Free, easy-to-use health calculators and unit converters built for Canadians. Each tool works instantly in your browser — nothing is stored or sent anywhere. These are general guides, not medical advice.
BMI Calculator
Find your Body Mass Index in metric or imperial units, with Health Canada weight categories.
Blood Sugar Converter
Convert blood glucose between mmol/L (Canada) and mg/dL (US), with reference ranges.
Cholesterol Converter
Convert cholesterol and triglycerides between mmol/L and mg/dL — separate, correct factors.
Sleep Calculator
Find the best bedtime or wake-up time using 90-minute sleep cycles.
Water Intake Calculator
Estimate your daily hydration needs in litres and cups, based on weight and activity.
All tools are for general information only and do not replace advice from your doctor, nurse practitioner, or pharmacist.
Frequently Asked Questions
Are these health calculators free?
Yes. Every calculator and converter on Canada Health Journal is free to use, with no sign-up and no limit on how often you use them.
Do these tools store my health data?
No. Each tool runs entirely in your browser. Nothing you enter is sent to a server, saved, or used for tracking.