For information on the most lethal methods of suicide, a good starting point is the statistics on the number of successful suicides by method (see Suicide statistics). There is also a much published study from 19951, where 291 lay persons and 10 forensic pathologists rated the lethality, time, and agony for 28 methods of suicide for 4,117 cases of completed suicide in Los Angeles County in the period 1988-1991.

They were asked to rate each method as follows:

Lethality: How likely is the method to cause death (where 0% is no chance, and 100% is absolute certainty)

Time: An opinion on the length of time the method will require to produce death

Agony: The amount of pain and discomfort you would expect from the use of the particular method (ranked on scale of 0 to 100 where 0 is no pain/discomfort and 100 is the most pain/discomfort possible)

The outcome of the study is presented below, ranked by order of lethality from just the pathologists who participated in the study (the lay persons tended to drastically overestimate the lethality of methods).

Anyone reading this table to identify a suitable method of suicide is advised to read carefully the information on the dangers of the suicide methods mentioned on this site, and visit the section Help me, because statistically you are much more likely to hurt yourself by attempting suicide than to succeed killing yourself (see Suicide statistics for more information).

Rank Method Name Lethality (%) Time (min) Agony 1 Shotgun to head 99.0% 1.7 5.5 2 Cyanide 97.0% 1.8 51.5 3 Gunshot of head 97.0% 2.5 13 4 Shotgun to chest 96.4% 1.4 16 5 Explosives 96.4% 1.6 3.75 6 Hit by train 96.2% 17.92 7.08 7 Jump from height 93.4% 4.56 17.78 8 Gunshot of chest 89.5% 7 21.7 9 Hanging 89.5% 7 25.5 10 Auto crash 78.5% 20.5 30 11 Household toxins 77.5% 24 54.5 12 Set fire to self 76.5% 57 95 13 Structure fire 73.0% 52.5 91.5 14 Carbon Monoxide 71.0% 21.5 18 15 Hit by truck/auto 70.0% 19 63 16 Electrocution 65.5% 2.4 72 17 Gunshot of abdomen 65.0% 69 74 18 Drowning ocean/lake 63.0% 18.5 79 19 Stab of chest 58.5% 96 76 20 Cut throat 51.5% 15.5 86 21 Overdose illegal drugs 49.4% 116.25 5.25 22 Plastic bag over head 23.0% 7 23 23 Drowning bathtub 21.5% 18.5 79 24 Drowning swimming pool 21.5% 18.5 79 25 Stab of abdomen 12.5% 252 78 26 Overdose prescription drugs 12.3% 129 8.5 27 Overdose non-prescription drugs 6.0% 456 22.5 28 Cut wrists/arms/legs 6.0% 105 71

In the study, there were significant differences between the methods chosen by females and males, with males choosing the most lethal and quickest methods, and females selecting methods varying in lethality, duration, and agony.

However, it should be noted that different studies produce different results of the fatality of different methods. For instance, JJ Card2 estimated the lethality of suicide by guns as only 91.6% effective, and Farberow and Shneidman3 had it as low as 84.7%. The Hawaii Department of Health (1990) had it even lower at 73%. The same studies showed the effectiveness of hanging to vary between 77% and 88%.

Whilst individual studies might differ in terms of the actual mortality rate, they are fairly consistent that firearms and hanging are the two most effective methods. Jumping is also very effective if done from sufficient height.

However, the official data does not provide any detailed information on how to use any one method, information on the pros and cons, details on the likely pain of any method, or the likely pitfalls.

The Peaceful Pill Handbook by Nitschke & Stewart4 also ranks a number of suicide methods using its "Reliability & Peacefulness (RP)" test, although they only rank methods involving drugs or asphyxiation.

On this website, information from a variety of sources is provided on a variety of suicide methods, centred around those that are most effective or popular. Depending on the method selected, readers of this site are recommended to do their own Further reading.