change / Weight
Weight change calculator
Two weigh-ins, and the difference between them.
Answers now
Difference
1.2kg
- 23.6 kg
- Earlier
- 24.8 kg
- Later
- 184 days
- Over
Gone when you close this. Stored nowhere.
Where this number comes from
Units matched, then later minus earlier; dates subtracted on the calendar.
Step by step
Both numbers go to kilograms first (1 lb = 0.45359237 kg), then subtract. Days are counted on the calendar.
What this number cannot tell you
Gaining is not progress and losing is not failure. What you get is a signed number and a count of days, with no adjective attached and no plan to gain or lose. A child’s weight swings by a few hundred grams within a single day, so if the two weigh-ins differed in time of day, clothing or whether they had just eaten, part of the difference has nothing to do with growth.
An example
23.6 kg on 1 March, 24.8 kg on 1 September: 1.2 kg over 184 days.
Common questions
- Will this tell me whether my child is normal?
- No. What happens here is arithmetic, and “normal” needs an age-based reference table before it means anything — there is none behind these figures. The section above spells out what stays out of reach.
- Do the numbers I type reach your server?
- No. Everything is worked out in the browser on this device, and the page has no channel for sending data out — the site’s security policy closes that route outright, so it is not a promise you have to take on trust. Reload and the numbers are gone; to keep them, copy them.
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