Triglyceride Glucose Index Calculator

Calculator

Fasting triglycerides

Fasting glucose

Input unit

Formula mode

Decimal places

Fasting hours

Lower reference limit

Higher reference limit

Age

Sex

Height cm

Weight kg

Waist cm

Notes for report

Example Data Table

Example	Triglycerides mg/dL	Glucose mg/dL	Common Formula	TyG Result
A	80	90	ln((80 × 90) / 2)	8.189
B	150	100	ln((150 × 100) / 2)	8.923
C	220	125	ln((220 × 125) / 2)	9.529

Formula Used

Common research scale: TyG = ln((fasting triglycerides × fasting glucose) / 2). Values must be in mg/dL before calculation.

Alternative corrected scale: TyG = ln(fasting triglycerides × fasting glucose) / 2. The calculator includes it for comparison across studies.

When mmol/L is selected, triglycerides are multiplied by 88.57. Glucose is multiplied by 18.0182. These converted values are used in the formulas.

How to Use This Calculator

Enter fasting triglycerides and fasting glucose from the same lab report.
Select the unit shown on the report.
Choose the formula mode that matches your reference source.
Add fasting hours and optional body measurements.
Set custom reference limits, or leave them blank.
Submit the form and review the result above the inputs.
Download CSV or PDF for records.

Understanding the Triglyceride Glucose Index

Overview

The triglyceride glucose index, often called TyG, combines two fasting blood markers. It uses triglycerides and fasting glucose. These values are common in lipid and metabolic panels. The index is popular because it is simple. It does not need fasting insulin. It can support early review of insulin resistance patterns.

Clinical Meaning

TyG is not a diagnosis. It is a screening calculation. A high value may suggest reduced insulin sensitivity. It may also reflect diet, medication, illness, stress, or recent nonfasting intake. Results should be reviewed with clinical history. A clinician can compare the result with HbA1c, waist size, blood pressure, HDL cholesterol, and other markers.

Units and Methods

This calculator accepts values in mg/dL or mmol/L. It converts mmol/L values before calculation. Triglycerides use a factor of 88.57. Glucose uses a factor near 18.0182. The common research formula is the natural log of triglycerides multiplied by glucose, then divided by two inside the logarithm. Some studies place the division outside the logarithm. The form includes both methods because published papers vary.

Reference Bands

The reference band is flexible. Different populations use different cutoffs. Age, sex, ethnicity, body composition, and study design can change interpretation. For that reason, the tool lets you set your own lower and higher reference limits. It also reports TyG BMI and TyG waist products when those optional values are entered.

Input Quality

Good inputs matter. Use fasting laboratory numbers when possible. Enter triglycerides and fasting glucose from the same test date. Select the correct unit. Add optional notes when saving a report. The CSV export is useful for spreadsheets. The PDF export is useful for records or patient education.

Safe Use

The result should be seen as a conversation starter. It can help identify patterns over time. It can also make lab changes easier to explain. However, treatment decisions need medical advice. Repeat testing may be needed when fasting status is uncertain. Emergency symptoms require urgent care, not a calculator.

Tracking

For best tracking, save the test date, fasting hours, and recent medication changes. Compare results only when conditions are similar. Sudden changes may need repeat testing. Stable trends are usually more useful than one isolated value. Keep reports with other lab summaries, so future reviews stay consistent, practical, safe, and clear.

FAQs

What is the triglyceride glucose index?

It is a calculated marker using fasting triglycerides and fasting glucose. Researchers use it to explore insulin resistance and metabolic risk patterns. It is not a stand-alone diagnosis.

Which unit should I choose?

Choose the unit printed on your lab report. Use mg/dL for common United States reports. Use mmol/L where that format is standard. The calculator converts mmol/L before calculation.

Why are there two formula modes?

Published studies vary in where they place the division by two. The common scale gives values near eight to ten. The corrected scale gives lower values near four to five.

Can this diagnose insulin resistance?

No. It can support screening and trend review. Diagnosis needs medical evaluation, symptoms, history, and other tests. Always discuss concerning results with a qualified clinician.

Do I need fasting values?

Fasting values are preferred. Nonfasting triglycerides or glucose may shift the result. Enter the fasting hours to document the sample context in the report.

What are TyG BMI and TyG waist products?

They combine the TyG result with body size measures. Some studies evaluate these combined markers. They are optional and should be interpreted only with proper clinical context.

Why can I edit reference limits?

Cutoffs differ by study, population, formula, and clinical goal. Editable limits let you match the calculator to the reference source used in your work.

What should I do with a high result?

Review it with a clinician, especially when glucose, triglycerides, blood pressure, waist size, or HbA1c are also abnormal. Do not change treatment based only on this calculator.