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Free postpartum weight tool: compare delivery weight to now, see a rough weekly average, optional BMI, and how far you are from pre-pregnancy weight. Pair with our pregnancy weight gain calculator for full context—not a substitute for medical care.
Last updated: April 11, 2026
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Use 0 if you only want totals (no weekly average).
Height (optional — for BMI)
Change since delivery
Down 6.0 kg
Compared with your entered delivery weight (fluid and timing affect early readings).
Est. gain (delivery − pre)
10.0 kg
Vs pre-pregnancy
+4.0 kg
Illustrative only — fluid and timing affect the scale.
Average per week (delivery → now)
Down ~1.0 kg / week
If that pace continued linearly (not realistic long-term), roughly 4 weeks to reach pre-pregnancy weight.
Current BMI (from height)
22.8 — Normal weight
Pre-pregnancy BMI was about 21.3
You are still above your entered pre-pregnancy weight. Pace and nutrition should follow your postpartum care team—especially while breastfeeding.
Core output
Down or up from delivery
Uses the weights you enter; early fluid shifts can make the first weeks noisy.
Goal context
Signed difference
Many people do not need to “snap back”; this is only one reference point.
When weeks > 0
Change ÷ weeks
Linear math only—metabolism, breastfeeding, and sleep are not modeled.
If it makes sense
Share of estimate
Shown only when estimated pregnancy gain is positive and you have lost weight since delivery.
Categories
Standard bands
Leave height blank if you only want weight deltas.
Disclaimer
Clinician-led goals
Thyroid issues, mood, lactation, and medications can all affect weight—ask your team.
Pre-pregnancy 58 kg, delivery 68 kg, now 62 kg, 6 weeks out → down about 6 kg since delivery, about 1 kg/week, still about 4 kg above pre-pregnancy weight.
All math runs in kilograms internally. We subtract current weight from delivery weight to measure change since delivery (positive means you weigh less now). Pre-pregnancy weight anchors how far above or below that reference you are today. If you add height, we report BMI using standard categories for awareness only. For broader fitness and lifestyle planning, pair results with nutrition and activity guidance from qualified professionals.
Change since delivery = delivery weight − current weightVs pre-pregnancy = current weight − pre-pregnancy weightAverage per week = change since delivery ÷ weeks since deliveryPercent of estimated gain lost uses (change since delivery) ÷ (delivery − pre-pregnancy) when that denominator is positive and you have lost weight since delivery.
Tracking percentages? Try the weight loss percentage calculator.
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