Overview
BMI is weight divided by height squared (kg/m²). It is useful for population trends but misses muscle mass and fat distribution.
How to use this calculator
Adjust inputs to mirror your real-world cadence. The calculator applies standard formulas described in the Formula section—always verify critical figures independently.
Formula and methodology
Outputs derive from established formulas implemented in code for repeatability. Units must stay consistent across fields.
When to use this calculator
Planning
Estimate outcomes before negotiating or committing.
Comparison
Contrast two interest rates or terms side by side.
Education
Build amortisation intuition with transparent formulas.
Common mistakes
Unit mismatch
Mixing monthly payments with annual rates without aligning periods.
Per cent vs decimal
Entering 6 instead of 0.06 when the field expects decimal form.
Ignoring fees
Forgetting taxes, insurance, or fees that change net cash flows.
Key terms
BMI
Body mass index—kilograms divided by metres squared.
Underweight/overweight thresholds
WHO-style categories vary for children and athletes.
Screening tool
Not diagnostic on its own.
Waist circumference
Often complements BMI for cardiometabolic risk.
References and further reading
Related calculators
FAQ
Professional advice?
Why results differ elsewhere?
Regulated medical or legal use?
Currency?
Taxes?
Precision?
Children vs adults?
Can I embed assumptions?
Results are estimates for educational purposes and may not match your exact situation.