Understand your body and plan your fitness journey with accurate, free calculators for BMI, daily calories, TDEE, body fat and hydration.
Everything a student needs to stay on top of grades, deadlines and study time — free online calculators that run right in your browser with no registration.
Run your freelance business like a pro: generate professional invoices, price your time correctly, and understand taxes and fees — all with free tools.
A growing toolbox for developers: format, validate and convert code, build regex patterns, generate UUIDs and commit messages — fast, private and free.
Convert, resize, compress, crop and edit images directly in your browser. Supports PNG, JPG, JPEG, WebP, GIF, SVG, BMP and ICO.
BMI estimates body mass from height and weight, while the body fat calculator estimates your fat percentage using measurements like waist, neck and hip — the latter is a better fitness indicator.
The calorie and TDEE calculators use your age, gender, height, weight and activity level to estimate your daily maintenance calories and targets for losing, gaining or maintaining weight.
Yes. Calculations run entirely in your browser and no health data is uploaded or stored on our servers.
These tools give widely-used estimates (Mifflin-St Jeor and similar formulas) for guidance only. Always consult a doctor or dietitian for medical decisions.