Jabwise Tools
One useful answer. No lecture.
Small, calm calculators for the questions that come up on GLP-1s and through weight loss. Free to use, no account, and easy to pass on.
- Nothing you type is saved
- The maths is shown
- Every result has a shareable link
Pick the question you have
Calculators and planners
- Free tool
Weight loss percentage calculator
See how much of your starting weight you’ve lost, plus how far you are towards your own goal.
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Weight loss goal date calculator
Project your own recent average forward to see a rough goal date — without pretending weight loss is linear.
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Kg, pounds and stone weight converter
Convert any weight between kilograms, pounds, and stone plus pounds without doing the awkward remainder.
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Adult BMI calculator
Calculate adult BMI in metric or imperial units, with the UK’s lower thresholds shown where they apply.
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GLP-1 pen supply calculator
Turn the first dose from a Mounjaro, Wegovy or Zepbound pen into all four dose dates and the refill date.
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Change your jab day calculator
Count the gap from your last weekly jab to a new weekday against the official 3-day rule.
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