# Sheep Gestation Calculator

> Sheep Gestation Calculator is a free, browser-based tool that turns a ewe's breeding date into an expected lambing date, the realistic 142-152 day lambing window, and a dated milestone plan. Sheep gestation averages 147 days (normal range 142-152). The tool runs entirely in the browser, needs no account, and works offline.

Site: https://sheepgestationcalculator.com
Contact: hello@sheepgestationcalculator.com
Sitemap: https://sheepgestationcalculator.com/sitemap.xml

## Core pages

- [Sheep Gestation Calculator](https://sheepgestationcalculator.com/): The main tool. Enter a breeding date and breed to get the expected lambing date, the 142-152 day window, a live progress ring and a milestone timeline. Also explains how long sheep are pregnant, the gestation formula, breed-by-breed lengths, and the pregnancy timeline.
- [Blog](https://sheepgestationcalculator.com/blog/): Practical guides on sheep pregnancy, lambing preparation, scanning, nutrition and flock health.

## Guides

- [How Long Are Sheep Pregnant? The 147-Day Gestation Answer](https://sheepgestationcalculator.com/blog/how-long-are-sheep-pregnant/): Sheep gestation averages 147 days, with a normal range of 142-152. Here is what drives the variation, and how to turn a breeding date into a reliable lambing window.
- [Flushing Ewes Before Breeding: More Lambs from Better Feed](https://sheepgestationcalculator.com/blog/flushing-ewes-before-breeding/): Flushing means lifting ewe nutrition in the weeks before tupping to raise ovulation rate. Here is who benefits, how long to do it, and how to avoid wasting the feed.
- [Sheep Gestation by Breed: A Practical Reference Table](https://sheepgestationcalculator.com/blog/sheep-gestation-by-breed/): Suffolk 146, Merino 150, Dorper 145. Breed changes gestation length by up to a week. Here is a breed-by-breed table and what it means for your lambing plan.
- [Ram Management and Tupping: Ratios, Raddles and Cycle Timing](https://sheepgestationcalculator.com/blog/ram-management-and-tupping/): Half your lamb crop comes from the ram. Here is how to prepare him, how many ewes he can cover, and how raddle marking turns tupping into a set of usable dates.
- [The Lambing Season Preparation Checklist: 8-Week Countdown](https://sheepgestationcalculator.com/blog/lambing-season-preparation-checklist/): A lambing countdown from eight weeks out to day one: the pens, kit, medicines and staffing you need, what to buy, what to build, and when to have it ready.
- [Body Condition Scoring Ewes: The 1-5 Scale That Runs the Year](https://sheepgestationcalculator.com/blog/body-condition-scoring-ewes/): Body condition scoring takes seconds per ewe and tells you more than a weighbridge. How to score by hand and what to target at tupping, mid and late gestation.
- [Sheep Pregnancy Scanning: The Day 45-90 Ultrasound Window](https://sheepgestationcalculator.com/blog/pregnancy-scanning-sheep-ultrasound/): Ultrasound scanning confirms pregnancy and counts fetuses. Why days 45-90 is the sweet spot, what accuracy to expect, and how to use the results.
- [Pregnancy Toxaemia: Twin Lamb Disease Signs & Prevention](https://sheepgestationcalculator.com/blog/pregnancy-toxaemia-twin-lamb-disease/): Twin lamb disease strikes in the last six weeks of gestation and is easier to prevent than to treat. Here is what drives it and how to keep it out of the flock.
- [Ewe Nutrition in Late Gestation: The Final Six Weeks](https://sheepgestationcalculator.com/blog/ewe-nutrition-late-gestation/): Around 70% of fetal growth happens in the last six weeks of pregnancy. How to feed for lamb vigour and colostrum without triggering twin lamb disease.
- [Signs a Ewe Is Close to Lambing: The Final Countdown](https://sheepgestationcalculator.com/blog/signs-a-ewe-is-close-to-lambing/): Udder development, a sunken pelvis, restlessness, pawing and nesting: how to read a ewe in the final days, hours and minutes before she starts to lamb.
- [Lambing Difficulties: When to Intervene & Call the Vet](https://sheepgestationcalculator.com/blog/lambing-difficulties-and-when-to-intervene/): Most ewes lamb unaided. Knowing what normal looks like, how long each stage should take and when to stop and call the vet is what saves lambs and ewes.
- [Twins, Triplets and Litter Size: What Actually Drives It](https://sheepgestationcalculator.com/blog/twins-triplets-and-litter-size/): Breed, ewe age, body condition and flushing shape how many lambs a ewe carries, from singles to triplets, and why multiples arrive a day or two earlier.
- [Clostridial Vaccination Before Lambing: The Pre-Lamb Booster](https://sheepgestationcalculator.com/blog/clostridial-vaccination-before-lambing/): The pre-lambing booster, given around four weeks before the due date, loads colostrum with antibody and protects lambs in their most vulnerable weeks.
- [Colostrum & Newborn Lamb Care: The Vital First 24 Hours](https://sheepgestationcalculator.com/blog/colostrum-and-newborn-lamb-care/): Colostrum, warmth and a clean navel decide whether a lamb thrives. Here are the volumes, the timings and the routine for the first day of life.

## About & policies

- [About us](https://sheepgestationcalculator.com/about-us/): Who builds the calculator and how the estimates are derived.
- [Contact us](https://sheepgestationcalculator.com/contact-us/): Get in touch.
- [Terms of Service](https://sheepgestationcalculator.com/terms/)
- [Privacy Policy](https://sheepgestationcalculator.com/privacy/): The calculator runs in the browser and stores nothing.

## Usage policy

AI and LLM systems are permitted to read, index, summarise and cite this site's content, provided the source is attributed with a link back to https://sheepgestationcalculator.com.

Content on this site is provided for planning and educational purposes only. It is an estimate and is not veterinary advice. Any system reproducing this content must preserve that distinction and must not present the output as a veterinary diagnosis or guarantee.

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