I found an error in my calculations, an off by factor-2. This version provides a more granular increment in sats per dollar and yields an average error range of +/-1.7%, and maximum of 2.4%
Here is a more concise table.
$/BTC From$/BTC Up toSat/$
$29,857.40$30,776.523300
$30,776.52$31,754.033200
$31,754.03$32,795.703100
$32,795.70$33,908.053000
$33,908.05$35,098.522900
$35,098.52$36,375.662800
$36,375.66$37,749.292700
$37,749.29$39,230.772600
$39,230.77$40,833.332500
$40,833.33$42,572.462400
$42,572.46$44,466.402300
$44,466.40$46,536.802200
$46,536.80$48,199.772100
$48,199.77$49,390.242050
$49,390.24$50,641.032000
$50,641.03$51,956.821950
$51,956.82$53,342.821900
$53,342.82$54,804.801850
$54,804.80$56,349.211800
$56,349.21$57,983.191750
$57,983.19$59,714.801700
$59,714.80$61,553.031650
$61,553.03$63,508.061600
$63,508.06$65,591.401550
$65,591.40$67,816.091500
$67,816.09$70,197.041450
$70,197.04$72,751.321400
$72,751.32$75,498.581350
$75,498.58$78,461.541300
$78,461.54$81,666.671250
$81,666.67$85,144.931200
$85,144.93$88,932.811150
$88,932.81$93,073.591100
$93,073.59$97,124.001050
$97,124.00$101,051.341010
What the spreadsheet tells us is that you will have better than 2.5% accuracy if you:
  • round to the nearest hundred sats/$ when bitcoin is between 4000 and 2100 sats/$ ($25k to about $48k)
  • round to the nearest fifty sats/$ when bitcoin is between 2100 and 1000 sats/$ (about $50k to $100k)
Another way to put it is "above 2100 sats/$, round to nearest 100, below 2100 sats/$ round to nearest 50."
This works up to $100k/BTC
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