Horses Calculators & Tools
Practical tools for horses, ponies, and foals. Estimate your horse’s weight with a measuring tape, calculate daily hay and grain feeding amounts, and track 340-day foaling due dates.
All Horses Calculators (6)
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 kilograms or pounds from heart girth and body length tape 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.
Horse Concentrate & Grain Feed Calculator
Calculate balanced daily forage and grain concentrate portions based on your horse's body weight and activity level per NRC equine nutrition guidelines.
Horse Hay & Winter Forage Requirement Calculator
Calculates the daily hay requirement, cold-weather thermoregulatory deficit, and seasonal bale tonnage required for horses.
Scientific & Biological Overview
Horses are natural grazers with delicate digestive systems designed for fiber. Most healthy adult horses need at least 1.5% to 2% of their body weight in good-quality grass hay or pasture every single day to keep their gut moving smoothly.