Health tool map
Health screening
Clinical scores, lab measures, and screening calculations.
Choose the tool whose inputs and output match your task. Check each calculator’s assumptions and limitations before using its result.
Latest update:
Screening tools organize clinical measures — readings, scores, and lab-style calculations — into educational context. The blood pressure calculator places a systolic and diastolic reading into common adult categories, and the blood sugar calculator converts glucose between mg/dL and mmol/L with timing-based educational labels. Structured scoring pages like the 4Ts score calculator sum clinical domains into pretest-probability bands, while the ankle-brachial index calculator compares arm and ankle pressures. These pages are informational: a single calculation cannot diagnose a condition, and repeated, properly measured readings plus clinical context change interpretation. Related body and measurement tools live in the Health collection.
9 of 9 calculators
Health screening9 calculators
4Ts Score Calculator
Estimate 4Ts pretest probability for heparin-induced thrombocytopenia by summing thrombocytopenia, timing, thrombosis, and other-cause scores.
Updated
Verified
6 Minute Walk Test Calculator
Compare six-minute walk distance with sex-specific predicted values, lower limits, and percentage expected using the standard 6-minute walk distance equation.
Updated
Verified
Acid Base Calculator
Interpret pH, PCO2, bicarbonate, sodium, chloride, and albumin for educational acid-base pattern review, including anion gap and albumin correction.
Updated
Verified
Ankle-Brachial Index (ABI) Calculator
Calculate ankle-brachial index from arm and ankle systolic pressures, with lower-ABI interpretation, PAD context, limitations, and medical disclaimer.
Updated
Verified
Blood Pressure Calculator
Categorize an adult blood pressure reading from systolic and diastolic values, using the exact threshold logic in the calculator and clinical cautions.
Updated
Verified
Blood Sugar Calculator
Convert blood glucose between mg/dL and mmol/L, see the exact conversion factor, and compare readings with educational ADA-style categories.
Updated
Verified
Drug Half Life Calculator (Remaining Concentration)
Estimate remaining drug concentration from initial amount, half-life, and elapsed time using exponential decay, with pharmacokinetic cautions.
Updated
Verified
Eye Health Lifestyle Worksheet
Explore an unvalidated activity, diet, and smoking worksheet for eye-health education. It does not test 20/20 vision or estimate your risk of eye disease.
Updated
Verified
Noise Exposure Calculator (OSHA or NIOSH Dose)
Calculate occupational noise exposure dose under one selected OSHA or NIOSH criterion while keeping their assumptions separate.
Updated
Verified
4Ts Score Calculator
Estimate 4Ts pretest probability for heparin-induced thrombocytopenia by summing thrombocytopenia, timing, thrombosis, and other-cause scores.
Updated
Verified
6 Minute Walk Test Calculator
Compare six-minute walk distance with sex-specific predicted values, lower limits, and percentage expected using the standard 6-minute walk distance equation.
Updated
Verified
Acid Base Calculator
Interpret pH, PCO2, bicarbonate, sodium, chloride, and albumin for educational acid-base pattern review, including anion gap and albumin correction.
Updated
Verified
Ankle-Brachial Index (ABI) Calculator
Calculate ankle-brachial index from arm and ankle systolic pressures, with lower-ABI interpretation, PAD context, limitations, and medical disclaimer.
Updated
Verified
Blood Pressure Calculator
Categorize an adult blood pressure reading from systolic and diastolic values, using the exact threshold logic in the calculator and clinical cautions.
Updated
Verified
Blood Sugar Calculator
Convert blood glucose between mg/dL and mmol/L, see the exact conversion factor, and compare readings with educational ADA-style categories.
Updated
Verified
Drug Half Life Calculator (Remaining Concentration)
Estimate remaining drug concentration from initial amount, half-life, and elapsed time using exponential decay, with pharmacokinetic cautions.
Updated
Verified
Eye Health Lifestyle Worksheet
Explore an unvalidated activity, diet, and smoking worksheet for eye-health education. It does not test 20/20 vision or estimate your risk of eye disease.
Updated
Verified
Noise Exposure Calculator (OSHA or NIOSH Dose)
Calculate occupational noise exposure dose under one selected OSHA or NIOSH criterion while keeping their assumptions separate.
Updated
Verified
Frequently asked questions
- What does the 4Ts score estimate?
- The 4Ts score estimates pretest probability of immune heparin-induced thrombocytopenia before definitive laboratory confirmation. It organizes bedside information about platelet fall, timing after heparin exposure, thrombosis, and other possible causes. It supports clinical reasoning but does not diagnose HIT by itself.
- How is the total score calculated?
- the calculator assigns zero, one, or two points for each of four domains: thrombocytopenia, timing, thrombosis, and other causes. The calculation converts the selected values to numbers and adds them. The possible total ranges from zero to eight points.
- What is a low 4Ts score?
- The calculator labels zero to three points as low probability and displays less than 1 percent probability of HIT. A low score is most useful when the platelet history is accurate and the selected options truly match the clinical situation.