Weekly Weight Loss Percentage Calculator — % Per Week

A weekly percentage answers a different question from a total percentage: not how far you have come, but how fast. The conversion is a single division — total percentage over the number of weeks it took. Someone who has lost 6% across 8 weeks is averaging 0.75% a week (6 ÷ 8); someone who lost 12% across 20 weeks is averaging 0.6% a week. Reading the pace this way is more useful than raw pounds per week, because it stays proportional to your body: half a percent a week means the same relative effort whether you weigh 150 lb or 250 lb. The Weight Loss Percentage Calculator this page is built on computes both the total figure and, once you add the weeks elapsed, the rate per week.

The pace most often described as sustainable is about 0.5–1% of body weight per week — a widely cited general guideline rather than a figure from any single trial. The value of reaching the percentage milestones it builds toward is documented in the modest-weight-loss literature summarised by Wing and colleagues (2011). In pounds that lands near 1–2 lb a week for a 200-pound person and closer to 0.75–1.5 lb for a 150-pound person, which is why a percentage pace, not a flat pound target, keeps the effort proportional. Weeks that run well above 1% are frequently dominated by water and glycogen rather than fat, particularly in the first fortnight of a new routine. To translate a target weekly pace into the daily calorie gap it requires, the Calorie Deficit Calculator does the arithmetic.

A weekly percentage that drifts downward over time is usually the arithmetic working as expected, not a sign that progress has stopped. As you get lighter, a steady pound-a-week loss becomes a larger fraction of a smaller body from the other direction — hold the pounds steady and the percentage of your current weight it represents actually rises, while holding the percentage steady means the pounds shrink. Either way, the weekly figure tends to soften as the journey continues. A single flat week rarely means much on its own, because normal water swings of a pound or two can hide the underlying trend; averaging across two or three weeks gives a truer read. When you would rather plan forward to a specific goal weight and date, the Goal Weight Calculator runs the timeline from your own numbers.