Convert kWh into joules, calories, or BTU when a bill, a diet label, and a furnace spec all mean energy.
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Use this for electricity bills, food energy, and heating figures that refuse to share a unit. Type the amount, pick the unit on the bill or label, then pick the unit you want.
Everything is converted through the joule. Calories here are thermochemical (1 cal = 4.184 J). A therm is 100 000 IT BTU (the US therm). Natural-gas CCF is not energy until you pick a heat content — use therms if you already have them.
Value: The energy amount you have.
From: The unit on the bill, label, or spec.
To: The unit you want to compare it in.
Result: The same energy in the To unit.
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