My saved plans
Weight and calories
TDEE calculator
Calories you burn a day, plus targets to lose, keep or gain
OpenCalorie deficit calculator
Your daily target and a realistic goal date
OpenProtein floor calculator
How much protein keeps muscle while you lose fat
OpenMacro calculator
Protein, carbs and fat in grams for any calorie budget
OpenBMI and GLP-1 eligibility
Your BMI and where it sits against label thresholds
OpenSteps to miles
Distance, time and calories from your step count
OpenBody and habits
BMR calculator
Energy your body uses at complete rest
OpenBody fat calculator
US Navy tape method with fat and lean mass
OpenIdeal weight calculator
Four classic formulas plus the healthy BMI range
OpenWater intake calculator
A daily fluid target for your weight and activity
OpenIntermittent fasting calculator
Your eating window and a week of meal times
OpenGLP-1 tools
GLP-1 weight-loss projection
Expected loss by drug, dose and week, from trial data
OpenGLP-1 dose schedule
Your titration calendar with calendar export
OpenSide-effect timeline
What the label reports at your dose step and week
OpenGLP-1 cost and savings
List, self-pay and savings-card prices side by side
OpenTDEE on a GLP-1
Your calorie needs vs what you actually eat now
OpenTirzepatide dose calculator
Where you are on the Zepbound or Mounjaro ladder
OpenWeigh-in tracker
Log weekly and compare with the trial curve
OpenFitness
Precomputed charts
Common questions
Are these calculators free?
Yes. There's no sign-up, no email gate and nothing to install. Results update as you type.
Do you store what I type?
No. Calculations run in your browser. Saved plans and weigh-ins stay in your browser's storage on this device.
How accurate are calculator results?
They use published formulas, which estimate averages. Treat any number as a starting point and adjust based on your own results over a few weeks.