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Free Calculators

Pig Farming Calculators

Gestation dates, feed conversion ratio, and feed-to-market forecasts.

Gestation

Pig Gestation Calculator

Enter the breeding date to get the expected farrowing date using the 114-day rule (3 months, 3 weeks, 3 days).

Breeding Date
Expected Farrowing Date

Normal gestation range: 112–116 days. Larger litters may farrow 1–2 days early; smaller litters may go 1–2 days late.

Feed Conversion

FCR Calculator

Calculate your pig's feed conversion ratio from feed consumed and weight gained over a period.

Feed Consumedlbs
Weight Gainedlbs
Feed Conversion Ratio

Typical FCR ranges by stage: Nursery 1.3–1.6, Grower 2.0–2.5, Finisher 2.8–3.2. Wean-to-finish average: 2.7–2.9.

Feed Forecast

Feed Needed to Reach Market Weight

Estimate how much feed your pig will consume going from its current weight to a target weight, using stage-based FCR values.

Current Weightlbs
Target Weightlbs
Estimated Feed Needed

Uses midpoint FCR per growth stage: 1.45 (12–50 lbs), 2.25 (50–150 lbs), 3.0 (150+ lbs). Estimates vary with genetics, feed quality, and environment.