九个月的孩子体重是8.5公斤，偏轻一点，每个人的发育是不一样的，这是没有影响的。

九个月的孩子体重是8.5公斤，偏轻一点，每个人的发育是不一样的，这是没有影响的。

身高推算公式：出生3个月增长3-3.5厘米/每月4-6个月增长2厘米/每月7-12个月增长1-1.5厘米/每月1周岁后身高=(年龄×5)+80厘米体重推算公式：1-6个月体重(克)=出生体重+(月龄×600克)7-12个月体重(克)=出生体重+(月龄×500克)2-14岁体重(公斤)=(年龄×2)+8公斤身高方面：数值分为下限，中限，上限三种，可以较仔细的对照。P15表示第15个孩子的指标（下限）P50表示第50孩子的指标（中位）P85表示第85个的指标（上限）身长/身高：（24个月以后站着量，之前躺着量）女孩男孩月P15P50P85//P15P50P85047.249.151.147.949.951.8151.753.755.752.754.756.7255.057.159.256.458.460.5357.659.862.059.361.463.5459.862.164.361.763.966.0561.764.066.363.765.968.1663.465.768.165.467.669.8764.967.369.766.969.271.4866.368.771.268.370.672.9967.670.172.669.672.074.31068.971.574.070.973.375.61170.272.875.472.174.577.01271.374.076.773.375.778.21372.575.277.974.476.979.41473.676.479.275.578.080.61574.777.580.376.579.181.81675.778.681.577.580.282.91776.779.782.678.581.284.01877.780.783.779.582.385.11978.781.784.880.483.286.12079.682.785.881.384.287.12180.583.786.882.285.188.12281.484.687.883.086.089.12382.285.588.883.886.990.02483.186.489.884.687.891.02482.485.789.183.987.190.32583.286.690.084.788.091.22684.087.490.985.588.892.12784.888.391.886.389.693.02885.589.192.787.090.493.82986.389.993.587.791.294.73087.090.794.388.491.995.53187.791.495.289.192.796.23288.492.295.989.793.497.03389.192.996.790.494.197.83489.893.697.591.094.898.53590.594.498.391.695.499.23691.195.199.092.296.199.93791.795.799.792.896.7100.63892.496.4100.593.497.4101.33993.097.1101.294.098.0102.04093.697.7101.994.698.6102.74194.298.4102.695.299.2103.34294.899.0103.395.799.9104.04395.499.7103.996.3100.4104.64496.0100.3104.696.8101.0105.24596.6100.9105.397.4101.6105.84697.2101.5105.997.9102.2106.54797.7102.1106.698.5102.8107.14898.3102.7107.299.0103.3107.74998.8103.3107.899.5103.9108.35099.4103.9108.4100.0104.4108.95199.9104.5109.1100.5105.0109.552100.4105.0109.7101.1105.6110.153101.0105.6110.3101.6106.1110.754101.5106.2110.9102.1106.7111.255102.0106.7111.5102.6107.2111.856102.5107.3112.1103.1107.8112.457103.0107.8112.6103.6108.3113.058103.5108.4113.2104.1108.9113.659104.0108.9113.8104.7109.4114.260104.5109.4114.4105.2110.0114.8体重方面：体重：（穿着内衣秤量）女孩男孩月P15P50P85//P15P50P8502.83.23.72.93.33.913.64.24.83.94.55.124.55.15.94.95.66.335.15.86.75.66.47.245.66.47.36.27.07.956.16.97.86.77.58.466.47.38.37.17.98.976.77.68.77.48.39.387.07.99.07.78.69.697.38.29.37.98.910.0107.58.59.68.29.210.3117.78.79.98.49.410.5127.98.910.28.69.610.8138.19.210.48.89.911.1148.39.410.79.010.111.3158.59.610.99.210.311.6168.79.811.29.410.511.8178.810.011.49.610.712.0189.010.211.69.710.912.3199.210.411.99.911.112.5209.410.612.110.111.312.7219.610.912.410.311.513.0229.811.112.610.511.813.2239.911.312.810.612.013.42410.111.513.110.812.213.72510.311.713.311.012.413.92610.511.913.611.112.514.12710.712.113.811.312.714.42810.812.314.011.512.914.62911.012.514.311.613.114.83011.212.714.511.813.315.03111.312.914.711.913.515.23211.513.115.012.113.715.53311.713.315.212.213.815.73411.813.515.412.414.015.93512.013.715.712.514.216.13612.113.915.912.714.316.33712.314.016.112.814.516.53812.514.216.312.914.716.73912.614.416.613.114.816.94012.814.616.813.215.017.14112.914.817.013.415.217.34213.115.017.313.515.317.54313.215.217.513.615.517.74413.415.317.713.815.717.94513.515.517.913.915.818.14613.715.718.214.116.018.34713.815.918.414.216.218.54814.016.118.614.316.318.74914.116.318.914.516.518.95014.316.419.114.616.719.15114.416.619.314.716.819.35214.516.819.514.917.019.55314.717.019.815.017.219.75414.817.220.015.217.319.95515.017.320.215.317.520.15615.117.520.415.417.720.35715.317.720.715.617.820.55815.417.920.915.718.020.75915.518.021.115.818.220.96015.718.221.316.018.321.1参考资料：《最新的儿童身高体重标准》