1% Per Month Is 'Just 600 Grams' - But...

Imagine a person weighing 60 kg who gains 1% of their body weight every month. In the first month, that is just 600 grams - about the amount you might gain after a night out. "Only 600 grams, no big deal," you think. But when this "mere 1%" compounds month after month, the results are staggering.

After 1 year (12 months): 60 × (1.01)^12 ≈ 67.6 kg. A 7.6 kg gain - the "you've put on a bit of weight" stage. After 3 years (36 months): 60 × (1.01)^36 ≈ 85.8 kg. A 25.8 kg gain - practically a different person. After 5 years (60 months): 60 × (1.01)^60 ≈ 108.5 kg. Nearly double the starting weight. After 10 years (120 months): 60 × (1.01)^120 ≈ 196.3 kg. An unrealistic number in practice, but it vividly illustrates how powerful "just 1% per month" compounding really is.

What About Losing 1% Per Month?

Compounding works as an ally too. An 80 kg person who loses 1% of body weight each month drops 800 grams in month one. After 3 months: 80 × (0.99)^3 ≈ 77.6 kg. After 6 months: 75.3 kg. After 1 year: 70.8 kg. A comfortable pace that sheds about 9 kg in a year. At 1% per month, the absolute amount lost shrinks as you get lighter - 800 grams at 80 kg, 700 grams at 70 kg. This is the beauty of "compound-style weight loss": the strain on your body naturally decreases over time.

In the dieting world, losing 1-2% of body weight per month is considered healthy. This happens to align perfectly with the pace at which compound math produces sustainable results.

Money and Weight Are Both Shaped by Small Habits

Earning 1% monthly returns on investments translates to about 12.7% annually (compounded). Gaining 1% body weight per month also means about 12.7% annual increase. Mathematically, the structure is identical. In the financial world, "steady monthly contributions" are encouraged; in the health world, "steady monthly gains" must be prevented. In both cases, small daily habits compound into large outcomes. Eating a little less at dinner tonight is a gift to your future self - just as meaningful as investing 1,000 yen today.