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How to Use LDL Cholesterol Calculator (Friedewald Equation) Online for Free: Step-by-Step Guide

Calculate LDL cholesterol from total cholesterol, HDL and triglycerides. Free, private and no sign-up.

Saizul Amin
Saizul Amin17 Oct 2026 · Updated 22 Oct 2026 · 3 min read
How to Use LDL Cholesterol Calculator (Friedewald Equation) Online for Free: Step-by-Step Guide

How to Use LDL Cholesterol Calculator (Friedewald Equation) Online for Free

Calculate LDL cholesterol from total cholesterol, HDL and triglycerides. This guide shows what LDL Cholesterol Calculator (Friedewald Equation) does, how to use it step by step, what to watch out for, and which related tools on shobfree.com can help next.

Quick answer

Open LDL Cholesterol Calculator (Friedewald Equation), type your numbers or pick the options you need, check the result that appears, and then use it. LDL Cholesterol Calculator (Friedewald Equation) is free, needs no account and runs in your browser, so what you type or add stays on your device.

What LDL Cholesterol Calculator (Friedewald Equation) does

  • Calculate LDL cholesterol from total cholesterol, HDL and triglycerides.
  • Enter total cholesterol, HDL cholesterol and triglycerides in mg/dL.
  • The calculator estimates LDL with the Friedewald equation and also shows VLDL, non-HDL cholesterol and the total/HDL ratio.

Enter total cholesterol, HDL cholesterol and triglycerides in mg/dL. The calculator estimates LDL with the Friedewald equation and also shows VLDL, non-HDL cholesterol and the total/HDL ratio.

How to use LDL Cholesterol Calculator (Friedewald Equation), step by step

  1. Fill in the boxes. Type your numbers or pick the options you need.
  2. See the result. The answer updates right away as you change a value.
  3. Use it. Copy the result or note it down. Nothing is sent anywhere.

These three steps are the same on a phone and on a computer. If something looks wrong, change one setting and look at the result again; LDL Cholesterol Calculator (Friedewald Equation) updates as you go.

A worked example

Total 200, HDL 50 and triglycerides 150 mg/dL give a VLDL of 30 and an LDL of 120 mg/dL, with a non-HDL cholesterol of 150.

Tips for a good result

  • Run a best case and a worst case, then keep both numbers for your planning.
  • Change one value at a time, so you can see which input moves the result.
  • Double-check the units and the currency or period before you trust a number.
  • Treat the result as an estimate and confirm important figures with the official source.

Who is this for?

LDL Cholesterol Calculator (Friedewald Equation) is useful for anyone who needs calculate LDL cholesterol from total cholesterol, HDL and triglycerides without installing software or paying for a subscription. Students, freelancers, office staff and small-business owners use tools like this for quick, one-off jobs where a full application would be too much.

Frequently asked questions

Why not valid above 400?

The VLDL estimate becomes unreliable.

Which units?

mg/dL. Multiply mmol/L by 38.67 for cholesterol and 88.57 for triglycerides.

Should I fast?

Fasting is not always required today, but your lab and clinician decide.

What is a good LDL?

Targets depend on your risk; ask your clinician.

Do I need to create an account to use LDL Cholesterol Calculator (Friedewald Equation)?

No. Open the page and start. There is no sign-up, no email and no payment.

Can I use LDL Cholesterol Calculator (Friedewald Equation) on my phone?

Yes. The page adapts to small screens, and everything runs in your phone's browser, so the same steps work on a laptop or a phone.

Privacy

LDL Cholesterol Calculator (Friedewald Equation) works inside your browser. Your files, text and numbers are not uploaded to a server, and there is nothing to delete afterwards.

Completely freeNo cost, no sign-up
Files stay privateEverything runs in your browser
Easy in your languageAvailable in many languages