Ƙiyasta tsayin yaro baligi daga tsayin iyaye (hanyar Tanner) kuma, idan an sani, daga tsayin yaron na yanzu da shekarunsa — hanyoyi biyu don kwatance.
| Hanya | Dabara |
|---|---|
| Tanner (yaro) | (Mother's height + Father's height + 13) ÷ 2 |
| Tanner (yarinya) | (Mother's height + Father's height − 13) ÷ 2 |
| Daga tsayin yanzu | Tsayin yanzu ÷ (yawanci % na tsayin manya a wannan shekarun) |
Kusan kashi 70–80% na tsayi ana tantance shi ta hanyar gado, sauran kuma ta abinci mai gina jiki, bacci, motsa jiki, da lafiyar gaba ɗaya. Waɗannan hanyoyin suna ba da ƙiyasi ne kawai — idan tsayin yaro ya bambanta da abin da ake tsammani, a tuntuɓi likitan yara.
Hanyar Tanner tana da kuskure kusan ±8.5 cm ga maza da ±9 cm ga mata. Hanyar tsayi na yanzu/shekaru yawanci ta fi daidaito ga manyan yara (±5–8 cm), amma har yanzu kimantawa ce kawai.
13 cm ita ce matsakaicin bambancin tsayi tsakanin manya maza da mata. Tsarin Tanner yana daidaita matsakaicin tsayin iyaye da wannan bambancin dangane da jinsin yaro.
A'a. Wannan kiyasi ne na ƙididdiga, ba ganewar asali ba. Idan kun damu da girma na yaro (da sauri/sannu, karkacewa daga tsarin girma), tuntuɓi likitan yara.
e-Buhalteris yana taimaka maka wajen kula da asusu — ga masu sana'a ɗaya ko kamfanoni.
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