What this calculator does
The triglycerides to HDL ratio divides a fasting blood triglyceride level by HDL ("good") cholesterol, both usually reported in milligrams per decilitre on a standard lipid panel. It is a separate figure from the more familiar total cholesterol to HDL ratio, and some clinicians and researchers cite it as an additional marker linked to insulin resistance and cardiovascular risk.
This calculator only does the division; it does not diagnose anything or replace clinical interpretation. Lipid panel results depend on fasting state, medication, and lab-to-lab variation, and what any individual ratio actually means for a given person's health is a conversation to have with a doctor, not a number to self-interpret.
The formula
Divide the triglyceride value by the HDL cholesterol value from the same blood test, both in the same units (typically mg/dL), to get the ratio.
| Term | Meaning |
|---|---|
| Triglycerides | A type of fat circulating in the blood, measured on a standard lipid panel, usually after fasting. |
| HDL cholesterol | High-density lipoprotein cholesterol, often called "good" cholesterol, which helps clear other cholesterol from the bloodstream. |
| Triglycerides:HDL ratio | Triglycerides divided by HDL, a figure sometimes used alongside other lipid measures as a cardiovascular reference point. |
The inputs explained
| Field | What to enter |
|---|---|
| Triglycerides (mg/dL) | The triglyceride level from a lipid panel, in mg/dL. |
| HDL cholesterol (mg/dL) | The HDL cholesterol level from the same lipid panel, in mg/dL. |
When to use it
Reviewing a lipid panel alongside a doctor
Working out this ratio ahead of an appointment can help frame questions to ask, though the doctor's interpretation of the full panel, not this single number, is what matters.
Tracking a value over repeat testing
Comparing this ratio across lipid panels taken months apart shows the direction of change, which is often more informative than any single reading on its own.
Understanding a number seen in research or a health app
This ratio appears in various health tracking tools and research summaries; calculating it directly from a personal lipid panel shows exactly where a quoted figure comes from.
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
Ratio across a range of triglyceride levels at a fixed HDL
A steady HDL of 50 mg/dL, against a range of triglyceride readings.
| Triglycerides | Triglycerides to HDL ratio |
|---|---|
| 80 mg/dL | 1.6:1 |
| 100 mg/dL | 2.0:1 |
| 120 mg/dL | 2.4:1 |
| 150 mg/dL | 3.0:1 |
| 200 mg/dL | 4.0:1 |
| 250 mg/dL | 5.0:1 |
Ratio across a range of HDL levels at a fixed triglyceride reading
A fixed triglyceride reading of 150 mg/dL, against a range of HDL levels.
| HDL cholesterol | Triglycerides to HDL ratio |
|---|---|
| 30 mg/dL | 5.0:1 |
| 40 mg/dL | 3.8:1 |
| 50 mg/dL | 3.0:1 |
| 60 mg/dL | 2.5:1 |
| 70 mg/dL | 2.1:1 |
| 90 mg/dL | 1.7:1 |
Questions
What is considered a good triglycerides to HDL ratio?
Figures cited in research and by some clinicians often put a ratio below 2:1 as favourable and above 4:1 as a marker worth discussing with a doctor, but there is no single universally agreed cutoff, and interpretation should come from a healthcare professional reviewing the full lipid panel, not this ratio alone.
How is this different from the total cholesterol to HDL ratio?
The cholesterol ratio calculator divides total cholesterol by HDL, a distinct and more commonly reported figure. This ratio instead uses triglycerides in place of total cholesterol, and the two are cited for different, though related, purposes.
Do I need to fast before this blood test?
Triglyceride levels can be significantly affected by recent food intake, so many lipid panels are taken after a fasting period. Follow whatever preparation your doctor or lab specifies, since that affects how comparable a reading is to reference ranges.
Can this ratio replace a doctor's assessment?
No. This is a single arithmetic ratio from two lab values, offered as a general reference figure only. Cardiovascular risk depends on many other factors, and any concern about a lipid panel result should be discussed with a doctor.
For the more commonly reported total cholesterol to HDL figure, see the cholesterol ratio calculator.