Fracture Risk Calculator

Last updated: August 9, 2026 • Reviewed by the editorial team • Health Calculators • ~14 min read

⚠ Medical disclaimer: This calculator is for general information and education only. It is not medical advice, diagnosis or treatment, and should not be used to replace the judgement of a doctor or other qualified health professional. Results are estimates based on standard formulas and may not apply to your individual circumstances — especially if you are pregnant, under 18, managing a medical condition, or taking medication. Always consult a healthcare professional before making decisions about your health, diet or exercise.

The Fracture Risk Calculator gives a simplified estimate of 10-year fracture risk from common risk factors used in tools like FRAX. Enter age, sex, weight, height, prior fracture, family history and smoking and press Calculate to get an estimated 10-year major fracture risk percentage and category instantly, privately and free.

Fracture Risk Calculator at a Glance

What it does: gives a simplified estimate of 10-year fracture risk from common risk factors used in tools like FRAX.
How long it takes: Under a second — the math runs on your device.
Cost: Nothing — free forever, no sign-up.
Where it works: Any browser — phone, tablet, laptop or desktop.

What Is the Fracture Risk Calculator?

The Fracture Risk Calculator is a free, browser-based health tool that gives a simplified estimate of 10-year fracture risk from common risk factors used in tools like FRAX. It is built for the moment you need a dependable answer without spreadsheets, sign-ups or apps.

You enter age, sex, weight, height, prior fracture, family history and smoking and the calculator returns an estimated 10-year major fracture risk percentage and category instantly. Everything runs on your own device, so the numbers you type never leave your browser.

The method is shown on the page so you can trust the result, and there are no ads, accounts or limits to get in the way.

How to Use the Fracture Risk Calculator

Using the tool takes only a few seconds. Here is the routine, step by step:

Enter the required values in the labelled fields.
Press Calculate.
Read your result instantly.
Use Clear to run another calculation.

If a value is missing or outside a sensible range, the form shows a short message instead of returning a misleading result.

How the Fracture Risk Calculator Works: Formula and Method

Fracture risk rises with age, low body weight, prior fracture, a parent with a hip fracture, smoking and certain medications. Tools like FRAX combine these factors to estimate the chance of a major fracture over 10 years.

This is a simplified educational version that weights common factors; it is not the official FRAX tool and does not include bone mineral density or all clinical variables.

Use it as a prompt to discuss bone health with a doctor, who can consider DXA scanning, diet, exercise and treatment.

Risk is estimated by weighting age, low BMI, prior fracture, family history and smoking

Worked Example with the Fracture Risk Calculator

A worked example makes the method concrete, so let us run through one:

A 65-year-old woman with a BMI of 19 who smokes and whose mother broke a hip.
Each risk factor adds to the estimate.
The result may show moderate or higher risk.
That's a good reason to discuss bone health and screening with a clinician.

Now swap in your own numbers. The same steps produce an instant result tailored to the values you enter.

When Should You Use the Fracture Risk Calculator?

Here are the everyday situations where this tool earns its place:

Understanding bone health. See how age and lifestyle affect fracture risk.
Preparing for a check-up. Ask about bone density testing if risk factors are present.
Motivating prevention. Weight-bearing exercise, calcium, vitamin D and not smoking help.
Education. Learn the factors behind tools like FRAX.

Common Mistakes to Avoid With the Fracture Risk Calculator

Most people who stumble with this calculator make the same handful of slips. None are hard to avoid once you know them:

Treating it as official FRAX. It is a simplified estimate; clinicians use the validated tool with more data.
Ignoring bone density. A DXA scan gives important information this calculator lacks.
Self-medicating calcium/vitamin D. Follow medical advice, especially with other conditions.
Assuming low risk means no action. Diet and exercise matter at every age.
Delaying care after a fracture. A broken bone after a minor fall may signal osteoporosis.

Who Is the Fracture Risk Calculator For?

The Fracture Risk Calculator is for anyone who wants a fast, reliable answer for everyday health and fitness planning — from people managing their own wellbeing to students, coaches and professionals needing a quick reference.

There is no minimum skill level. Every field is labelled, the formula is shown in plain language, and a worked example walks you through the maths.

Why the Fracture Risk Calculator Matters

Health calculators are useful because they turn vague worries or goals into concrete numbers you can act on. A clear result removes guesswork, helps you compare options, and gives you a starting point for a conversation with a professional. The Fracture Risk Calculator is designed to be fast and private, so you can explore scenarios — different values, different goals — without sharing personal information or signing up for anything.

Numbers also create accountability. When you can measure something, you can track it over time, which is one of the reasons calculators are so often used in coaching, self-care and clinical waiting rooms. The aim is not perfection, but awareness: a realistic sense of where you stand and what a sensible next step looks like.

The Science and Limits Behind the Fracture Risk Calculator

Every formula used on this page is a model — a simplified description of how the body tends to work across large groups of people. Models are useful because they produce consistent estimates quickly, but they cannot capture everything about you as an individual. Genetics, medications, fitness, ethnicity, pregnancy, stress and sleep can all change what a number means in real life.

That is why we show the formula, explain the assumptions and describe the limitations plainly. Use the result as a strong starting point, not as a final truth. The most reliable decisions combine a calculator with your own observations, trends over time and, when it matters, the judgement of a qualified healthcare professional.

Getting the Most Accurate Result

A calculator is only as good as its inputs. Use measured values rather than guesses where you can: weigh yourself on a reliable scale, use a tape measure correctly, read recent lab results directly, and choose the units that match what you actually have. Entering honest, current numbers makes a surprising difference to how useful the output is.

It is also worth running the calculation more than once under similar conditions. Single readings can be skewed by hydration, time of day, stress or a recent meal. A pattern across several days or weeks tells you far more than any one result, and it is the pattern that professionals care about most.

How We Verify the Fracture Risk Calculator

Every calculator on this site uses a recognised, widely accepted formula and is tested against known worked examples before publication. We re-review pages when guidance changes and note the update date at the top.

If a reader reports something that looks off, we reproduce the calculation and correct it if needed rather than defend an error.

Questions People Also Ask About the Fracture Risk Calculator

These are the conversational, intent-based questions people ask search engines and AI assistants about fracture risk calculator — each answered directly so it can appear in an AI Overview or featured snippet.