Free tool · No signup · Sources checked 2026-09-16
Dog Pregnancy Calculator
Enter an ovulation, LH surge or mating date to estimate the due date. Print the weekly calendar or export its dates, then use it to plan your records and discuss appointments with your veterinarian.
An estimate does not confirm pregnancy or tell you when it is safe to wait, deliver puppies or schedule surgery. Mating dates give a wider uncertainty than an identified ovulation date.
Pregnancy details
Use an identified ovulation date when available. The progesterone calculator can pass an estimate here for you to check with your veterinarian.
The ovulation date identified by your veterinarian from the testing history. A single progesterone threshold is not confirmation.
Saved on this device only, nothing is uploaded. Update the date as your timing is confirmed.
Enter a date to see the due date, care timeline & week-by-week calendar
Pick what you know, ovulation, the LH surge, or the breeding date, and enter the date.
Dog pregnancy week by week: planning and record prompts
day 0 = ovulation
Enter a date above and every week below gets real dates for your litter. Use these prompts to collect records and prepare for appointments. They do not describe confirmed fetal development or prescribe a feeding plan.
Week 1
days 0-6
Record the starting dates
- Focus:
- The calendar starts from the estimated ovulation date. It cannot establish whether fertilization or pregnancy occurred.
- Do:
- Keep the original test reports and mating dates. Ask your veterinarian to confirm the starting date and any medication or activity advice.
- Feeding record:
- Record the food name, daily amount and any supplements.
Week 2
days 7-13
Keep the records current
- Focus:
- Early appearance and behavior do not establish pregnancy. The dated week is a planning label.
- Do:
- Add any veterinary advice and observations to the record; keep estimated dates separate from events you observed.
- Feeding record:
- Keep a short note of appetite and what was actually eaten.
Week 3
days 14-20
Plan pregnancy confirmation
- Focus:
- A calendar cannot distinguish pregnancy from a false pregnancy or another cause of physical changes.
- Do:
- Contact your veterinarian to plan confirmation. Report concerning changes instead of assuming that vomiting or reduced appetite is normal.
- Feeding record:
- Date any agreed diet change so everyone follows the same instructions.
Week 4
days 21-27
Discuss the ultrasound appointment
- Focus:
- Ultrasound may be used to confirm pregnancy and assess fetal viability. A result depends on timing and the examination.
- Do:
- Check the appointment date with your veterinarian and bring the mating and test records.
- Feeding record:
- Bring the food label and feeding notes to the pregnancy appointment.
Week 5
days 28-34
Record the examination findings
- Focus:
- Record the actual findings from the pregnancy examination; the calendar does not supply a diagnosis.
- Do:
- Save the report and any follow-up dates. Discuss parasite prevention and medications with your veterinarian.
- Feeding record:
- Save any updated feeding instructions beside the examination report.
Week 6
days 35-41
Prepare the whelping space
- Focus:
- Use this week to review your preparation and the care plan for the confirmed pregnancy.
- Do:
- Prepare the whelping space and records. Note who to contact if your dog becomes unwell.
- Feeding record:
- Write down portions and meal times for anyone helping with daily care.
Week 7
days 42-48
Prepare the litter records
- Focus:
- Have the birth record and puppy identifiers ready before they are needed.
- Do:
- Review the supplies checklist and your veterinarian’s instructions. Confirm which observations to record.
- Feeding record:
- Check supplies of the agreed food before the litter arrives.
Week 8
days 49-55
Discuss the litter count
- Focus:
- A late-pregnancy radiograph can help estimate how many puppies to expect; the veterinarian determines the examination date.
- Do:
- Confirm the appointment and emergency contact details. Record the actual findings and any revised plan.
- Feeding record:
- Keep meal and appetite notes with the other late-pregnancy observations.
Week 9
days 56-63
Review the birth plan
- Focus:
- The estimated due date is a planning reference. It does not show fetal maturity or determine whether delivery is progressing normally.
- Do:
- Follow the agreed observation and emergency plan. Any decision about C-section timing belongs to the veterinarian managing the pregnancy.
- Feeding record:
- Include feeding notes when handing over care to another person.
Prepare the records
A due date is the start of your litter record
These free resources help you record observations and actual events as the litter progresses. Each article includes printable files without a signup.
Heat-cycle log
Keep observed dates and test results together before estimating a pregnancy.
Whelping record
Prepare space for puppy identifiers, birth times and notes.
Puppy-weight log
Record measured weights and observations after birth.
How the dates work
Which date should you enter?
Keep the starting point explicit. The table describes this calculator's assumptions and displayed windows.
| Starting date | Estimate | Displayed window | How to use it |
|---|---|---|---|
| Veterinarian-identified ovulation | 63 days | 62–64 days | Enter the identified date, rather than inferring it from one blood-test value. |
| Identified LH surge | 65 days | 64–66 days | LH means luteinizing hormone. This tool places estimated ovulation two days later. |
| First or only mating | 63 days | 58–68 days | The mating date stands in for an unknown ovulation date. The displayed window is not a biological limit. |
AKC describes approximately 63 days from ovulation, but a broader 58–72 days from the first accepted breeding. The calculator's mating-date window is narrower than that published range. Do not use its final date as permission to delay veterinary advice. Read AKC's explanation of the different starting dates.
The AKC Canine Health Foundation's ovulation-timing interview explains the relationship between the LH surge, ovulation and progesterone. Use your veterinarian's interpretation of the testing history; one threshold is not a substitute for that assessment.
Confirm the appointments
Use the calendar for a conversation with your veterinarian
The MSD Veterinary Manual describes ultrasound at 25–35 days of gestation as useful for confirming pregnancy and assessing fetal viability. It identifies late radiography after 55 days as the best method for determining litter size. The calendar displays fixed planning windows; your veterinarian may choose different dates. Read the diagnostic guidance.
- Record the actual appointment and findings separately from the original estimate.
- Agree on an individual feeding, medication and observation plan.
- Keep daytime and emergency contact details available before whelping.
- Ask what changes should prompt a call; a calculator cannot assess your dog's condition.
AKC's pregnancy-care overview explains why apparent signs alone can mislead and why preparation includes recognizing complications. If your dog is unwell, seek veterinary advice rather than waiting for an estimated milestone.
Frequently asked questions
Sources and related records
BreedTracker checked the linked references on 2026-09-16. This is a software planning tool, with no claim of independent veterinary review. Its calendar assumptions are described above.
- AKC: the reproductive cycle and gestation dates
- AKC Canine Health Foundation: ovulation timing
- MSD Veterinary Manual: pregnancy determination
- AKC: pregnancy care and preparation
- Progesterone timing calculator
- Whelping kit checklist
- Standard Poodle health testing and records
- How to record a litter in BreedTracker
Keep the litter's records together
Record heats, litters, puppy weights and buyer details in BreedTracker. Follow the user guide to see how the records fit together.
Free for up to 4 litters a year · No credit card required