Dog Whelping Calculator
This dog whelping calculator predicts your dog's expected whelping date instantly. Enter the mating date to calculate the whelping window, then use the guide below to gather supplies, set up the whelping box, recognize the stages of labour, and know exactly what to do — and when to call the vet — from the first contraction through newborn puppy care.
Quick Answer
Dog gestation is 63 days — approximately 9.0 weeks or 2.1 months. Dogs whelp approximately 63 days after ovulation, with a normal range of 58–68 days from the mating date. Labour itself typically takes 6–12 hours total once active straining begins, with puppies arriving 10–60 minutes apart. Enter your dog's mating date above to calculate the exact predicted whelping date.
Dog (Whelping) Gestation Calculator
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Whelping Supplies Checklist
Gather everything below by around day 55–58 so it's on hand the moment labour starts — most whelpings begin with little warning, often at night.
| Supply | Purpose |
|---|---|
| Clean towels / whelping pads | Lining the box and drying newborn puppies |
| Digital rectal thermometer | Tracking the pre-labor temperature drop |
| Clean scissors & unwaxed dental floss | Cutting/tying umbilical cords if the dam doesn't |
| Bulb syringe | Clearing airways of a puppy that needs help breathing |
| Heat lamp or heating pad | Keeping newborns warm (85–90°F) — one side of the box only |
| Kitchen scale | Weighing each puppy at birth and tracking daily gain |
| Puppy milk replacer | Backup feeding if the dam can't nurse or rejects a puppy |
| Notebook or log / whiteboard | Recording birth order, time, and weight for each puppy |
| Iodine or chlorhexidine solution | Disinfecting the umbilical stump after cutting |
| Clean trash bags | Disposing of placentas and soiled bedding |
| Vet's emergency / after-hours number | Ready to call immediately if complications arise |
How to Set Up the Whelping Box
Introduce the whelping box by around day 50–53 so your dog has time to settle in before labour begins. The box should be:
- Large enough for the dam to stretch out fully in any direction
- Lined with whelping pads or clean towels — not loose bedding, which can suffocate newborn puppies
- Fitted with a low pig rail around the inside perimeter to stop the dam from accidentally crushing a puppy against the wall
- Placed in a quiet, warm, low-traffic area of the house, away from other pets
- Kept at 85–90°F (29–32°C) for the newborn puppies, using a heat lamp positioned over one side only so puppies (and the dam) can move away from the heat if needed
- Easy to clean and reline quickly — soiled towels should be swapped out during and after whelping
Signs Whelping Is Imminent (Final 24–48 Hours)
- Temperature drop below 99°F (37.2°C): the single most reliable predictor — whelping typically begins within 12–24 hours. Start checking rectal temperature twice daily from around day 56–58.
- Nesting behavior: rearranging bedding, digging at the whelping box, seeking out secluded spots.
- Loss of appetite: many dogs skip their last meal or two before labor begins.
- Restlessness and panting: increased pacing, shivering, and visible discomfort.
- Vomiting: occasional vomiting can accompany the onset of Stage 1 labour.
- Increasing vaginal discharge: clear mucus increasing in volume as labor approaches.
The Stages of Labour
Whelping happens in three stages, and Stages 2 and 3 typically repeat for each puppy in the litter until delivery is complete.
Stage 1 — Early Labour (6–12 hours, up to 36)
The cervix dilates and contractions begin internally, but there is no visible straining yet. The dam is restless, pants, shivers, nests, and may refuse food. This stage can range from 6–12 hours in most dogs up to 36 hours in first-time mothers.
Stage 2 — Active Delivery (10–60 minutes per puppy)
Visible, forceful abdominal contractions begin and the dam actively strains to deliver each puppy. A puppy should typically arrive within 10–60 minutes of hard, consistent straining. The dam usually rests 10 minutes to 1 hour between puppies, though gaps up to 2 hours can still be normal in a large litter — beyond that, call your vet.
Stage 3 — Delivering the Placenta (within ~15 minutes per puppy)
Each placenta is usually passed within 15 minutes of its puppy, and this stage often alternates with Stage 2 as the dam delivers one puppy, passes its placenta, then continues straining for the next. Count placentas against puppies born — a retained placenta needs veterinary attention.
Total expected duration: most whelpings are complete within 6–12 hours from the first hard contraction, though litters of 6 or more puppies can take longer. If more than 24 hours pass from the start of Stage 1 without the first puppy arriving, or the whole process stalls for several hours mid-litter, contact your vet.
When to Intervene and When to Call the Vet
- Strong contractions continue for more than 30 minutes without a puppy being delivered
- More than 2–4 hours pass between puppies while the dam still appears to be in labor
- The dam seems exhausted and stops contracting before all expected puppies have arrived
- Greenish discharge appears before the first puppy is born (a possible sign of placental separation)
- A puppy appears visibly stuck in the birth canal — do not pull forcefully; call the vet
- The dam has been in Stage 1 labor for more than 24 hours without progressing to active straining
- The dam is in visible distress, has a fever, or the discharge smells foul
Minor, safe intervention (gently helping clear a puppy's airway, guiding a puppy to nurse) is normal. Anything involving a stuck puppy, prolonged straining, or a dam in distress is a job for your vet, not a home remedy.
Immediate Newborn Puppy Care
- Clear the airway: gently wipe fluid from the puppy's nose and mouth immediately after birth so it can breathe.
- Dry and stimulate: briskly rub the puppy with a clean towel — this dries it off and stimulates its first breaths and circulation.
- Handle the umbilical cord: let the dam chew it naturally if she will. If not, tie it off with unwaxed dental floss about an inch from the body, cut with clean scissors, and dab the stump with iodine.
- Get the puppy nursing: aim to have each puppy nursing within the first 1–2 hours for essential colostrum, which delivers early immunity.
- Keep it warm: newborns cannot regulate their own body temperature — maintain 85–90°F (29–32°C) in the box for the first week, dropping gradually afterward.
- Weigh and log: record birth order, time, and weight for each puppy to track early growth and spot a puppy that isn't gaining.
Common Whelping Complications
- Dystocia: difficult or obstructed labour the dam cannot complete unassisted — caused by an oversized or malpositioned puppy, a narrow pelvis, or a dead/deformed fetus. Requires urgent veterinary attention, which may include manual assistance, medication, or an emergency C-section.
- Uterine inertia: contractions are weak, stop altogether, or never start with enough force to deliver puppies — more common in small breeds, obese dogs, and large litters. Often needs medical or surgical intervention.
- Retained placenta: a placenta that isn't passed can lead to infection — watch for persistent dark or foul-smelling discharge, fever, and lethargy in the days after whelping.
- Prolonged Stage 1 labour: restlessness and nesting that continues more than 24 hours without progressing to active straining warrants a vet check.
- Fetal malposition: a puppy presenting sideways or with a limb back can block the birth canal and needs veterinary correction.
- Excessive bleeding: light bleeding is normal, but heavy or bright red bleeding during or after whelping is an emergency.
Post-Whelping Care for the Mother
- Nutrition: switch the dam to a high-calorie puppy or lactation-formula food and free-feed if needed — nursing a litter demands significantly more calories and calcium than pregnancy.
- Eclampsia watch: low blood calcium can cause muscle tremors, stiffness, restlessness, and disorientation, usually 1–4 weeks postpartum. It's a medical emergency — call the vet immediately if you see these signs.
- Mastitis watch: check mammary glands daily for heat, hardness, pain, or discharge, which can signal an infected gland needing treatment.
- Normal discharge (lochia): expect dark red to greenish discharge that gradually lightens over 3–6 weeks — foul-smelling or bright red discharge is not normal.
- Rest and monitoring: keep the dam and litter in a quiet, low-stress space, and check her temperature daily for the first week to catch infection early.
- When to see the vet post-partum: schedule a routine postpartum check within 24–48 hours of whelping to confirm no puppies or placentas were retained, and call sooner for fever, loss of appetite, foul discharge, or reduced interest in the litter.
Want the Full Pregnancy Timeline?
This calculator focuses on whelping — the birth event itself. For a complete week-by-week pregnancy timeline, nutrition guidance, and vet visit schedule from mating through whelping, see our full dog gestation calculator.
Frequently Asked Questions
How do I predict my dog's whelping date?
Add 63 days to your dog's mating (or ovulation) date to predict her whelping date, with a normal range of 58–68 days from the mating date. Use the calculator above for an exact date, the full normal range, and a milestone timeline leading up to whelping.
What are the stages of labour in dogs?
Canine labour has three stages. Stage 1 (6–12 hours, sometimes up to 36) involves restlessness, nesting, panting, and the cervix dilating with no visible straining. Stage 2 is active delivery — strong abdominal contractions and pushing, with each puppy typically born within 10–60 minutes of hard straining. Stage 3 is the passing of the placenta, usually within 15 minutes of each puppy, and often alternates with Stage 2 as the litter is delivered. The dam usually rests 10 minutes to 1 hour between puppies, though gaps up to 2 hours can be normal.
What supplies do I need for whelping?
A basic whelping supply list includes: clean towels, a whelping box with pig rail, a digital rectal thermometer, clean scissors and unwaxed dental floss for umbilical cords if needed, a bulb syringe for clearing airways, a heat lamp or heating pad, a kitchen scale to weigh puppies, puppy milk replacer as a backup, a notebook to log birth times and weights, and your veterinarian's emergency number posted where you can see it.
What are the signs that whelping is imminent?
In the final 24–48 hours, watch for a drop in rectal temperature below 99°F (37.2°C) — typically 12–24 hours before labour begins — along with restlessness, nesting behaviour, loss of appetite, panting, shivering, vomiting, and increasing vaginal discharge. The temperature drop is the single most reliable predictor, so start checking temperature twice daily from around day 56–58.
When should I intervene or call the vet during whelping?
Call your vet if: strong contractions continue for more than 30 minutes without a puppy being delivered; more than 2–4 hours pass between puppies while the dam still appears to be in labour; the dam seems exhausted and stops contracting before all puppies are delivered; you see greenish discharge before the first puppy arrives; a puppy appears visibly stuck in the birth canal; or Stage 1 labour continues past 24 hours without progressing to active straining. When in doubt, call — it's better to check in unnecessarily than to wait too long.
What is dystocia in dogs?
Dystocia is difficult or obstructed labour that the dam cannot complete on her own. Causes include uterine inertia (contractions stop or never start with force), a puppy too large or malpositioned for the birth canal, a narrow maternal pelvis, or a dead or deformed fetus blocking the canal. Dystocia is an emergency — it usually requires immediate veterinary attention and may need manual assistance, medication, or an emergency C-section.
How do I care for newborn puppies right after birth?
Immediately after birth, clear the puppy's airway by gently wiping fluid from the nose and mouth, briskly rub it with a clean towel to stimulate breathing and dry it off, and let the dam sever the umbilical cord naturally if she will — if not, tie it off with unwaxed dental floss about an inch from the body and cut with clean scissors. Get the puppy nursing within the first hour or two for essential colostrum, and keep the whelping box at 85–90°F (29–32°C), since newborns cannot regulate their own body temperature.
What post-whelping complications should I watch for in the mother?
After whelping, watch the dam for eclampsia (low blood calcium — muscle tremors, stiffness, disorientation, usually 1–4 weeks postpartum), mastitis (hot, hard, painful mammary glands, sometimes with discharge), retained placenta (persistent green-black or foul-smelling discharge, fever, lethargy), and metritis (uterine infection). Any of these warrants an urgent vet visit. A normal postpartum discharge (lochia) is dark red to greenish and gradually lightens over 3–6 weeks.
Sources & References
- American Kennel Club — Canine breeding and whelping guidelines
- Merck Veterinary Manual — Canine parturition and dystocia
- Cornell University College of Veterinary Medicine — Canine whelping and postpartum care
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Kanika
Researched and reviewed by Kanika, founder of GestationCalc. All gestation data is verified against primary veterinary and agricultural sources before publication.
Last reviewed: September 8, 2026