Coffee Consumption Calculator - Caffeine Intake (US/UK)
Estimate your daily caffeine from coffee, tea and energy drinks. Includes US/UK cup sizes, safety guidance (FDA/NHS), pregnancy mode, and instant, espresso, cold brew presets.
Calculate Your Daily Caffeine Intake
FDA safe limit: up to 400 mg/day for healthy adults.
Common sizes: 8, 12, 16 oz
Caffeine Reference & Safety
General Adult Limit
Up to 400 mg/day is considered safe for most healthy adults (FDA / NHS). Avoid consuming all caffeine at once.
Pregnancy Guidance
Limit to 200 mg/day. Be cautious with energy drinks and multiple espresso-based beverages.
Sensitivity Varies
Body weight, medications, and genetics affect caffeine tolerance. Adjust intake to how you feel.
How to Use
Select your region (US/UK) and choose the size unit you use most.
Add all drinks you had today. Adjust size and quantity for each.
Check the total versus the recommended limit and adjust if needed.
Use pregnancy mode if applicable to switch to the 200 mg/day guideline.
Quick Reference (Approximate)
Related Health & Lifestyle Tools
Complete Guide to Coffee Consumption & Daily Caffeine
Caffeine Basics
Caffeine is a mild stimulant that can improve alertness, mood, and reaction time. Typical safe intake for most healthy adults is up to 400 mg/day (FDA/NHS). For pregnancy, guidance is 200 mg/day. Sensitivity varies significantly by body mass, medications, and genetics.
What Changes the Caffeine in Your Cup?
Brew Variables
- • Ratio: More coffee grounds → more caffeine
- • Grind size: Finer grind extracts more caffeine
- • Time & Temp: Longer/hotter brew draws out more
- • Roast: Light/medium roasts retain slightly more caffeine by volume
Drink Type & Size
- • Espresso: Small size, high concentration per ounce
- • Brewed coffee: Moderate per ounce, large serving sizes
- • Cold brew: Often concentrated; large cups = very high totals
- • Tea/Energy: Typically lower than coffee per cup, but varies by brand
Smart Timing Strategies
- • Avoid caffeine 6–8 hours before bedtime to protect sleep.
- • Split intake throughout the day rather than one large dose.
- • Use smaller, strategic doses (e.g., 50–100 mg) for focused work blocks.
- • Hydrate and avoid pairing caffeine with high sugar spikes.
US vs UK Cup Sizes
Example Daily Plans
- • Morning: 12 oz brewed coffee (~140 mg)
- • Midday: Espresso shot (~63 mg)
- • Afternoon: 8 oz brewed coffee (~95 mg)
- • Evening: Herbal/decaf (0 mg)
- • Morning: 8 oz instant coffee (~70 mg)
- • Afternoon: Black tea 8 oz (~45 mg)
- • Optional: Small latte single shot (~60 mg)
- • Avoid: Energy drinks & large cold brews
Warnings & When to Cut Back
- • Persistent insomnia, jitters, palpitations, or anxiety
- • Combining caffeine with certain medications or alcohol
- • High-sugar energy drinks in large volumes
- • If pregnant/trying to conceive — stay under 200 mg/day
Frequently Asked Questions - Coffee Consumption & Caffeine Intake
Health Note
This tool provides practical estimates for everyday decisions. Caffeine sensitivity varies widely. If you have a medical condition or take medications, consult your healthcare provider for personalized guidance.