What's your waist-to-height ratio?™
One number — your waist measured against your height — tells you more about your metabolic health than the bathroom scale ever will. All you need is a tape measure.
Check your number
This is a screening number, not a diagnosis — it's worth bringing to your doctor.
Why this one number matters
Why your waist?
The fat that matters most for metabolic health is the deep belly fat around your organs — it's closely tied to insulin resistance, rising blood sugar, and blood pressure. And it shows up first at your waistline. Your waist tells the same story as your labs.
Why not the scale — or BMI?
Two people can weigh exactly the same and carry it in completely different places. The scale can't see where fat sits, and neither can BMI. Waist-to-height can — which is why health researchers have moved toward it.
Why 0.5?
The rule of thumb used in public-health guidance — including the UK's national health guidelines — is simple: keep your waist under half your height. One threshold, every height, checked with a $2 tape measure.
The number moves when the fat behind it does
Waist-to-height ratio tracks deep belly fat — and deep belly fat responds to how you eat. That's why the tape measure moves in weeks, while lab work takes months to catch up.
If your number is above 0.5, the fix isn't willpower, and it isn't another app. It's food.
Start moving your number →From GFit Nutrition — home of the 28-Day Metabolic Reset. Food-based, with no counting or tracking.