How Much Does a Cigar Weigh Before and After Smoking?
Put a premium cigar on a precision scale before lighting it.
Smoke it.
Then collect the ash, weigh the remaining butt and compare the numbers.
A surprisingly large amount of the original solid mass is gone.
But it did not simply disappear.
The tobacco was chemically transformed and dispersed into ash, gases, water vapor and smoke particles.
What You'll Learn
- Why a cigar loses so much mass while burning.
- What becomes ash and what enters the air.
- Why water also contributes to the weight change.
- How to run a controlled El Septimo mass experiment.
Start With the Cigar on a Scale
Cigar weight varies substantially with dimensions, tobacco quantity and moisture condition.
A compact Robusto will generally contain less tobacco than a very large Gordo or Gigante. This is why comparing two unrelated cigars tells us relatively little.
For a useful experiment, select several identical cigars from the same box and record each starting weight to at least 0.01 gram if your scale permits.
Then Combustion Begins
Tobacco is largely organic material.
When it burns, heat drives several processes simultaneously. Moisture and volatile substances evaporate. Thermal decomposition, or pyrolysis, creates additional volatile compounds. Combustion and oxidation generate gases including carbon dioxide, carbon monoxide and water.
Only part of the original solid material remains as ash.
Scientific descriptions of tobacco combustion identify carbon dioxide, carbon monoxide and water among the volatile products, with non-combustible inorganic material remaining behind as ash.
So Where Did the Missing Weight Go?
Think of the cigar's starting mass as being divided into several destinations:
- Ash: non-combustible mineral material remains behind.
- Remaining cigar: the unsmoked butt still contains tobacco.
- Water vapor: moisture contained in the tobacco is heated and released.
- Gases: combustion produces gases including carbon dioxide and carbon monoxide.
- Smoke particles: some combustion and pyrolysis products become airborne particulate matter.
- Volatile compounds: heated tobacco releases many compounds into the smoke stream.
The scale only sees the solid material that remains. Much of everything else has entered the surrounding air.
Ash Is Only a Small Part of the Story
This is what makes the experiment visually surprising.
A large premium cigar can begin as a substantial cylinder of tobacco and end with a comparatively light structure of ash plus an unsmoked butt.
The ash is not compressed tobacco waiting to be reconstructed. Most combustible organic matter has already undergone chemical reactions and left the cigar in gaseous or particulate form.
The ash is the residue, not the missing cigar.
Smoking Pace Changes the Process
The exact mass distribution is not fixed.
Research on cigar burning has found that puff frequency and puff volume change combustion behavior and smoke emissions. Water, nicotine and carbon monoxide yields also change as the cigar progresses.
So a cigar smoked very rapidly and one smoked slowly should not automatically be expected to produce identical emission patterns.
This is why an El Septimo experiment should keep puff cadence as consistent as practical.
Run the El Septimo Weight Test
Choose several identical cigars from the El Septimo cigar collection.
For example, the currently listed El Septimo Coco is a 5¼ x 52 Robusto. Use cigars from the same box where possible.
For every cigar, record:
- Starting cigar weight
- Storage RH and temperature
- Total smoking time
- Number of relights
- Remaining butt weight
- Collected ash weight
The Mass-Balance Table
| Measurement | Result |
|---|---|
| Starting cigar | [GRAMS] |
| Remaining butt | [GRAMS] |
| Collected ash | [GRAMS] |
| Solid mass no longer present | [CALCULATE] |
| Smoking time | [MINUTES] |
The simple calculation is:
Starting Mass − Butt Mass − Collected Ash = Mass No Longer Present as Solid Cigar
That missing solid mass has largely been transformed and dispersed through combustion, pyrolysis and evaporation.
Do Not Call the Difference “Smoke Weight”
This distinction is important.
If a cigar loses 10 grams, it would be inaccurate to say that it produced exactly 10 grams of smoke.
The missing mass includes multiple pathways: gases, vapor, particulate matter and material that may not be completely captured by your ash collection.
A home experiment measures solid mass loss, not a laboratory-grade smoke yield.
Why Humidity Matters Before the Test
A wetter cigar can weigh more before smoking because tobacco is hygroscopic and contains moisture.
If two otherwise identical cigars are stored at different humidity levels, the starting mass itself may already differ.
That makes controlled storage essential if you want the experiment to focus on combustion rather than moisture condition.
Try It With Different Vitolas
This becomes even more interesting when comparing cigar dimensions.
El Septimo Dubai currently lists formats ranging from the 5¼ x 52 Coco Robusto and 5 x 54 Spain Rioja Robusto to the 6¼ x 70 Fabuloso Dark Ruby Gigante.
Instead of asking only which cigar takes longer to smoke, compare:
- Starting mass
- Mass consumed per minute
- Ash mass
- Remaining butt mass
- Total smoking duration
That turns cigar size into something measurable rather than purely visual.
Use a Proper Ash Collection Setup
If you want meaningful ash measurements, do not let half the ash fall onto the floor.
Use a clean dedicated ashtray and avoid mixing cigar ash with matches, food or another cigar. El Septimo Dubai currently carries a dedicated cigar ashtray collection.
Use the same cutting method and lighting method across each test.
Final Thoughts
A burning cigar is a visible demonstration of conservation of mass hidden inside a luxury ritual.
The tobacco does not vanish.
Solid organic material becomes gases, water vapor, airborne particles and other combustion products, while non-combustible minerals remain as ash.
The scale before and after smoking makes that transformation surprisingly easy to see.
You begin with tobacco in your hand. You end with ash in the tray and much of the original mass dispersed into the air.
Frequently Asked Questions
Where does a cigar's weight go when it burns?
Most of the consumed solid tobacco is transformed into gaseous and airborne combustion products, including carbon dioxide, carbon monoxide, water vapor and smoke particles. Inorganic material remains as ash.
Is the missing cigar weight equal to the weight of the smoke?
No. The mass loss includes gases, water vapor, particulate matter and other volatile combustion products, not just visible smoke.
Why does ash weigh much less than the original cigar?
Ash is primarily the non-combustible residue left after much of the organic tobacco material has been transformed during combustion.
Does cigar humidity affect its weight?
Yes. Tobacco exchanges moisture with its environment, so cigars conditioned at different humidity levels can have different starting masses.
Does cigar size affect how much mass is burned?
Yes. Larger cigars generally contain more tobacco, but smoking time, butt length, puff cadence and combustion behavior also influence how much material is consumed.
For adults 21+. Please enjoy responsibly.
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