There are numerous formulas that calculate the impact of your health status and lifestyle choices.
The most common include:
BMI calculator for adults
BMI calculator for children and teens
Waist-to-hip ratio
Depression scale
Geriatric Depression Scale Printable survey
Stress estimator
Ovulation and due date tracker
Framingham Score Predicts 10 year chance of heart disease
There are more calculators available. Some will have duplications.
Health calculators from US government site.
University of Maryland Medical System site.