Biology
Sheep Gestation Calculator
Track a ewe's pregnancy: enter the days since breeding to see how far along she is, how many days remain, and the expected lambing window.
Your inputs
Change any value to update the result instantly.
Days until expected lambing
75 days
Pregnancy completed
50 %
Days elapsed
75 days
Stage
Second third of pregnancy
Normal range for this species
144–152 days (typical average 150)
Earliest expected day
144 days
Latest expected day
152 days
Merck lists about 150 days for sheep; many meat breeds lamb slightly earlier, and ewes carrying twins often lamb a day or two sooner. Educational estimate only — confirm pregnancy and timing with a veterinarian; this tool is not veterinary advice.
What this calculator does
Projects a lambing window for a ewe from the breeding date.
What your result means
Days remaining to expected lambing, based on a ~150-day average with breed variation.
Formula and working
days remaining = gestation length − days elapsed; progress = days elapsed ÷ gestation length × 100
- 1
Collect the inputs
Days since breeding = 75 days; Gestation length used = 150 days
- 2
Apply the formula
days remaining = gestation length − days elapsed; progress = days elapsed ÷ gestation length × 100
- 3
Result
Days until expected lambing = 75 days
Frequently asked questions
Symbols and assumptions
- L
- Gestation length in days
- d
- Days elapsed since breeding
- • Approximately 150 days, per the Merck gestation table; many meat breeds lamb a few days earlier.
Sources and review
Reviewed 2026-09-22 · Next review 2027-09-22
- • Twin- and triplet-bearing ewes often lamb earlier. Not veterinary advice.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
Report a mistake or request an improvement
Tell us if a formula, unit, explanation, or result needs attention. Your message will include this calculator’s name and page.
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