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.
Use the step-start weight to determine feeding for each 3-month step, then reassess and adjust at the end of each interval. If expected weight loss is not acheived in 90 days, reassess weight loss approach.

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 90-day step; reassess at the end of each interval.

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