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©2013 UpToDate ® Print Email Modified Lund-Browder chart for assessing percent total body surface area burn in children and adults Area* Birth to 1 year 1 to 4 years 5 to 9 years 10 to 14 years Adult Head 9.5 8.5 6.5 5.5 4.5 Neck 1 1 1 1 1 Trunk 13 13 13 13 13 Upper arm 2 2 2 2 2 Forearm 1.5 1.5 1.5 1.5 1.5 Hand 1.25 1.25 1.25 1.25 1.25 Thigh 2.75 3.25 4 4.25 4.5 Leg 2.5 2.5 2.5 3 3.25 Foot 1.75 1.75 1.75 1.75 1.75 Buttock 2.5 2.5 2.5 2.5 2.5 Genitalia 1 1 1 1 1 * Values listed are for one surface area and each individual extremity. Anterior and posterior surface area values are equivalent in estimating TBSA. For circumferential burns, multiply surface area burned by two.