Swine-number help kit

Swine-number help kit

Production Calculators

Select a sub-calculator below to estimate different aspects of swine production.

Annual and weekly female replacement rate

Herd size (breeding females):

Yearly removal rate (%):

Breeding Rate (% that get bred):

Selection Rate (% not removed for issues):

Survivability (% live to breeding):

Yearly Gilt Replacement

Weekly Gilt Replacement

Wean-to-Finish Mortality Calculator

Number of pigs weaned:

Nursery mortality (%):

Grow-Finish mortality (%):

Pigs reaching market

Farrowing Rate & Breeding Efficiency

Number of sows bred:

Number of sows pregnant:

Number of sows farrowed:

Conception and Farrowing Rates

Litter Size Projection

Parity 1 average total born:

Percent of sows parity 1:

Parity 2+ average total born:

Percent of sows parity 2+:

Projected Piglets

Feed Conversion & Feed Cost

ADG (lb/day):

FCR (Feed conversion ratio):

Days on feed:

Feed cost per ton ($):

Feed Use and Cost

Partial Budget / ROI Calculator

Cost of new idea per pig:

Extra profit or savings per pig:

Number of pigs involved:

Net Gain/Loss and ROI

Space Requirement / Stocking Density

Number of pigs:

Space per pig (sq ft):

Total space needed

Days to Market / Weight Projection

Current weight (lb):

Target market weight (lb):

ADG (lb/day):

Days to reach target

Pig Flow / Barn Throughput Calculator

Barn capacity:

Days per cycle:

Overall mortality (%):

Pigs produced per year

Statistical Concepts

Key ideas to understand before calculating sample sizes.

Terms in Simple Language

Confidence Level

How sure we are that our numbers represent the whole population.

Margin of Error

How close our sample estimate is expected to be to the true population value.

Power

The ability of a study to detect a true difference when one exists.

Effect Size

The magnitude of the difference between groups (e.g., average weight difference).

Variation

The greater the variability or deviation of observed values from the mean, the more samples we need.

Prevalence

The fraction (or %) of animals that have a certain condition or disease at a given time.

Clustering

The degree of spread of a pathogen in a room. A clustering of 0% means infected pigs are randomly distributed, while 100% clustering means all infections are concentrated within the smallest possible number of litters.

Sample Size for One Mean

Std Dev (guess):

Difference to detect:

Confidence level: 0.81000.950.80.820.840.860.880.90.920.940.960.981

Power (0-1):

Number of pigs needed:

Sample Size for Two Independent Means

Std Dev in each group:

Difference to detect:

Confidence level: 0.81000.950.80.820.840.860.880.90.920.940.960.981

Power (0-1):

Number of pigs needed per group:

Sample Size for Two Paired Means

Std Dev of differences:

Difference to detect:

Confidence level: 0.81000.950.80.820.840.860.880.90.920.940.960.981

Power (0-1):

Total pairs needed:

Sample Size for One Proportion

Estimated proportion (0-1):

Margin of error:

Confidence level: 0.81000.950.80.820.840.860.880.90.920.940.960.981

Sample size needed:

Sample Size for Two Proportions

Group1 proportion (0-1):

Group2 proportion (0-1):

Power (0-1):

Confidence level: 0.81000.950.80.820.840.860.880.90.920.940.960.981

Sample size per group:

Sample size to detect a disease pathogen

Estimated prevalence (%):

Population size (number of individuals):

Test sensitivity (%): 010000950102030405060708090100

Test specificity (%): 010000990102030405060708090100

Confidence level(0%-100%): 80100009580828486889092949698100

Number of samples needed:

Sample size to estimate prevalence at the animal level

Estimated prevalence (0%-100%):

Margin of error (0%-100%):

Confidence level (0%-100%): 80100009580828486889092949698100

Number of samples needed:

How many pigs to test (PRRSV)?

Total pigs in room:

Confidence (80%-100%): 80100009580828486889092949698100

Prevalence guess (0-100%): 010000100102030405060708090100

Sample type:

Samples needed:

Source article: Osemeke et al. (2023). Frontiers article

FOF Sampling (PRRSV)

Inputs

Estimated prevalence (0%-100%):

Select pool size:

Number of pools:

Number of crates:

Clustering (0-100%) 010000610102030405060708090100

Average # pigs per litter:

Results & Details

Results:

Source articles: Osemeke et al. (2022). PMC10099699 and Osemeke et al. (2023). PMID: 35816833

Processing Fluids Sampling (PRRSV)

Inputs

Total # litters (across rooms):

Average pigs per litter:

Estimated PRRSV prevalence (0%-100%):

Results & Details

Results:

Source article: Lopez, et al. (2021). Vet. Micro.

Nasal Wipes (NW) sampling for IAV

Inputs

Estimated IAV prevalence (0%-100%):

Pool size (3,5,10):

Number of pools:

Total pigles:

Results

Source article: Moraes et.al. 2025 (in press)

Family Oral Fluids (FOF) sampling for IAV

Inputs

Estimated IAV prevalence (0%-100%):

Select pool size:

Number of pools:

Number of crates:

Clustering (0-50%) 050003105101520253035404550

Average # pigs per litter:

Results

Source article: Moraes et. al., 2025 (in press)

Udder Wipes (UW) sampling for IAV

Inputs

Estimated IAV prevalence (0%-100%):

Select pool size:

Number of pools:

Number of crates:

Clustering (0-50%) 050003105101520253035404550

Average # pigs per litter:

Results

Source article: Moraes et. al., 2025 (in press)

Weekly Commodity Prices

Below you can see the most recent prices for corn, soybeans, hogs, etc. from a CSV or API. Hover over lines to see exact values and dates.

Price Trends Over Time