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Gather Your Health Metrics
Write down your age, biological sex, family history of diabetes, blood pressure status, and physical activity habits. Note down your height (in inches) and weight (in pounds).
Calculate Your BMI
Multiply your height by itself. Divide your weight by this number, then multiply the result by 703. Match your resulting BMI to the scoring categories: Under 25 (0 pts), 25-29.9 (1 pt), 30-39.9 (2 pts), or 40+ (3 pts).
Assign Points to Each Risk Factor
Go through the point system: Age (0 to 3 pts), Sex (0 to 1 pt, plus 1 pt if female with gestational diabetes history), Family History (0 or 1 pt), High Blood Pressure (0 or 1 pt), and Physical Inactivity (0 or 1 pt).
Sum Your Points and Find Your Risk Level
Add all your points together. A score of 5 or higher indicates an increased risk of developing Type 2 diabetes. Share your results with your doctor to discuss preventative care.
Taking charge of your health is one of the most empowering things you can do! Type 2 diabetes is a common condition, but the good news is that it is often preventable. By understanding your risk factors early, you can make simple, positive lifestyle changes to protect your future self.
In this guide, we will walk you through how to calculate your diabetes risk score by hand using the standard, scientifically validated points system developed by health organizations like the American Diabetes Association (ADA).
Why Calculate This Manually?
While online calculators are incredibly convenient, calculating your score by hand helps you understand why certain factors matter. It highlights exactly which areas of your lifestyle (like physical activity) or biology (like family history) contribute most to your overall risk profile.
The Diabetes Risk Scoring System
To find your risk score, we look at six primary risk factors. Each factor is assigned a point value. At the end, we sum these points to find your total score.
Prerequisites: What You Need Before You Start
- Your current age
- Your height and weight (to determine your Body Mass Index, or BMI)
- Your family medical history (specifically parents or siblings)
- Your blood pressure status
- Your physical activity habits
The Point Formula Breakdown
1. Age Points
- Under 40 years: 0 points
- 40 to 49 years: 1 point
- 50 to 59 years: 2 points
- 60 years or older: 3 points
2. Biological Sex Points
- Man: 1 point
- Woman: 0 points
- Note for women: If you have ever been diagnosed with gestational diabetes during pregnancy, add 1 point.
3. Family History Points
- Have a mother, father, sister, or brother with diabetes: 1 point
- No immediate family history: 0 points
4. High Blood Pressure Points
- Have been diagnosed with high blood pressure (or take medication for it): 1 point
- Normal blood pressure: 0 points
5. Physical Activity Points
- Not physically active (sedentary lifestyle): 1 point
- Physically active (regular exercise): 0 points
6. Weight & BMI Points
First, calculate your BMI using the formula:
BMI = (Weight in pounds / (Height in inches * Height in inches)) * 703
Once you have your BMI, assign points as follows:
- BMI under 25 (Normal weight): 0 points
- BMI 25 to 29.9 (Overweight): 1 point
- BMI 30 to 39.9 (Obese): 2 points
- BMI 40 or higher (Severely Obese): 3 points
Worked Example: Calculating by Hand
Let's calculate the risk score for Marcus, a 52-year-old man who is 5 feet 10 inches tall (70 inches) and weighs 210 pounds. His mother has type 2 diabetes. He takes medication for high blood pressure, and he works a desk job with very little physical activity.
- Step 1: Age. Marcus is 52. This falls in the 50-59 range. (2 points)
- Step 2: Sex. Marcus is a man. (1 point)
- Step 3: Family History. His mother has diabetes. (1 point)
- Step 4: High Blood Pressure. He takes blood pressure medication. (1 point)
- Step 5: Physical Activity. He is inactive. (1 point)
- Step 6: Weight/BMI. Let's calculate Marcus's BMI:
BMI = (210 / (70 * 70)) * 703BMI = (210 / 4900) * 703BMI = 0.0428 * 703 ≈ 30.1A BMI of 30.1 falls in the Obese range (30 to 39.9). (2 points)
Total Score Calculation for Marcus:
Total Score = 2 (Age) + 1 (Sex) + 1 (Family) + 1 (BP) + 1 (Activity) + 2 (BMI) = 8 points
Interpreting the Score
- Score of 0 to 4: Lower risk. Keep up your healthy habits!
- Score of 5 or higher: Increased risk for type 2 diabetes.
Because Marcus scored an 8, he is at an increased risk. He should share these findings with his healthcare provider for a simple blood sugar test (like an A1C test) and discuss preventative steps.
Common Pitfalls to Avoid
- Confusing Type 1 and Type 2 Diabetes: This risk tool is specifically designed for Type 2 diabetes, which is highly influenced by lifestyle and genetics. Type 1 diabetes is an autoimmune condition and cannot be calculated this way.
- Miscalculating BMI: Ensure you square your height in inches before dividing your weight by it. If you use metric, the formula is
Weight in kg / (Height in meters * Height in meters). - Overestimating Activity Levels: To score a '0' on the physical activity section, you should be getting at least 150 minutes of moderate exercise per week. If you only walk occasionally, it is safer to count it as inactive (1 point) to get a realistic risk assessment.
When to Use an Online Calculator
Calculating your score by hand is a great educational exercise! However, you should use an online calculator when you want to save time on the BMI math, or when you want to quickly test different 'what-if' scenarios (for example, seeing how much your risk score drops if you lose 15 pounds or start exercising regularly).