Coffee Calculator
Calculate perfect brewing ratios, caffeine intake, and health recommendations
Coffee Brewing & Caffeine Calculator
Used to calculate optimal caffeine intake
How your body typically responds to caffeine
Different methods have different ratios and caffeine levels
Total cups you want to brew
Size of each cup you're brewing
Brewing Calculations
Brewing Method: Drip/V60
Total Volume: 240ml
Detailed Ratio: 3:50
Cups: 1 × 240ml
Caffeine Analysis
Example Calculation
Morning French Press
Person: 70kg adult, average sensitivity
Method: French Press (1:12 ratio)
Target: 2 cups of 350ml each (700ml total)
Results
Coffee needed: 700ml ÷ 13 parts × 1 = 54g
Water needed: 700ml ÷ 13 parts × 12 = 646ml
Caffeine per cup: 107mg
Total caffeine: 214mg
Recommended limit: 350mg (70kg × 5)
Safety level: ✅ Safe (61% of recommended)
Popular Brewing Methods
French Press
1:12 ratio, 4 min steep, 107mg/cup
Drip/V60
3:50 ratio, 2-4 min, 95mg/cup
Espresso
1:2 ratio, 25-30s, 63mg/shot
Cold Brew
9:40 ratio, 12-24h, 200mg/cup
Caffeine Sensitivity
Very Sensitive
2mg/kg body weight
Sensitive
3.5mg/kg body weight
Average
5mg/kg body weight
Tolerant
6.5mg/kg body weight
Very Tolerant
8mg/kg body weight
Safety Guidelines
FDA limit: 400mg/day for healthy adults
Pregnant women: max 200mg/day
Stay hydrated - coffee is a mild diuretic
Avoid caffeine 6 hours before bedtime
Space out consumption throughout the day
Understanding Coffee Brewing & Caffeine
Coffee-to-Water Ratios
The ratio of coffee to water is crucial for flavor extraction. Different brewing methods require different ratios to achieve optimal taste. The ratio is typically expressed as coffee:water (e.g., 1:15 means 1g coffee to 15ml water).
Factors Affecting Caffeine
- •Brewing method and extraction time
- •Coffee bean type (Arabica vs Robusta)
- •Roast level (light roasts have slightly more caffeine)
- •Grind size and water temperature
Caffeine Calculation Method
Recommended Daily Intake:
Very Sensitive: Weight × 2mg
Sensitive: Weight × 3.5mg
Average: Weight × 5mg
Tolerant: Weight × 6.5mg
Very Tolerant: Weight × 8mg
Note: These are general guidelines. Individual tolerance varies, and factors like age, health conditions, medications, and pregnancy can affect caffeine sensitivity.