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Author Topic: Bitcoin to USD formula?  (Read 3757 times)
Snake X
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June 03, 2011, 01:54:08 AM
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I alwasy wandered what a formula is to hand convert any amount of BTC to USD is based on the variable exchange rate.. what Is it anyhow?
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fabianhjr
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June 03, 2011, 01:56:37 AM
 #2

Demand and Supply.
Search it up.

Snake X
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June 03, 2011, 02:01:27 AM
 #3

no I mean as in if I have 0.08 BTC in my wallet (Which I do) and 1 BTC is worth $10.50, how much is 0.08 BTC? How did you get the answer?
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June 03, 2011, 02:06:27 AM
 #4

Use a calculator to multiply the price times the amount. So your 0.08 BTC at $10.50 is equivalent to $0.84.
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June 03, 2011, 02:10:37 AM
 #5

Not that we need it, but I checked to see if Wolfram-Alpha understood bitcoins yet. It does not.

Use my Trade Hill referral code: TH-R11519

Check out bitcoinity.org and Ripple.

Shameless display of my bitcoin address:
1Hio4bqPUZnhr2SWi4WgsnVU1ph3EkusvH
againey
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June 03, 2011, 02:10:57 AM
 #6

no I mean as in if I have 0.08 BTC in my wallet (Which I do) and 1 BTC is worth $10.50, how much is 0.08 BTC? How did you get the answer?

Physics class taught me how to do nearly all unit conversions.  First, start with the ratio of one unit to another and represent it as a fraction, with the desired unit on top:

Code:
10.50 USD
---------
 1.00 BTC

Then multiply that fraction by the value you currently know over a unitless 1:

Code:
10.50 USD   0.08 BTC
--------- * --------
 1.00 BTC      1

The units that you start with will cancel out, since one is on top and the other on bottom.  You'll be left with just the unit type you want.

Code:
10.50 USD   0.08
--------- * ----
  1.00       1

Now actually do the math, and you have your value:

Code:
10.50 USD   0.08
--------- * ---- = 10.50 USD * 0.08 = 0.84 USD
  1.00       1
Snake X
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June 03, 2011, 02:18:25 AM
 #7

 just do what rubic said
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June 03, 2011, 06:25:41 AM
 #8

X USD = e^{t} * 1 BTC

Where t=0 is the moment one BTC was worth one USD.
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