Fatty Liver Risk Calculator | Fatty Liver Index FLI

Q: What triglyceride unit should I use?

Select the unit shown on your report — mg/dL or mmol/L. This calculator automatically converts mmol/L to mg/dL for the formula. Sri Lankan labs commonly use mg/dL but always check your report.

Q: Can I have fatty liver with a low FLI score?

A low score makes fatty liver less likely but does not rule it out completely. Some people with lean or normal-weight fatty liver may have a lower FLI. If you have abnormal liver tests or risk factors, discuss with your doctor even if the score is low.

🔬 What does this tool do?

This tool estimates the likelihood of fatty liver using the validated Fatty Liver Index — FLI.

Fatty liver means excess fat has built up inside the liver. It is commonly linked with obesity, diabetes, high triglycerides and metabolic syndrome.

This calculator does not diagnose fatty liver. It helps identify whether your result is low, intermediate or high likelihood — so you know whether further assessment may be needed.

You will need four things from your reports:

Height and weight — to calculate BMI
Waist circumference in centimetres
Triglycerides from your lipid profile or blood test
GGT from your liver profile or LFT report

SuitabilityMeasurementsYour Result

Before you use this tool

Please confirm whether any of the following situations apply. They may affect the interpretation of your result.

Do any of the following apply to you?

These conditions can affect triglycerides, GGT or liver test interpretation.

I drink alcohol heavily or recently had heavy alcohol intake I have known hepatitis B or hepatitis C I already have diagnosed cirrhosis I am pregnant I recently had a severe illness None of the above

Enter your measurements and blood test values

Enter the number only for each value. Do not include the unit unless a unit selector is provided.

Height (cm)

Enter your height in centimetres. Example: if you are 165 cm tall, enter 165.

Please enter a valid height in cm.

Weight (kg)

Enter your weight in kilograms.

Please enter a valid weight in kg.

How to measure waist circumference

Stand upright and relax. Measure around the abdomen at the level of the belly button. Do not pull the tape too tight. Record the measurement in centimetres.

Waist circumference (cm)

Please enter a valid waist circumference in cm.

Where to find Triglycerides

Found in your lipid profile or individual triglyceride blood test. May be written as Triglycerides or TG. Enter the number and select the correct unit from your report.

Triglycerides

mg/dL mmol/L

Please enter a valid triglyceride value.

Where to find GGT

Found in your liver profile or LFT report. May be written as GGT, Gamma GT, or Gamma-glutamyl transferase. Enter the value in U/L.

GGT (U/L)

Please enter a valid GGT value.

Your Fatty Liver Risk Result

Values You Entered

Fatty Liver Index (FLI) Score — 0 to 100

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This tool is not for emergencies

If you have severe abdominal pain, yellowing of the skin or eyes (jaundice), vomiting blood or black stools — do not use this calculator. Seek emergency medical care immediately.

⚠️ Medical Disclaimer

This tool provides educational information only. It does not diagnose fatty liver, hepatitis, cirrhosis or liver cancer. All results must be interpreted by a doctor.

Understanding the Fatty Liver Index (FLI)

The Fatty Liver Index is a validated, simple score that estimates the likelihood of fatty liver using four routine measurements. Here is what the score means and how it is used.

What is fatty liver?

Fatty liver, also called hepatic steatosis or NAFLD (non-alcoholic fatty liver disease), occurs when too much fat builds up inside the liver. It is closely linked with obesity, type 2 diabetes, insulin resistance, high triglycerides and metabolic syndrome. In early stages, fatty liver may cause no symptoms. Over time it can progress to liver inflammation, fibrosis (scarring) and cirrhosis.

What is the Fatty Liver Index (FLI)?

The Fatty Liver Index is a validated mathematical score using BMI, waist circumference, triglycerides and GGT. It produces a score from 0 to 100. A score below 30 helps rule out fatty liver, while 60 or above suggests a higher likelihood. The FLI is widely used as a non-invasive screening tool because it requires only routine measurements — no ultrasound or biopsy is needed.

FLI score interpretation

FLI Score	Category	What it suggests
Less than 30	Low likelihood	Fatty liver is less likely based on these values. Maintain a healthy lifestyle and monitor risk factors.
30 to 59	Intermediate likelihood	Result is not clearly low or high. Fatty liver may be possible. Medical review may be useful.
60 or above	High likelihood	Higher likelihood of fatty liver. Medical review and further assessment are recommended.

What should I do if my result is high or intermediate?

A high or intermediate FLI does not confirm a diagnosis of fatty liver. It suggests that further evaluation may be helpful. This may include a liver ultrasound, liver profile blood tests, blood glucose and HbA1c tests, and cardiovascular risk assessment. If fatty liver is confirmed, treatment focuses on weight reduction, diet improvement, physical activity, and management of diabetes and high triglycerides.

Why does GGT affect the score?

GGT (gamma-glutamyl transferase) is a liver enzyme that is often elevated in fatty liver disease. It is sensitive to liver fat, alcohol use and bile duct problems. The FLI uses GGT as a marker because it is a reliable indicator of metabolic liver stress. However, GGT alone is not specific — it can also rise due to alcohol, certain medications and other liver conditions.

Related tools and guides

Frequently Asked Questions

Common questions about fatty liver and the FLI score, answered by Sineth Hospitals.

What is the Fatty Liver Index (FLI)? ▼

The Fatty Liver Index is a validated score that estimates the likelihood of fatty liver without needing an ultrasound or liver biopsy. It uses four routine values — BMI, waist circumference, triglycerides and GGT — to calculate a score from 0 to 100. A score below 30 helps rule out fatty liver, while 60 or above suggests a higher likelihood.

Does this tool diagnose fatty liver? ▼

No. This calculator estimates the likelihood of fatty liver. It does not provide a confirmed diagnosis. Fatty liver is usually diagnosed by liver ultrasound or imaging. A doctor must interpret any abnormal result and arrange appropriate tests.

Where do I find triglycerides and GGT in my reports? ▼

Triglycerides are found in a lipid profile or individual triglyceride blood test — written as Triglycerides or TG. GGT is found in a liver profile or LFT report — written as GGT, Gamma GT or Gamma-glutamyl transferase. Enter the number and select the correct unit shown on your report.

What triglyceride unit should I use — mg/dL or mmol/L? ▼

Choose the unit shown on your blood test report. Sri Lankan laboratories commonly report triglycerides in mg/dL, but some use mmol/L. Check the unit label next to the triglyceride value in your report. This calculator automatically converts mmol/L to mg/dL for the formula.

Can I have fatty liver even with a low FLI score? ▼

A low FLI score makes fatty liver less likely but does not rule it out completely. Some people with lean or normal-weight fatty liver may have a lower FLI. If you have abnormal liver tests, symptoms or significant risk factors, discuss with your doctor even if the FLI score is low.

Does alcohol affect this calculator? ▼

Yes. GGT levels are often raised by alcohol use, which can increase the FLI score even without metabolic fatty liver. This calculator estimates overall fatty liver likelihood but cannot distinguish between metabolic fatty liver (NAFLD) and alcohol-related liver disease (ALD). If you drink alcohol significantly, medical assessment is recommended.

What is the next step if my result is high? ▼

A high FLI suggests a higher likelihood of fatty liver and warrants medical review. Your doctor may arrange a liver ultrasound, liver profile, lipid panel, blood glucose and HbA1c tests. If fatty liver is confirmed, management focuses on weight reduction, a healthy diet, regular physical activity and treatment of related conditions such as diabetes and high triglycerides.