Estimate your child's future adult height using scientifically-backed formulas based on parental heights and gender. This height predictor calculator by Kalnut uses the mid-parental height method to provide accurate predictions for growth monitoring and health tracking. Whether you're tracking your child's development or curious about expected height, get instant results with clear explanations.
A height predictor calculator estimates a child's potential adult height based on genetic factors, primarily parental heights. Kalnut's calculator uses the mid-parental height formula, a scientifically validated method used by pediatricians and growth specialists worldwide. This tool helps parents monitor their child's growth trajectory and identify potential growth concerns early.
For Boys: [(Mother's Height + Father's Height + 13 cm) / 2] ± 8.5 cm
For Girls: [(Mother's Height + Father's Height - 13 cm) / 2] ± 8.5 cm
The ±8.5 cm represents the standard deviation, accounting for genetic variability.
| Factor | Impact | Description |
|---|---|---|
| Genetics | 60-80% | Primary determinant from parental heights |
| Nutrition | 10-20% | Adequate protein, vitamins, and minerals |
| Health | 5-10% | Chronic conditions can affect growth |
| Sleep & Exercise | 5-10% | Growth hormone release during sleep |
The CDC and WHO provide growth charts that plot a child's height against age and gender percentiles. While the mid-parental height formula predicts final adult height, tracking growth velocity on these charts helps identify if a child is following their expected growth curve. Kalnut recommends using both tools together for comprehensive growth monitoring.
Height prediction calculators provide estimates, not guarantees. Factors like nutrition deficiencies, hormonal imbalances, chronic illnesses, and genetic variations can cause actual height to differ from predictions. The mid-parental height formula has an accuracy range of ±8.5 cm (about ±3.3 inches) due to natural genetic variability. Kalnut's calculator is a screening tool and should not replace professional medical evaluation for growth concerns.
Height predictor calculators using the mid-parental height formula have an accuracy range of ±8.5 cm (±3.3 inches). About 68% of children will fall within this range, and 95% will be within ±17 cm of the prediction. Accuracy improves as children get older and closer to their adult height.
You can use the mid-parental height formula at any age, but predictions become more accurate after age 2 when infant growth patterns stabilize. For the most accurate predictions, wait until after puberty begins, as growth spurts can temporarily alter predictions. Kalnut's calculator works for children of all ages.
Yes, nutrition plays a significant role in whether a child reaches their genetic height potential. Adequate protein, calcium, vitamin D, and overall balanced nutrition support optimal growth. Malnutrition or chronic deficiencies can prevent children from reaching their predicted height, while optimal nutrition helps them achieve it.
Consult a pediatrician if your child's height is consistently below the 3rd percentile, if they stop growing or grow much slower than expected, or if their growth curve changes significantly. Other warning signs include very early or very late puberty. While Kalnut's height predictor is helpful for monitoring, professional evaluation is essential for growth concerns.
This height predictor calculator is provided by Kalnut for informational purposes. Always consult with healthcare professionals for personalized medical advice and growth monitoring.