Weekly Average Weight Calculator
Calculate the arithmetic mean of up to seven weight readings. See the number of entries and their range.
Your inputs
Your measurement journal
70 kg
Mean of 7 entered readings
Full result table
| Entry | kg | Difference from mean (kg) |
|---|---|---|
| 1 | 70 | 0 |
| 2 | 70.2 | 0.2 |
| 3 | 69.8 | -0.2 |
| 4 | 70.1 | 0.1 |
| 5 | 69.9 | -0.1 |
| 6 | 70 | 0 |
| 7 | 70 | 0 |
Missing days are omitted, never treated as zero. Use comparable measurement conditions.
Let’s work it out.
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How to use Weekly Average Weight Calculator
- Enter weight readings (kg).
- Calculate, then explore reading order, distance from average, absolute weights.
- Read the worked example and calculation limits before applying the result.
Worked example
Seven readings totalling 490 kg have an average of 70 kg.
Formula, accuracy & limitations
Average = sum of readings ÷ number of readings.
Missing days are omitted, never treated as zero. Use comparable measurement conditions.
Calculations use your inputs. Main numeric values show up to six decimal places, percentages up to two, and chart labels up to four. Time results use hours, minutes and seconds. Very small nonzero values use scientific notation.
Use comparable readings, not an invented missing day
Enter up to seven weights in kilograms. The calculator averages only the readings present. Five entries produce a five-reading mean, even if the surrounding week has seven calendar days. A blank day is not inserted as zero and readings are not automatically assigned dates.
Read the line, mean and deviations together
The line follows the order of your readings. The reference mean uses the same seven-or-fewer values as the main result. The deviation view shows each measurement minus that mean, while the absolute bars retain a zero baseline. These views describe the entered data; the first-to-last change is not a fitted trend or a prediction.
What a short average can and cannot tell you
Changes in measurement conditions can affect the readings. Use the same scale and comparable conditions when that is practical. A weekly mean does not identify fat loss, muscle change or hydration, and the page does not judge a particular weight as healthy.
Frequently asked questions
Do I need all seven daily weights?
Enter between one and seven positive readings. The mean uses the actual count, so missing days are omitted instead of inserted as zero. The page describes a reading sequence rather than a dated log.
Why can the line look steep when weights are close?
The line uses the observed minimum and maximum on its labelled y-axis so small changes remain visible. Use the absolute-weight bars for a zero-baseline comparison. A steep-looking line is not a health assessment.
What does a negative deviation mean?
Deviation is that reading minus the arithmetic mean of the entered readings. A negative number is below this sample mean. It is not a deviation from an ideal or recommended weight.
Can this average show how much body fat changed?
Body-fat change cannot be separated from these weight readings. The mean and first-to-last difference describe the supplied measurements and do not identify changes in muscle, fat or fluid.
