ATP turnover

Rough estimate for ATP turnover rate, using the following quantities

1) amount of ATP used per day per person (bionumbers 105606), is 60 kg of ATP per day, so 6e4 grams ATP per day per body == A

2) number of cells in body (bionumbers 109716), (3.7 +- 0.8)e13 == B

3)weight of ATP from wikipedia, 507.18 grams/mol, so that's about 507.18/6.02e23 = 8.42e-22 grams per ATP == C

So we have A/B grams ATP per day per cell, so A/(B*C) ATP molecules turned over per cell per day, so

A/(B*C*3600*24) ATP molecules per cell per second. Caladis gives (www.caladis.org/compute/?q=6e4%2F(%24B*8.42e-22*3600*24)&v=B%3Anorm%2C3.7e13%2C0.8e13&x=off&n=m&h=fd&a=rad&_=1430145263223) :

mean = 2.35e7

stdev = 6.34e6