Ketones in Urine Test

A ketones in urine test measures the level of ketones in your urine. High levels may be a sign of ketoacidosis, a serious condition that needs immediate medical attention.

What this test measures

This test measures ketone levels in your urine. Ketones are acids produced when your body breaks down fat for energy instead of glucose.

What your results mean

Reference ranges vary by laboratory and by your age and sex. MedlinePlus does not publish a single normal range for this test — always read your result against the range printed on your own lab report and discuss it with your provider.

Higher-than-normal results

High ketone levels in urine may mean your blood is too acidic (ketoacidosis). This is a medical emergency, especially in people with diabetes.

Frequently asked questions

What are ketones?

Ketones are acids produced when your body breaks down fat for energy instead of glucose.

Why is this test done?

It helps monitor people at risk for high ketone levels, such as those with diabetes, to catch ketoacidosis early.

What is diabetic ketoacidosis (DKA)?

DKA is a life-threatening condition caused by high ketone levels. It is most common in type 1 diabetes but can also occur in type 2.

Can a keto diet cause high ketones?

Yes, eating a low-carbohydrate keto diet can cause your body to produce ketones.

How are results reported?

Results may be a specific number or listed as small, moderate, or large amounts of ketones.

Sources

MedlinePlus: Ketones in Urine — NIH MedlinePlus

Last updated July 7, 2026. Information is aggregated from official public sources and is not a substitute for professional medical care.