Height & Weight Calculator

Navigating between metric (centimetres, metres, kilograms) and imperial (feet, inches, pounds, stones) body measurements is a common hurdle in medical

Health & Fitness

Conversion Direction & Input Units

Select input format to perform bidirectional anatomical conversion

Height

Height value (cm for metric input, total inches for imperial input)

Body Weight

Weight value (kg for metric input, pounds for imperial input)

Age (Years — Reference Context)

Used for secondary contextual screening ratios

Formula & Methodology

Height: 1 in = 2.54 cm; 1 ft = 12 in = 30.48 cm | Weight: 1 lb = 0.45359237 kg; 1 stone = 14 lb = 6.35029318 kg

All calculations apply the international treaty definitions established in the 1959 International Yard and Pound Agreement. Metric heights are converted to total inches by dividing by 2.54, then separated into whole feet and residual inches. Kilograms are converted to pounds using the exact reciprocal factor, and stones are evaluated at 14 pounds per stone.

Bidirectional Body Measurement Conversion (Metric → Imperial)

5 ft 8.9 in | 154.3 lb (11 st 0.3 lb) Converted

Overview

Navigating between metric (centimetres, metres, kilograms) and imperial (feet, inches, pounds, stones) body measurements is a common hurdle in medical records, fitness apps, travel visas, and international sports standards. The Height & Weight Calculator is a specialized anatomical converter that delivers exact bidirectional conversions across all global measurement conventions, while computing secondary reference screening indices like BMI and BSA.

Educational & Safety Disclaimer: This tool performs physical unit conversions and reference screening estimations. It is not medical advice, does not provide clinical diagnosis, and does not replace professional medical evaluations.

Worked Examples

Convert 175 cm and 70 kg to Imperial Units

Metric: Height = 175 cm, Weight = 70 kg.

Convert height to inches: 175 ÷ 2.54 = 68.8976 in.
Compute feet and inches: 68.8976 ÷ 12 = 5 feet with 8.8976 in remaining → 5 ft 8.9 in.
Convert weight to pounds: 70 ÷ 0.45359237 = 154.3236 lb → 154.3 lb.
Convert pounds to stones: 154.3236 ÷ 14 = 11 stones with 0.32 lb remaining → 11 st 0.3 lb.

Final Answer: 5 ft 8.9 in | 154.3 lb (11 st 0.3 lb)

Convert 68 in (5 ft 8 in) and 160 lb to Metric Units

Imperial: Height = 68 in, Weight = 160 lb.

Convert height to cm: 68 × 2.54 = 172.72 cm (1.73 m).
Convert weight to kg: 160 × 0.45359237 = 72.5748 kg → 72.6 kg.
Secondary BMI: 72.5748 ÷ (1.7272²) = 24.3 kg/m².

Final Answer: 172.7 cm (1.73 m) | 72.6 kg

Stone to Kilogram Verification: 12 stone to kg

Weight = 12 stone (168 lb).

Pounds: 12 × 14 = 168 lb.
Kilograms: 168 × 0.45359237 = 76.2035 kg → 76.2 kg.

Final Answer: 76.2 kg

How to Use This Calculator

Select your conversion mode (Metric to Imperial or Imperial to Metric).

Enter your height (in cm or total inches) and weight (in kg or pounds).

Instantly read your converted values in feet, inches, pounds, stones, and metric units.

Review secondary contextual health indices including BMI and Body Surface Area.

Frequently Asked Questions

How do I convert feet and inches into total inches for this calculator?

Multiply your height in feet by 12 and add the remaining inches. For example, 5 feet 10 inches is (5 × 12) + 10 = 60 + 10 = 70 inches.

What is a "stone" in British body weight measurements?

The stone (st) is an official imperial unit of mass equal to exactly 14 pounds (approximately 6.3503 kilograms). It remains widely used in the United Kingdom and Republic of Ireland for informal human body weight.

Why are exact conversion constants important in health metrics?

Approximating 1 pound as 0.45 kg or 1 inch as 2.5 cm introduces compounding errors when squaring height for BMI calculations or evaluating Body Surface Area. Using exact international treaty constants (2.54 cm and 0.45359237 kg) guarantees computational accuracy.

How does this tool differ from the BMI Calculator?

The BMI Calculator focuses specifically on population weight-to-height screening classifications and healthy weight ranges. This Height & Weight Calculator is primarily an anatomical unit converter designed to translate physical measurements seamlessly between global formats, with BMI displayed only as secondary reference context.

Are human heights measured in the morning taller than in the evening?

Yes. Due to gravitational compression of the intervertebral discs in the spine throughout the day, an adult is typically 1 to 2 centimetres (0.4 to 0.8 inches) taller immediately upon waking than in the evening.