This calculator uses the formula RER = 70 × kg^0.75 (Kleiber).
There are four fixed 3-month steps: 0–3, 3–6, 6–9, 9–12 months.
Feed based on the step-start weight for each step; reassess at each step.

Patient & Plan

Species

Units

Current Weight

Ideal Weight

Loss Method

Fixed loss per month (cats default 0.5 lb / 0.23 kg)

Feeding Factor

Plan Summary

Step Weight Loss 0–12 months

Feed at the Step Start Weight for each 3-month step; reassess at the end of each step.

Step	Months	Step Start Weight	Ending Step Target Weight	Daily kcals to feed for weight loss (% of RER)	RER (70×kg^0.75)

Patient / Client Name

Date

Notes

Disclaimer

These guidelines were developed by the Association for Pet Obesity Prevention (APOP) to reflect the current consensus of veterinary experts in companion animal weight management. They are intended to serve as a guideline only. These recommendations should not be interpreted as dictating an exclusive protocol, course of treatment, or procedure.

Variations in practice may be appropriate based on the needs of individual patients, the professional judgment of the veterinary healthcare team, and the resources and limitations of each practice setting.

This tool is designed for use by veterinary professionals. For pets with a BCS of 7/9 or higher, APOP strongly recommends initiating a Step Weight Loss Plan under direct veterinary supervision. Regular monitoring is essential.