How much energy/heat does one standard tea light candle produce?

How much energy/heat does one standard tea light candle produce?

You can check the answer of the people under the question at Quora “candle in coffee can for heat

0 thoughts on “How much energy/heat does one standard tea light candle produce?”

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    How much energy/heat does one standard tea light candle produce?

    How much energy/heat does one standard tea light candle produce?

    How much energy/heat does one standard tea light candle produce?

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  2. Looking at Amazon, I see that tea candles are a wax cylinder about 1.5 inches in diameter and * 0.5 inches tall. Volume of a cylinder is pi * r**2 * h = 0.883 cubic inches or 14.45 cm**3. The density of paraffin wax is 0.9 g/cm**3, so we’re looking at 13.03 grams of wax. The energy content of paraffin is about 42 kJ/g, so we’re looking at 547kJ. There are 0.277 watt-hours per kJ, so we’ve got about 152 watt hours.
    If you’re looking for the power, the amazon tea candles claim 4-5 hours, so 152 watt hours / 4.5 hours or about 33.8 watts on average. It would take just over 42 tea candles to match the thermal output of a 1440 watt space heater (12A at 120V).
    energy content of paraffin: Energy Content of Fuels
    tea candles: Tealight Candles White Unscented Set of 125: Furniture & Decor
    density of paraffin wax: Paraffin

  3. Each Tea candle weighs 8.5 grams (0.3 ounces). Assuming it is Wax/paraffin – 18,621 BTU / 0.45 kg or 450 grams (1 pound). Assuming it burns for 2 hours, it will produce same heat as produced by 50W bulb.
    One Tea candle = 352 BTU approx.
    1 BTU = 1054 Joules.
    1 Hp = 0.7063 BTU /sec.= 745 Watts = 745 Joules / sec.
    Energy in paraffin = 49 KJ/grams
    Paraffin in Tea Light = 17 grams
    If assuming Burn Time = 5 hours
    1 watt hour = 0.278 KJ
    Total = 49 x 17/5= 166KJ/H = 46.3 watt/hour
    One candle can raise the temperature of the room ~1 degree F

  4. You asked: ” How much energy/heat does one standard tea light candle produce?With one candle you can easily heat up drinks.. etc. The question is does the candle produce enough heat to make a difference in case you light up lets say 100 of them in a small room.”
    Here’s a suggestion. Starting with two tea light, weigh thm both. Light one and allow it to burn until it is completely out of fuel (wax). Weigh both lights. Since one has not changed weight, the other one is now the weight of the cup alone. Subtract the weight of cup from the total weight before you burned it. Now do the same with the second tea light. Weigh that 2nd cup, and subtract that from the original weight of the 2nd cup before burming. Add the two weights (after buring) together, and divide by two. Now you have a reasonably reliable weight for the average tea light.
    Look up the Low Heat Value of paraffin wax.
    Multiply by 100 (from your example) and convert that weight to whatever units were in the Low Heat Value for paraffin.
    Now divide the LHV by the weight of the tea lamp’s paraffin if the paraffin is the smaller value, or divide the paraffin multiply or divide that result by the actual LHV.
    Now, this is where it gets to be a pain, because the US still uses calories per gram, while the international scientific notation uses Joules per kilogram
    Air (dry)
    (J/kg per degree Celsius) = 1005
    (cal/gram per degree Celsius) = 0.24
    although you could use this to do the conversion if you need it:
    1 calorie = 4.186 joules
    Finally you have to measure the room (or make up a size for a room you want an estimate about), figure out the volume of air, convert that to the mass of the air in the room and see if the LHV of the paraffin of 100 tea lamps would raise it a noticeable amount or not (which also depends on what temperature it was to start with whether you’ll notice or not, and of course whether you will feel it depends on whether you are naked or wrapped up in a snow suit).
    The calculations are quite simple. Be sure to write down the numbers with a descriptive label about what you either measured of calculated so you can see what numbers you should be using.
    Good luck

    Stafford “Doc” Williamson

    p.s. Please don’t hesitate to correct me. I am often wrong, but I also take the attitude that if you don’t make some mistakes every day, you are probably not trying hard enough to stretch your own capacities.

  5. If a candle produces 100 BTU, and you need 20 BTU/sq ft to heat a room, then 1 candle would heat a 5 sq ft room. So, 0.2 candle/sq ft. Therefore, based on these assumptions, you would want approximately 29 candles for a 12’x12′ room. You should consider the multiple risks involved in this approach.

  6. How densely packed are the candles?
    Also, there’s a difference between heat and temperature, so to find out the heat, find out the average temperature until the candle burns out. Heat should be the average multiplied by the time.

    Eight O’Clock

  7. I took a tealight with 13.04 gr of wax.
    Burn time measured was 5:30 hrs… 330 min.
    13.04/330 gain a rate of 0,00395 gr/min
    42.0 kJ/g…. 0,01218 kW/g … 12,18 W/g
    13.04 gr x 12.8 W = 166.91 W/5,5 hours = 30,3 W/hr

  8. I do burn 20 wicks of liquid paraffin in the HERC Oven and can bake and cook the same as you can in your conventional oven. Breads, 12.5# turkey, Crème brûlée… This is possible because the oven was designed for just this propose, all parts working to that end, AND I am burning 20 candles in a space 18″x 12″x 12″ that is made up of 18 ga. stainless steel (terrible conductor of thermal energy), baking stones (heat reservoir) and has the correct drafting to insure complete combustion without venting any excess heat.
    Keep in mind paraffin is a petroleum product and so it is privy to the same energy densities as diesel, kerosene (jet fuel) and the like. all that and it is stable, difficult to dilute/contaminate and has a shelf life without end. HERC Oven on YouTube…

  9. Tea candles that I have use last 3 to 4 hours there for just good enough for a back yard party or holiday decoration. The Some package says 0.32 oz each wax varies from type to but around 125000 BTU per gallon in general rule of oil and wax products. So 0.32 oz divided by 128 is 0.0025 gallons. Take 0.0025 gallons 125000 and you get total BTU of candle 313 BTU total divide that by how long it last 3.5 hours. Equals 90 BTU/h. Now as general rule for space heaters 1500 watts will give you 5000 BTU or 3.3 BTU per watt. So divide 90 by 3.3 you right around 27 watts. So as general rule if heat a room with small electric space heater you need 60 of those candles. Or 600 to keep house warm on Winter day when power go out.


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