Health
Height Calculator
Pick a mode. In convert mode, enter your height in any common unit and the calculator returns all the others. In mid-parental mode, enter the parents' heights to estimate the child's adult height.
Mode
Unit
Disclaimer
The mid-parental height method (Tanner) is a rough estimate. Real adult height also depends on nutrition, health, and individual growth patterns. The estimate has a 95% range of roughly ±4 inches around the predicted value.
Educational tool. Not medical advice. For pediatric growth tracking and concerns, consult a pediatrician.
Height
5 ft 10 in
177.8 cm; 1.778 m; 70 in
1 inch = 2.54 cm exactly. Mid-parental height formula: for boys (mother + father + 5 in) / 2; for girls (mother + father − 5 in) / 2.
Examples
5 ft 10 in
= 70 in = 177.80 cm = 1.778 m
175 cm
≈ 5 ft 8.9 in = 68.90 in
Boy: mother 5 ft 4 in, father 6 ft 0 in
≈ 5 ft 10.5 in
Girl: mother 5 ft 6 in, father 5 ft 11 in
≈ 5 ft 4 in
How it works
Height conversion uses the exact conversion 1 in = 2.54 cm. Mid-parental height uses the standard Tanner formula with a 5-inch sex adjustment.
Boy · (mom + dad + 5 in) / 2
Girl · (mom + dad − 5 in) / 2
Related health calculators
- BMI calculator for body-mass index from height and weight.
- Ideal weight calculator for a healthy-weight range at a given height.
- Lean body mass calculator for body composition estimates that depend on height.
- Length converter for general distance conversions outside the body-height context.
- All health calculators.
Frequently asked questions
1 inch is exactly 2.54 cm. So 5 ft 10 in = 70 in × 2.54 = 177.80 cm. The calculator does this for every common unit pair.
For boys, predicted adult height = (mother's height + father's height + 5 in) / 2. For girls, predicted adult height = (mother's height + father's height − 5 in) / 2. The 5-inch adjustment captures the average difference between adult male and female heights.
The mid-parental method has a 95% confidence range of about ±4 inches around the predicted value. Individual outcomes depend on nutrition, health, and timing of growth spurts.
The mid-parental estimate is for predicted adult height. It works best when both parents' final adult heights are known. For tracking a growing child's percentile, a pediatrician uses growth charts (CDC or WHO), which this calculator does not include.
No. The calculator is an educational tool. For pediatric growth concerns or short stature evaluation, consult a pediatrician who can use growth charts and bone-age imaging.
Related calculators
Health
TDEE Calculator
Estimate your Total Daily Energy Expenditure from sex, age, height, weight, and activity — with maintenance, cut, and bulk targets.
Health
BMI Calculator
Compute Body Mass Index from height and weight, with the standard category scale and the healthy weight range for your height.
Health
BMR Calculator
Estimate your Basal Metabolic Rate — the calories your body burns at rest — using the Mifflin–St Jeor equation.