Kidney Stone Risk Calculator
Assess kidney stone formation risk using hydration status, personal/family history, BMI, and metabolic factors. Reference tool for identifying high-risk individuals and preventive measures.
Formula
Risk Score = (Hydration + History + Family + BMI + Diabetes) × 20
- Urine <1500mL/day = high risk
- Personal history = major risk factor
- Adequate hydration is primary prevention
High-Risk Patient
Inputs
- Daily Urine Output (mL): 1200 mL
- Personal Stone History: yes
- Family History of Stones: no
- BMI (kg/m²): 28 kg/m²
- Diabetes: no
Dehydrated (1200mL) + prior stone = High Risk. Needs fluid increase and preventive measures.
Frequently asked questions
How much water should I drink?
At least 2-3L daily to maintain urine output >2000mL. More if history of stones.