Pet Care Calc

Aquarium volume in US gallons and litres from inside dimensions, usable water after substrate, and the water's weight.

Human-equivalent age of a dog by the AVMA 15-9-5 rule and the 2020 epigenetic-clock formula 16 ln(age) + 31.

Split a daily food amount into evenly spaced meals between a first and last feeding time, with 12-hour clock times.

Grams, cups and per-meal portions of pet food from daily kcal and the food's kcal per kg or per cup, with a treat allowance.

Estimate a dog's or cat's ideal weight from current weight and a 1-9 body condition score (10% per point above 5).

Resting energy requirement (RER) in kcal/day for a dog or cat from body weight, using 70 x kg^0.75 and the linear shortcut.

Nitrate left after partial water changes, changes needed to reach a target, and the litres or gallons per change.