LDL Cholesterol Calculator

LDL is calculated using the Friedewald equation: LDL = Total Cholesterol − HDL − (Triglycerides ÷ 5). The Triglycerides ÷ 5 component estimates VLDL, which, when subtracted from total cholesterol along with HDL, gives the LDL fraction. This formula is valid when triglycerides are below 400 mg/dL, and the blood sample is fasting.

Optimal LDL is below 100 mg/dL for most adults. Near optimal is 100–129 mg/dL. Borderline high is 130–159 mg/dL. High is 160–189 mg/dL. Very high is 190 mg/dL and above. However, the right target depends on your cardiovascular risk profile — someone with diabetes or a previous heart attack needs LDL below 70 mg/dL or even below 55 mg/dL.

Older or basic lipid profile formats report total cholesterol, HDL, and triglycerides only, leaving LDL to be calculated. Most modern labs now include a directly measured or calculated LDL value. If your report does not show LDL, use this calculator with your other three values. If triglycerides are above 400 mg/dL, the formula is not reliable — ask your doctor for a direct LDL measurement.

Calculated LDL uses the Friedewald equation from total cholesterol, HDL, and triglycerides values. Direct LDL is measured through a separate chemical assay that isolates LDL particles directly. Both methods are accurate at normal triglyceride levels. Direct LDL is more reliable when triglycerides are above 200–400 mg/dL or in people with very low LDL. Most labs use calculated LDL for routine testing; direct LDL is used when the formula is unreliable.

The most common causes of high LDL in India are excess saturated fat intake (ghee in large quantities, full-fat dairy, coconut oil, vanaspati), low soluble fibre intake, physical inactivity, and overweight. Genetic causes include familial hypercholesterolaemia, which causes severely elevated LDL from birth regardless of diet. Secondary causes include hypothyroidism, diabetes, kidney disease, and certain medications (corticosteroids, some beta-blockers, progestins).

Yes, in many cases. Dietary changes — reducing saturated fat, increasing soluble fibre from oats and legumes, eliminating vanaspati, adding nuts — can lower LDL by 15–25% with consistent effort over 8–12 weeks. Whether medication is needed depends on how high your LDL is, your overall cardiovascular risk, and whether LDL responds adequately to lifestyle changes after 3–6 months. People with familial hypercholesterolaemia (LDL above 190 mg/dL) almost always require medication alongside diet.

LDL of 130 mg/dL is classified as borderline high. For a young, healthy adult with no risk factors, it warrants dietary attention but is not immediately dangerous. For someone with diabetes, hypertension, or a family history of heart disease, 130 mg/dL is above the recommended target (below 70–100 mg/dL depending on risk) and requires active management. Context — your age, other risk factors, and complete lipid profile — determines how seriously 130 mg/dL should be treated.

For healthy adults, a fasting lipid profile every 4–6 years is recommended from age 20. Testing frequency increases with age and risk factors — annually for those over 40, or every 1–2 years for anyone with diabetes, hypertension, or a family history of heart disease. People on statin therapy are typically tested every 3–6 months initially to assess treatment response, then annually once LDL is at target.