Horses & Livestock calculators

Weight tapes and formulas give a useful estimate when no scale is available. The horse weight calculator uses a published heart-girth formula; it is an estimate for adult horses and must not be used to work out medication doses.

• Horse Weight CalculatorEstimate your horse's weight from its heart girth and body length with a tape measure.
• Horse Hay Cost CalculatorWork out how long a bale lasts and what hay costs per day, month and year.
• Horse Maintenance Nutrients CalculatorSee the daily minimum energy, protein, calcium, phosphorus and vitamin A a mature horse needs for maintenance, from its weight.
• Lactating Mare Nutrients CalculatorSee the daily minimum energy, protein, calcium and phosphorus range a lactating mare needs, from her weight and the stage of lactation.
• Horse Hay Needs CalculatorEstimate how much hay a horse eats a day as a range, from its weight and the dry-matter content of the hay, and what that means in bales and cost.

Every calculator shows its formula and sources, works in metric and imperial units, and gives estimates only. Read how we build and review them in our editorial policy and formulas & sources.