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Body surface area calculator

Body surface area (BSA) in m² from height and weight by the Mosteller, DuBois and Haycock formulas, with the spread between them.

更新于 已验证的示例：4

Accepts 5'11" or 5 ft 11 in
试一试
BSA (Mosteller)
m²
BSA (Mosteller): 1.84 m²
小数位数：2；取最近值，等距时取偶数末位
BSA (DuBois)
1.85m²
BSA (Haycock)
1.85m²
Spread between formulas
0.2%

Your body surface area is about 1.84 m² by Mosteller; DuBois gives 1.85 m² and Haycock 1.85 m², a spread of 0.2 %.

Body surface area by formula (m²)

Mosteller1.84 m²DuBois1.85 m²Haycock1.85 m²
计算方法 S

  1. Height in centimetres, weight in kilograms

    h=175 cm,w=70 kgh = 175\ \text{cm},\quad w = 70\ \text{kg}

  2. Mosteller (1987)

    175×703600=1.8447 m2\sqrt{\frac{175 \times 70}{3600}} = 1.8447\ \text{m}^2

  3. DuBois (1916)

    0.007184×700.425×1750.725=1.8481 m20.007184 \times 70^{0.425} \times 175^{0.725} = 1.8481\ \text{m}^2

  4. Haycock (1978)

    0.024265×700.5378×1750.3964=1.8468 m20.024265 \times 70^{0.5378} \times 175^{0.3964} = 1.8468\ \text{m}^2

关于Body surface area calculator

Body surface area (BSA) is the total area of the skin, estimated here from height and weight with three formulas. Mosteller (1987) takes the square root of height in centimetres times weight in kilograms divided by 3600. DuBois (1916) and Haycock (1978) raise weight and height to fitted powers. The spread shows how far the three disagree.

Many chemotherapy drugs are dosed in mg per m², cardiac output is divided by BSA to give cardiac index, and kidney function (eGFR) is reported per 1.73 m². At the default 70 kg and 175 cm, Mosteller gives 1.84 m², and DuBois and Haycock both round to 1.85 m².

For adults of average build the formulas agree within about 1.5 %, but they drift apart in obesity: at 120 kg and 170 cm they range from 2.28 to 2.44 m². Dosing protocols state which formula their doses assume.

计算示例

70 kg, 175 cm

Weight
70 kg
高度
175 cm
BSA (Mosteller)
1.84 m²
BSA (DuBois)
1.85 m²
BSA (Haycock)
1.85 m²

核验来源：Python 3.8 math: √(175 × 70 / 3600) = 1.844662; 0.007184 × 70^0.425 × 175^0.725 = 1.848143; 0.024265 × 70^0.5378 × 175^0.3964 = 1.846776

200 lb, 6 ft

Weight
200 lb
高度
6 ft
BSA (Mosteller)
2.15 m²
BSA (DuBois)
2.13 m²
BSA (Haycock)
2.16 m²

核验来源：Python 3.8 math with 90.718474 kg and 182.88 cm: 2.146741, 2.130382, 2.160487

Child 10 kg, 75 cm

Weight
10 kg
高度
75 cm
BSA (Mosteller)
0.46 m²
BSA (DuBois)
0.44 m²
BSA (Haycock)
0.46 m²

核验来源：Python 3.8 math: 0.456435, 0.437306, 0.463505

Edge: newborn 3.5 kg, 50 cm

Weight
3.5 kg
高度
50 cm
BSA (Mosteller)
0.22 m²
BSA (DuBois)
0.21 m²
BSA (Haycock)
0.22 m²

核验来源：Python 3.8 math: 0.220479, 0.208616, 0.224415

常见问题

What is the average body surface area of an adult?

About 1.8 m². In 3,613 UK adults receiving chemotherapy in 2005, Sacco and colleagues (PLoS One 2010) found a mean of 1.79 m²: 1.91 m² for men and 1.71 m² for women. eGFR is normalised to a reference adult of 1.73 m², so a person with a BSA of 2.1 m² has an absolute kidney filtration rate about 21 % higher than the reported eGFR.

What is the Mosteller formula?

BSA in m² equals the square root of height in centimetres times weight in kilograms, divided by 3600. For 175 cm and 70 kg that is √(175 × 70 ÷ 3600) = √3.40 = 1.84 m². R. D. Mosteller published it in a 1987 letter to the New England Journal of Medicine as a simpler alternative to the DuBois formula that can be worked out on a pocket calculator.

Which BSA formula is best for children?

DuBois is the least suited to small children. Haycock and colleagues measured 81 subjects from premature infants to adults and found that the DuBois formula increasingly underestimated surface area below 0.7 m², by 7.96 % in newborns. For a 3.5 kg, 50 cm newborn, DuBois gives 0.209 m² against Haycock's 0.224 m² and Mosteller's 0.220 m². DuBois itself was fitted to only 9 people.

Why are chemotherapy doses based on body surface area?

Metabolic rate, blood volume and drug clearance were found to scale more closely with surface area than with weight across body sizes, so mg per m² became the standard way to scale cytotoxic doses. A 75 mg/m² dose for a 1.84 m² adult is 138 mg. BSA explains only part of the variation in clearance between patients, and some drugs, such as carboplatin, are dosed on kidney function instead.

“Body surface area calculator”有多准确？

准确性取决于输入值和方法的假设。十进制运算使用50位有效数字，但估算、数值方法和源数据的精度可能较低；显示时的舍入并不能消除这些限制。 已按独立来源核验的计算示例：4。 例如，“70 kg, 175 cm”根据Python 3.8 math: √(175 × 70 / 3600) = 1.844662; 0.007184 × 70^0.425 × 175^0.725 = 1.848143; 0.024265 × 70^0.5378 × 175^0.3964 = 1.846776进行核验。

这种方法出自哪里？

Mosteller RD. Simplified calculation of body-surface area. N Engl J Med 1987;317(17):1098; DuBois D, DuBois EF. A formula to estimate the approximate surface area if height and weight be known. Arch Intern Med 1916;17:863–871; Haycock GB, Schwartz GJ, Wisotsky DH. Geometric method for measuring body surface area: a height-weight formula validated in infants, children, and adults. J Pediatr 1978;93(1):62–66.

关于此计算器

Mosteller=h⋅w3600,DuBois=0.007184 w0.425h0.725,Haycock=0.024265 w0.5378h0.3964(h cm, w kg)\text{Mosteller} = \sqrt{\frac{h \cdot w}{3600}},\quad \text{DuBois} = 0.007184\, w^{0.425} h^{0.725},\quad \text{Haycock} = 0.024265\, w^{0.5378} h^{0.3964}\quad(h\ \text{cm},\ w\ \text{kg})

来源

  1. Mosteller RD. Simplified calculation of body-surface area. N Engl J Med 1987;317(17):1098
  2. DuBois D, DuBois EF. A formula to estimate the approximate surface area if height and weight be known. Arch Intern Med 1916;17:863–871
  3. Haycock GB, Schwartz GJ, Wisotsky DH. Geometric method for measuring body surface area: a height-weight formula validated in infants, children, and adults. J Pediatr 1978;93(1):62–66

仅供参考，不构成医疗建议。这些公式描述的是人群，并非您的个人情况；根据结果采取行动前，请咨询医务人员。

已对照来源验证

此计算器包含 4 个已解示例，答案来自独立来源。这些示例会在测试套件中运行，你也可以在此运行验证。

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