What This Calculator Measures
This calculator converts starting and ending average weights into a weekly change rate. It is designed for trend interpretation rather than emotional reaction to one scale reading.
Formula Used
A negative value means the ending average is lower. A positive value means it is higher.
How To Use The Result
Compare the rate with your goal, hunger, training, sleep, and adherence. If the rate is surprising, check whether the review period included unusual sodium, travel, illness, menstrual-cycle shifts, or major activity changes.
Example Trend Readings
| Change Over 14 Days | Weekly Rate | Interpretation |
|---|---|---|
| -0.8 lb | -0.4 lb/week | Small downward trend; watch another week. |
| -2.0 lb | -1.0 lb/week | Clearer downward trend if tracking was consistent. |
| +1.0 lb | +0.5 lb/week | Upward trend; compare with goal and context. |
Frequently Asked Questions
Why use weekly weight change rate?
A weekly rate makes different review windows comparable. A 1 lb change over 7 days and a 2 lb change over 14 days are both about 1 lb per week.
How do I calculate weight loss per week?
Subtract starting average weight from ending average weight, divide by the number of days between averages, then multiply by 7. A negative value means the average moved down.
Is 0.5 lb per week meaningful?
It can be meaningful if it repeats across multiple weeks, but one short window can still be affected by water, sodium, digestion, training, and weigh-in timing.
Should I use daily weigh-ins or averages?
Averages are usually better. Daily weigh-ins can move because of water, sodium, digestion, training soreness, and timing.
Does this calculate fat loss?
No. It calculates scale-weight change rate only. Scale weight includes water, glycogen, digestion, lean mass, and fat.