol to Total Cholesterol Ratio
Calculate LDL/Total Cholesterol ratio for risk assessment.
eAG
Estimated Average Glucose (eAG) Converter
Convert HbA1c to estimated average glucose level.
QT
QT Interval Bazett Correction
Calculate QTc using the Bazett correction formula.
Mean Blood Pressure Calculator
Compute mean BP from systolic and diastolic pressures.
BMI'
BMI Prime Calculator
Calculate BMI Prime to compare to optimal BMI (25).
W%
Pediatric Weight for Age Percentile
Estimate child weight percentile by age and sex.
H%
Height for Age Percentile
Find child height percentile using WHO standards.
Pediatric BMI Percentile Chart
Visualize BMI percentile for children by age group.
-kCal
Calorie Deficit Planner
Plan calorie intake for gradual fat loss.