Budget your 200mg daily allowance safely. Trimester-specific guidance for every cup.
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Most sensitive period. Caffeine crosses placenta easily. Consider staying under 150mg if possible.
Standard 200mg limit applies. CYP1A2 enzyme activity decreases, so caffeine stays longer.
Caffeine half-life triples. Consider reducing to 150mg. Avoid caffeine after 2pm.
The tool tracks your daily caffeine budget against the 200mg NHS/FDA pregnancy limit. Each trimester has different metabolic considerations: first trimester is most sensitive, third trimester shows tripled half-life. The ring chart visualizes your remaining budget in real time.
Select your trimester, choose a beverage from the database or enter a custom amount, then click "Add to Budget." The ring chart updates instantly. Use the Trimester Notes to understand why limits vary by pregnancy stage.
• First trimester: consider staying under 150mg.
• Third trimester: half-life triples — avoid caffeine after 2 PM.
• Decaf still has 5mg per cup — it counts.
• Export your budget log for your prenatal appointments.