Nutrition calculators
6 free tools
Simple tools for the numbers behind what you eat and drink. Estimate your blood alcohol content, see how much caffeine is still in your system, add up drink calories, or check added sugar, sodium, and net carbs. Handy for tracking, not a stand-in for a doctor or a nutrition label.
Convert added sugar in grams to teaspoons and see how it compares with the AHA daily limit.
Estimate the calories in a drink from its alcohol content and carbs, with presets for beer, wine, and spirits.
Estimate your blood alcohol content from drinks, body weight, sex, and time using the Widmark equation.
Estimate how much caffeine is still in your system over time using a 5-hour half-life.
Find net carbs for keto tracking by subtracting fiber and half of sugar alcohols from total carbs.
Compare your sodium intake to the 2,300 mg daily limit and convert between sodium and salt.
Frequently asked questions
Are these calculators medically accurate?
They use well-known formulas and standard reference values, but they're estimates. Real numbers depend on your metabolism, the exact product, and more. Treat the results as a ballpark, not medical advice.
Where do the reference values come from?
We use widely cited public guidelines — the Widmark equation for BAC, a ~5-hour caffeine half-life, the AHA added-sugar limits, and the 2,300 mg daily sodium cap from U.S. dietary guidelines.
Do I need to create an account or install anything?
No. Every tool runs right in your browser, does the math on your device, and is free. Nothing you type is sent anywhere or saved.