Horses Calculators & Reference Tools
Equine weight estimation tapes, NRC digestible energy (DE Mcal/day), daily forage intake rules, and 340-day foaling calculators.
All Horses Calculators (4)
Select a verified tool to calculate nutritional requirements, body mass estimates, growth curves, or reproductive timelines.
Horse Weight Calculator (Heart Girth & Length)
Calculates horse body weight in pounds or kilograms from heart girth and body length measurements.
Horse Digestible Energy (DE / Calorie) Calculator
Computes daily digestible energy requirements in Megacalories (Mcal/day) for horses across all workloads from maintenance to heavy work.
Horse Daily Forage & Feed Intake Calculator
Calculates the recommended daily dry forage allocation and grain partitions to prevent colic and gastric ulcers.
Horse Pregnancy & Foaling Due Date Calculator
Computes estimated foaling due date, trimester milestones, and pre-foaling vaccination deadlines for pregnant mares.
Scientific & Biological Overview
Equine body mass is calculated morphometrically: (Heart Girth² × Length) ÷ 330. Hindgut fermenters require a minimum of 1.5% to 2.0% BW in dry forage daily.