Expert Verified: Reviewed by David Chen, Specialty Coffee Brewing Specialist
Master your morning brew with our French Press Calculator. Whether you are adjusting for a single cup or a large carafe, this tool ensures the perfect coffee-to-water ratio for a rich, full-bodied extraction every time.
French Press Calculator
French Press Calculator Formula:
Standard Formula:
Water (ml) = Coffee (g) × Ratio
Coffee (g) = Water (ml) / Ratio
Source: Pact Coffee Brewing Guides
Variables:
- Water Amount (ml): The total volume of hot water you intend to use. (Note: 1ml = 1g for calculation).
- Coffee Grounds (g): The weight of coarsely ground coffee beans.
- Ratio (1:X): The strength of your brew. Standard French Press ratios range from 1:12 (strong) to 1:17 (mild). 1:15 is the golden standard.
Related Calculators:
What is a French Press Calculator?
A French Press Calculator is a specialized tool used by baristas and home enthusiasts to determine the exact weight of coffee and water needed for a balanced brew. Unlike drip coffee, the French Press is an immersion method, meaning the grounds sit in the water for several minutes.
Using a calculator prevents the common mistakes of under-extraction (sour taste) or over-extraction (bitter taste) by maintaining a precise ratio regardless of your vessel’s size.
How to Calculate French Press Ratios (Example):
- Decide on your total water volume (e.g., 500ml).
- Choose your ratio (e.g., 1:15 for a balanced cup).
- Divide the water by the ratio: 500 ÷ 15 = 33.3g.
- Measure exactly 33.3g of coarse coffee for your 500ml of water.
Frequently Asked Questions (FAQ):
What is the best ratio for French Press? 1:15 is widely considered the best starting point for a balanced cup of coffee.
Can I use a French Press for tea? Yes, you can use the same calculation logic for loose leaf tea, though ratios typically differ (e.g., 1:50).
Do I measure water by weight or volume? In coffee brewing, 1ml of water equals 1 gram. It is more accurate to use a scale.
Why is my French Press coffee muddy? This is usually due to the grind size being too fine rather than an incorrect ratio. Use a coarse, “sea salt” grind.