Reverse BMI Calculator: Work Out Your Goal Weight in Seconds
Use this guide to learn what a reverse BMI calculator is, why it matters, and how to turn your target BMI into a clear, trackable weight goal.
1. What is a reverse BMI calculator?
A normal BMI tool asks, “Given my height and weight, what’s my BMI?” A reverse BMI calculator flips the question:
“If I’m this tall and want a BMI of X, what weight should I be?”
People search for it using phrases like BMI calculator reverse, BMI reverse calculation, BMI reverse calculator and reverse calculate BMI. All point to the same idea—start with a target BMI, end with a goal weight.
2. Why calculate weight from BMI?
- Clear targets. Ten pounds looks different on a 5′0″ body than on a 6′2″ frame. Reverse BMI ties the goal to your stature.
- Doctor‑friendly numbers. Many clinics use BMI bands. Speaking their language streamlines follow‑ups.
- Motivation. Watching the gap close between your current and goal weight provides a concrete scoreboard.
- Safety check. If the goal weight is far below the healthy range, you’ll know to seek professional advice.
3. How the reverse BMI calculator works
3.1 Flexible height inputs
Choose centimetres, inches, or feet + inches. The form hides unused boxes automatically.
3.2 Target BMI field
Enter any value between 10 and 50. Most people pick something in the 18.5 – 30 band.
3.3 Instant error checks
Out‑of‑range heights or BMIs trigger red error messages, ensuring clean data.
3.4 Core formula
Weight (kg) = Target BMI × Height² (m)The script also converts kilograms to pounds for convenience.
3.5 Healthy range & advice
It shows the healthy weight span (BMI 18.5 – 24.9) and prints a short recommendation based on your category.
3.6 Optional resources
Get useful recommendation for your weight‑gain plans, weight‑loss guides or balanced‑diet tips.
3.7 PDF export
A one‑click button saves a PDF report — perfect for coaches or personal records.
4. Step‑by‑step instructions
- Select your height unit (cm, inches, or ft/in).
- Enter your height.
- Type your target BMI (e.g., 22).
- Click Calculate.
- Read the report: goal weight, healthy range & advice.
- Press Export PDF if you want a printable copy.
- Hit Reset anytime to start over.
5. Reading your report
Example: Height 170 cm, target BMI 22.
- Goal weight: 63.6 kg (140.2 lb)
- Category: Normal
- Healthy range: 53.5 – 72.0 kg
- Advice: Maintain balanced food and regular activity.
You’ll also see quick links to the recommended resources for weight‑gain or weight‑loss.
6. Real‑world use cases
| Who | Why the reverse BMI tool helps |
|---|---|
| General dieter | Sets a height‑specific weight goal instead of a random “lose 10 lb.” |
| Doctor/dietitian | Prints a PDF target weight for patient files. |
| Fitness coach | Plans bulks or cuts anchored to BMI milestones. |
| Parents | Ensures a teen’s growth target stays in a safe range. |
| Researchers | Generates hypothetical weights for population studies. |
7. Benefits and limitations
7.1 Key benefits
- Speed: answer in under ten seconds.
- Multi‑unit support: no manual conversions.
- Healthy‑range check: extra safety layer.
- One‑click PDF: easy sharing and tracking.
7.2 Limitations
- BMI blind spots: can’t tell muscle from fat.
- Individual factors: bone density, ethnicity, age all matter.
- Not diagnostic: use results as a guide, not a verdict.
8. FAQs
Is the reverse BMI calculator accurate?
Mathematically, yes. Accuracy depends on precise height entry and a realistic BMI target.
Can I use it for children?
Pediatric growth charts differ. Consult a pediatrician for child assessments.
My BMI goal is 25 but the range calls it “overweight.” Why?
BMI 25 is the upper edge of normal. Aim for 24 or 23 if you want extra buffer.
Fastest way to hit the goal weight?
Safe progress is 0.5–1 % of body weight per week. Crash diets often backfire.
Does this replace a doctor?
No. It’s a handy guide, not a medical diagnosis.
9. Key takeaways
A reverse BMI calculator converts a desired BMI into a precise weight goal tied to your height. Use the number as a starting point, then layer in body‑composition checks, lifestyle tweaks, and professional advice for a complete plan.
Ready to try? Scroll up to the calculator, enter your height and dream BMI, and get your personalized target weight in seconds.