Number Converter and Risk Charts (2024)

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Woloshin S, Schwartz LM, Welch HG. Know Your Chances: Understanding Health Statistics. Berkeley (CA): University of California Press; 2008.

Number Converter

1 in __DecimalPercent__ out of 1,000
1 in 11.00100%1,000 out of 1,000
1 in 20.5050%500 out of 1,000
1 in 30.3333%333 out of 1,000
1 in 40.2525%250 out of 1,000
1 in 50.2020%200 out of 1,000
1 in 60.1717%167 out of 1,000
1 in 70.1414%143 out of 1,000
1 in 80.1313%125 out of 1,000
1 in 90.1111%111 out of 1,000
1 in 100.1010%100 out of 1,000
1 in 200.055.0%50 out of 1,000
1 in 250.044.0%40 out of 1,000
1 in 500.022.0%20 out of 1,000
1 in 1000.011.0%10 out of 1,000
1 in 2000.00500.50%5 out of 1,000
1 in 2500.00400.40%4 out of 1,000
1 in 3000.00330.33%3.3 out of 1,000
1 in 4000.00250.25%2.5 out of 1,000
1 in 5000.00200.20%2.0 out of 1,000
1 in 6000.00170.17%1.7 out of 1,000
1 in 7000.00140.14%1.4 out of 1,000
1 in 8000.00130.13%1.3 out of 1,000
1 in 9000.00110.11%1.1 out of 1,000
1 in 1,0000.00100.10%1.0 out of 1,000
1 in 2,0000.000500.050%0.50 out of 1,000
1 in 3,0000.000330.033%0.33 out of 1,000
1 in 4,0000.000250.025%0.25 out of 1,000
1 in 5,0000.000200.020%0.20 out of 1,000
1 in 10,0000.000100.010%0.10 out of 1,000
1 in 25,0000.000040.004%0.040 out of 1,000
1 in 50,0000.000020.002%0.020 out of 1,000
1 in 100,0000.000010.001%0.010 out of 1,000
1 in 1,000,0000.0000010.0001%0.001 out of 1,000

Note: For numbers less than 1 out of 1,000 (such as 0.50 out of 1,000), it is clearer to recast them as “___ out of 10,000” (“5 out of 10,000,” for instance), because it allows you to use a whole number rather than a decimal.

Risk Chart for Men

Find the line closest to your age and smoking status. The numbers in that row tell you how many out of 1,000 men in that group will die in the next 10 years from . . .

AgeSmoking StatusVascular DiseaseCancerInfectionLung DiseaseAccidentsAll Causes Combined
Heart AttackStrokeLungColonProstatePneumoniaFluAIDSCOPD
35Never smoked112515
Smoker7112542
40Never smoked31112624
Smoker1424121662
45Never smoked61112635
Smoker21381122691
50Never smoked11112111549
Smoker29518211135128
55Never smoked193132111574
Smoker41734312174178
60Never smoked3252532115115
Smoker5611595331164256
65Never smoked529486336176
Smoker741689765265365
70Never smoked871861012657291
Smoker100261139109456511
75Never smoked137328131912611449
Smoker14039109111516609667

Source: Steven Woloshin, Lisa Schwartz, and H. Gilbert Welch, “The Risk of Death by Age, Sex, and Smoking Status in the United States: Putting Health Risks in Context,” Journal of the National Cancer Institute 100 (2008): 845–853.

Note: Shaded portions mean that the chance is less than 1 out of 1,000. People who have never smoked are defined as those who do not smoke now and who have smoked fewer than 100 cigarettes in their lifetime. Smokers are defined as people who have smoked at least 100 cigarettes in their lifetime and who currently smoke (any amount). COPD is chronic obstructive pulmonary disease, which includes emphysema and chronic bronchitis. The numbers in the All Causes Combined column do not represent row totals because they include many other causes of death in addition to the ones listed in the chart.

Risk Chart for Women

Find the line closest to your age and smoking status. The numbers in that row tell you how many out of 1,000 women in that group will die in the next 10 years from . . .

AgeSmoking StatusVascular DiseaseCancerInfectionLung DiseaseAccidentsAll Causes Combined
Heart AttackStrokeLungBreastColonOvarianCervicalPneumoniaFluAIDSCOPD
35 Never smoked111214
Smoker11111214
40Never smoked1211219
Smoker424211227
45Never smoked2113111225
Smoker937311112245
50Never smoked411411237
Smoker1351441114269
55Never smoked822622111255
Smoker206265221192110
60Never smoked1443733112284
Smoker3184163312182167
65Never smoked25758541233131
Smoker45155575314313241
70Never smoked461479741454207
Smoker66256186417444335
75Never smoked86307101051867335
Smoker993458109414617463

Source: Steven Woloshin, Lisa Schwartz, and H. Gilbert Welch, “The Risk of Death by Age, Sex, and Smoking Status in the United States: Putting Health Risks in Context,” Journal of the National Cancer Institute 100 (2008): 845–853.

Note: Shaded portions mean that the chance is less than 1 out of 1,000. People who have never smoked are defined as those who do not smoke now and who have smoked fewer than 100 cigarettes in their lifetime. Smokers are defined as people who have smoked at least 100 cigarettes in their lifetime and who currently smoke (any amount). COPD is chronic obstructive pulmonary disease, which includes emphysema and chronic bronchitis. The numbers in the All Causes Combined column do not represent row totals because they include many other causes of death in addition to the ones listed in the chart.

Copyright © 2008, The Regents of the University ofCalifornia.

Know Your Chances: Understanding Health Statistics is herebylicensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0Unported license, which permits copying, distribution, and transmission of thework, provided the original work is properly cited, not used for commercialpurposes, nor is altered or transformed.

Bookshelf ID: NBK126161

Contents

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Number Converter and Risk Charts (2024)

FAQs

How rare is 0.02 chance? ›

Number Converter
1 in __DecimalPercent
1 in 250.044.0%
1 in 500.022.0%
1 in 1000.011.0%
1 in 2000.00500.50%
29 more rows

How rare is 1 in 1000? ›

0.0010 0.10%

How much is 0.1 chance? ›

If you and I both believe that something has a 0.1% chance of happening, then we believe that it is 999 times as likely not to happen as it is to happen.

How rare is 1 in 2? ›

A 1 in 2 chance is 50% and 0.5 as a decimal.

Does 0% chance exist? ›

All the possible outcomes have zero probability

In everyday language, a zero-probability event is an event that never happens.

What is 0.02 out of 100? ›

Hence, 0.02 is 2%

Is 1 in 100 people rare? ›

uncommon – this means that between 1 in 100 and 1 in 1,000 people may be affected. rare – means that between 1 in 1,000 and 1 in 10,000 people may be affected. very rare – means that fewer than 1 in 10,000 people may be affected.

How rare is one in a million? ›

Littlewood's law states that a person can expect to experience events with odds of one in a million (referred to as a "miracle") at the rate of about one per month.

What has a 1 in 200,000 chance? ›

Your odds of birthing conjoined twins are about 1 in 200,000, according to the University of Maryland Medical Center. Your odds of giving birth to normal identical twins? About 1 in 250.

How rare is 0.05% chance? ›

If you have a 0.05% chance, you'll get that result one tenth that often, once every 2000 tries, on average about 1000 tries to see it. But it could happen on the first try, and it may not happen until the 10,000th try.

What is 20% out of 50? ›

Hence, 20% of 50 is 10.

What is a 40 out of 50? ›

40 is 80 percent of 50.

To find our answer, we need to find the decimal that represents how much of 50 is 40. To do that, we divide 40 by 50. All that is left is to multiply 0.8 by 100 to convert it to a percentage. When we add the percentage symbol, we get 80% for an answer.

How rare is 1 in 5000? ›

Well, getting something that is a 1 per 5000 people scenario is extremely unlikely. That's a 0.0002 or 0.02% chance. Means you have a 99.98% chance of NOT getting maybe prion disease if that's what you're talking about.

How rare is 1% twice? ›

The probability of two independent events, A and B both happening is equal to the product of their probabilities. Therefore it is 1/100 * 1/100 = 1/10000.

How much is 50% out of 300? ›

50% of 300 is 150.

What is 0.02% as a fraction? ›

Answer: 0.02 can be written in fraction form as 1/50.

Since 2 is the common factor of 2 and 100 so we divide both the numerator and denominator by 2.

How rare is a 0.001 percent chance? ›

p=0.001 means that the chances are only 1 in a thousand. The choice of significance level at which you reject null hypothesis is arbitrary. Conventionally, 5%, 1% and 0.1% levels are used.

What are the odds of a 0.25% chance? ›

0.25% odds of occurrence is to say that an event has 1 way of occurring and 400 ways of not occurring. In terms of probability, this event has a probability of occurrence = 1/401 = 0.002493765…~ 0.249%.

How rare is a 0.00005 chance? ›

0.0005% That is 5 times in a million or 1 in 200,000. That is a VERY low probability of something happening. Typical chance of winning the lottery - 1 in 45 million.

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