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Pet Food Reorder Calculator
Estimate when pet food will run short and when to reorder. Combine multiple pets' daily consumption with stock, delivery lead time and a safety buffer.
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Select your counting rules and calculate.
Calculation details
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How to use this calculator
Enter food remaining before feeding on the starting date, using grams. Add each pet's daily consumption in grams, plus delivery lead days and extra safety days.
The first shortage date is the first date with less than a full day's food. Reorder is that date minus delivery lead time and safety buffer. Deliveries are assumed to arrive before feeding. The result flags when ordering on the entered date would arrive too late.
A worked example
6,000 grams at 300 grams per day covers 20 full days from November 2. The first shortage is November 22. With three delivery days and two safety days, reorder by November 17.
Will this recommend how much my pet should eat?
No. Daily consumption is supplied by you. The tool performs inventory planning, without nutrition advice or an assumed conversion between cups and grams.
Further reading: Source workflow and conventions. Your entered rules determine this result.
Which calendar and years are supported?
Use Gregorian dates from 1900 through 2100, with results inside that range. Most daily plans are limited to 366 dates; academic terms and sprint plans allow up to 731. Forms limit the number of entries to keep calculations responsive. Holidays and policy rules come from your inputs. Date-only plans ignore DST; tools with time-zone inputs use the browser's time-zone data and explicitly resolve repeated times. Calendar exports preserve date-only markers or exact timed events as appropriate. Calculations run only when requested, without background polling.
What happens to my dates?
Calculations run on your device. Saving a calculation is optional and keeps it in this browser. A setup link contains the dates and settings you entered; anyone with the link can read them. Use one tab per saved calculator. Clear saved data from Privacy & settings.